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THE SYSTEM OF
ANIMATE NATURE

THE GIFFORD LECTURES DELIVERED IN

THE UNIVERSITY OF ST. ANDREWS

IN THE YEARS 1915 AND 1916

BY

J. ARTHUR THOMSON, M.A., LL.D.

Professor of Natural History in the University of Aberdeen

IN TWO VOLUMES
VOL. I

LONDON

WILLIAMS & NORGATE

1920

PRINTED IN US.A.

9obtn Company

BOOK MANUFACTURERS
RAHWAV NEW JERSEY

GRATEFULLY INSCRIBED TO

MY TEACHER, COLLEAGUE, AND FRIEND,

PROFESSOR PATRICK GEDDES

" All depends on keeping the eye steadily fixed on the facts
of nature and so receiving their images simply as they are.
For God forbid that we should give out a dream of our imagi-
nation for a pattern of the world : rather may He graciously
grant us to write an apocalypse or true vision of the foot-
steps of the Creator imprinted on His creatures."

BACON

" This I dare affirm in knowledge of Nature, that a little
natural philosophy, and the first entrance into it, doth dispose
the opinion to atheism, but on the other side, much natural
philosophy and wading deep into it, will bring about men's

minds to religion."

BACON

PKEFACE

IT was evidently tho desire of the founder of the Gifford
Lectureships in the Scottish Universities that each lecturer
should, from his own special studies and in his own way,
endeavour to make some contribution that would help others
in considering tho highest questions that Man can ask: What
kind of world is this in which we live a universe or a
multiverse? How has it come to be as it is? Does it give
any hint of a purpose? What is Man's place in Nature?
To what extent does our knowledge of Nature conform with
our conception of God ?

Lord Gifford contemplated the possibility of very varied
answers to these and similar questions; he thought it pos-
sible that some of them might be held to be unanswerable;
his one stipulation was for reverent study.

Under provisions so liberal, no apology need be made for
a contribution which is scientific rather than philosophical,
being in the main confined to the biological outlook. What-
ever be our philosophical interpretation or our religious con-
viction, we must admit the desirability of having more than
a passing acquaintance with the system of things of which
our everyday life is in some measure part. The idea of
Nature as a temptress leading man's soul astray has long
since disappeared, and most of us turn to Nature with ex-
pectancy, varying with our temperament and experience.
If the world we call " outer " be in any sense God's creation,
will it not reveal to us something of Him ? If it be our chief
end to glorify God, should we not put ourselves in the way

y

vi PREFACE

of intellectually enjoying the works of His hands? If
Nature is expressing a thought, may we not try to spell this
out by patient observation? Even if we have no philosophi-
cal or religious preconceptions of this sort, we are likely to
understand our own life better by inquiring into the order
of things in which we are immersed, sometimes, perhaps,
almost submerged.

The aim of this study of Animate Nature is to state the
general results of biological inquiry which must be taken ac-
count of if we are to think of organic Nature as a whole and
in relation to the rest of our experience. Both among care-
ful thinkers and careless passers-by views of organic Nature
are held, in regard, for instance, to the organism as mechan-
ism, the determinism of heredity, the struggle for existence,
which seem to the author to be lacking in accuracy or in
adequacy, which therefore tend to involve unnecessary diffi-
culties in systematisation and perhaps gratuitous confusion
in conduct. It has been declared by some that the world of
life is " a dismal cockpit ", that in the behaviour of living
creatures mind is a negligible quantity, that the study of
heredity must leave us fatalistic, and that evolution is largely
" a chapter of accidents ". Such views engender what may
be called natural irreligion, and it is the object of this course
to show that such views are scientifically untenable.

Nature doubtless presents many puzzling features, but care
must be taken to make sure that what seem to be uncon-
formabilities are not due to the inadequacy of our knowl-
edge. While trying to keep wishes from fathering thoughts,
we have been led in our study to see that the general results of
Biology, when stated with accuracy, are not out of line with
transcendental conclusions reached along other paths, con-
clusions which different minds express in different forms.

PREFACE vii

It looks as if Nature were much more conformable than is
often supposed to religious interpretation, hut we have not
seen it to be our duty to justify the ways of God to man.
We have tried to keep as close as possible to the facts of the
case, leaving philosophical and religious inferences for
those who are better qualified to draw them.

Our endeavour to present the scientific view of Animate
Nature has often led only to a disappointing balancing of
alternative formulations, for science abounds in open ques-
tions; it has also involved considerable noise of facts through-
out the lectures, for there is no other way of getting beyond
mere opinions. But it will be understood that the appeal to
facts is not exactly for their own sake, as in a course of lec-
tures on descriptive Biology, but as a basis for those distinc-
tive biological and psycho-biological concepts of organism,
behaviour, development, heredity, evolution, and so on, which
must be included in a philosophical view of Nature.

It would be ungracious not to use this opportunity of
thanking many friends in St. Andrews and Dundee espe-
cially Principal Sir John Herkless and Principal John Yule
Mackay from whom I received much kindness while de-
livering these lectures.

UNIVERSITY OF ABERDEEN,
May, 1919.

CONTENTS

PART I.
THE REALM OF ORGANISMS AS IT IS.

LECTURE I.

PAGE

THE UNFATHOMED UNIVERSE AND THE AIM OF

SCIENCE . . . H . ... 3

1. Man's Early Outlook on Nature, 3 2. Growing Rec-
ognition of a Scientific Order, 4 3. Aims of Science, 8
4. Limitations of Natural Knowledge, 13 5. The Func-
tion of Feeling in our View of Nature, 25 6. Towards
a Philosophical Interpretation of Nature, 34 7. Science
and Religion, 39.

LECTURE II.

THE REALM OF ORGANISMS CONTRASTED WITH THE

DOMAIN OF THE INORGANIC .... 49

1. Things and Living Creatures, 49 2. The Charac-
teristic Features of the Realm of Organisms, 50 3. A
Multitude of Individualities, yet a Systema Naturae, 51-
4. Abundance and Insurgence of Life, 53 5. Struggle
and Sifting, 56 6. A System of Inter-related Lives, 58-
7. The Prevalence of Adaptations, 59 8. The Pervasive-
ness of Beauty, 62 9. The Other Side of the Picture, 63
10. Resemblances between the Realm of Organisms and
the Domain of the Inorganic, 63 11. Contrasts between
the Realm of Organisms and the Domain of the Inorganic,
71 12. The Suitability of the Inorganic to be the Basis
and Environment of the Organic, 73.

LECTURE III.

THE CRITERIA OF LIVINGNESS .... . 79

1. Living and Not-living, 79 2. The Essential Charac-
teristics of Living Organisms, 80 3. Persistence of a Com-
plex Specific Metabolism and of a Corresponding Specific
Organisation, 81 4. The Capacity of Growth, Reproduc-
tion, and Development, 91 5. Effective Behaviour, Regis-
tration of Experience, and Variability, 97.

ix

x CONTENTS

LECTURE IV.

PAGE

ORGANISM AND MECHANISM 107

1. Is Organism More than Mechanism?, 107 2. Chemical
and Physical Laws Apply to Organisms, 110 3. Some Diffi-
culties in the Application of Physical and Chemical Formula
to Organisms, 113 4. Criticism of Mechanistic Descrip-
tions of Everyday Functions, 117 5. Criticism of Mechan-
istic Descriptions of Animal Behaviour, 122 6. Difficulty of
Applying Mechanistic Formulae to Development, 126 7.
Difficulty of Applying Mechanistic Formula to Organic Evo-
lution, 131 8. Answers to Criticisms, 135.

LECTURE V.

THE UNIQUENESS OF LIFE 143

1. The Inadequacy of a Mechanistic Description of Organ-
isms Is a Negative Conclusion, 143 2. The Problem: Vital-
ism or Mechanism, or Neither?, 144 3. Are Organisms
Unique in Virtue of their Complexity?, 147 4. Have Organ-
isms a Monopoly of Some Peculiar Energy or Energies?, 149
5. Is there a Non-perceptual Vital Agency resident in
Organisms and Operative in distinctively Vital Activities?,
153 6. Descriptive or Methodological Vitalism: the * Bio-
logical ' View, 159 7. Speculative, 103 8. Retrospect, 166
- 9. Why Cannot the Controversy between Mechanistic and
Vitalistic Theory be Ended?, 169.

LECTURE VI.

ANIMAL BEHAVIOUR 175

1. What Is Behaviour?, 175 2. Diverse Views as to
Animal Behaviour, 177 3. Activities of Unicellular Organ-
isms, 179 4. Special Case of Shell-building among Are-
naceous Foraminifera, 185 5. Reflex Actions, 186 6.
Tropisms, 192 7. Non-intelligent Experimentation, 195
8. Instinctive Behaviour, 198 9. Theories of Instinct,
203 10. Evidence of Intelligent Behaviour, 211 11. Sec-
ondary Simplifications of Behaviour, 215 12. Rational Con-
duct, 217 13. General Impressions of Animal Behaviour,
217.

LECTURE VII.

THE PROBLEM OF BODY AND MIND 227

1. The Approach to the Problem, 227 2. What Must Be
Recognised from the Biological Side, 230 3. What Must
Be Recognised from the Humanist Side, 234 4. Various
Theories of the Relation of * Mind ' and Body ', 236 5.
Monistic Speculation along the Line of the Double-Aspect
or Correlation Theory, 251.

CONTENTS xi

LECTURE VIII.

PAGE

THE FACT OF BEAUTY 250

1. A Synoptic View of Animate Nature Must Include the
Fact of the Pervasiveness of Beauty, 259 2. General Char-
acteristics of the ./Esthetic Emotion, 260 3. Beauty a
General Quality of Animate Nature, 261 4. Theoretical
Objections to the Thesis, 261 5. Concrete Objections, 265-
6. Factors in /Esthetic Delight, 267 7. Aspects of
Beauty in Animate Nature, 271 8. Biological Significance
of Beauty to the Beautiful Animals themselves, 275 9.
Beauty of Animal Artifice, 278 10. Evolution of /Esthetic
Emotion, 279 11. The Significance of the Pervasive Beauty
of Animate Nature, 282.

LECTURE IX.

THE ISSUES OF LIFE . . 289

1. The Tactics of Animate Nature, 289 2 The Twofold
Business of Life, 291 3. The Struggle for Existence, 203-
4. Correction of Some Misconceptions of the Struggle for
Existence, 301 5. The Welfare of the Species, 305 6.
As regards Warfare, 308.

LECTURE J.

ADAPTIVENESS AND PURPOSIVENESS . 310

1. Animate Nature Abounds in Adaptations, 319 2 Their
Origin neither by Design nor Mechanical, 325 3. Is
There 'Purpose' in the Inorganic Domain?, 330 4.
Purposefulness and Purposiveness in Human Behaviour, 331-
5. Purposiveness and Purposefulness in Animal Behaviour,
335 6. The Purposelikeness of the Ordinary Functioning
of the Body is Covered by the Concept of Adaptation, 341-
7. Provisional Conclusion and Anticipation, 343.

PART I.

THE REALM OF ORGANISMS

AS IT IS.

LECTURE I.

*

THE UNFATHOMED UNIVERSE AND THE

AIM OF SCIENCE.

LECTUKE I.

THE UNFATHOMED UNIVERSE AND THE

AIM OF SCIENCE.

1. Man's Early Outlook on Nature. 2. Growing Recognition
of a Scientific Order. 3. Aims of Science. 4. Limita-
tions of Natural Knowledge. 5. The Function of Feeling in
our View of Nature. 6. Towards a Philosophical Inter-
pretation of Nature. 7. Science and Religion.

1. Mans Early Outlook on Nature.

IN early days men must have looked somewhat dis-
tractedly and uncomprehendingly on the crowded world
without, discerning only glimpses of order amid the hig
booming confusion. There is a ring of truth in the fine
description ^Eschylus gave, that " first, beholding they
beheld in vain, and, hearing, heard not, but like shapes in
dreams, mixed all things wildly down the tedious time, nor
knew to build a house against the sun with wicketed sides,
nor any wood-work knew, but lived like silly ants, beneath
the ground, in hollow caves unsunned. There came to them
no steadfast sign of winter, nor of spring flower-perfumed,
nor of summer full of fruit, but blindly and lawlessly they
did all things."

Poincare speaks of the days before Man learned from the
stars that there was a reign of law. " Isolated amidst a
nature where everything was a mystery to him, terrified at
each unexpected manifestation of incomprehensible forces,
he was incapable of seeing in the conduct of the universe
anything but caprice' (1913, p. 290). So large were

3

4 THE UNFATHOMED UNIVERSE

the seas of ignorance, so many the straits, that there was
as yet no discernment of the coherent continents of
knowledge.

Gradually, however, Man came to himself and grew in
knowledge of the empirical order of Nature. It was a great
step when he first recognised the year with its object-lesson
of recurrent sequences a basis from which to observe other
practically important uniformities. What a momentous be-
ginning the Chaldseans made who first discerned that the
multitude of the stars was " not a confused crowd wander-
ing at random, but rather a disciplined army " ! It was a
working knowledge of natural processes, rather than an
understanding of them, that was in the first instance built
up, and it was correlated, on the one hand, with a still very
imperfect mastery of the forces of Nature, and, on the other,
with a belief in magic and in the possession of things by
spirits imaginative constructions which are perhaps analo-
gous, as Prof. W. E. Hitter suggests, to the materialism and
animism of later days.

2. Growing Recognition of a Scientific Order.

The empirical order was gradually replaced by a scientific
order. Some practical need pressed a question home; im-
agination found a clue; measurement or some other form
of accurate registration furnished reliable data ; a regularity
of sequence was discovered and tested ; a law was formulated.
Especially after the foundation-laying work of Galileo, did
the scientific reconstruction of the physical world proceed
apace. There was a period of the discovery of the ' Forces
of Nature ' and of the i Laws of Nature ', and a growing
clearness. " God said, Let Newton be, and there was
light."

THE UNFATHOMED UNIVERSE 5

The scientific order has grown like an organism. Its
methods have become more penetrating; improvements in
instruments (such as telescope and microscope, spectroscope
and radioscope) have almost meant new senses. Its stand-
ard of accuracy has heen raised, many residual phenomena
and minute discrepancies, previously neglected, have pointed
the way to discoveries, as in the case of Argon. Its con-
cepts have been periodically thrown into the crucible of
criticism, and come out clearer, or not at all. Thus force,
instead of being a power inherent in substances, became
a measure of the rate of transference of energy, and heat
became a mode of motion. Large bodies of facts which
used to be regarded as beyond science, the weather and
dreams for instance, have become amenable to scientific treat-
ment.

The progress of science wrought inevitable changes in
man's outlook. The work of Copernicus and Galileo shat-
tered the geocentric theory, which made our Earth the centre
of the solar system, and subsequent discoveries showed what
a small corner of the universe our whole system occupies.
Not that we estimate man's kingdom in furlongs ! The
great discoverers in astronomy, physics, and chemistry re-
vealed more and more clearly the reign of law in the in-
organic world. No room was left for guidance or control
other than there is in the nature of things themselves; no
room was left for interventions or influxes; and the idea
that physical events were immediately ordered " by the hand
of God " in relation to human interests disappeared like a
dream. There came indeed to be an exaggeration of the
omnipotence of the Laws of Nature man's formulations
of observed uniformities of sequence, which, although they
evidently approximate to reality, cannot be invested with

6 THE UNFATHOMED UNIVERSE

absolutism. Yet the old order changed, giving place to a
new the whole inorganic world was more and more com-
pletely and consistently analysed in terms of dynamics.

In regard to the realm of organisms also the outlook
changed. The filiations of living creatures were discovered
and the special creationists retreated before the evolutionists.
It was shown that the living body is the theatre of many
chemical and physical operations in a line with those of the
inorganic domain. The chains of physiological events that
make up everyday functions and behaviour were disclosed.
Plants and animals were brought under the reign of law.
The fitnesses or adaptations which seemed to speak so elo-
quently of a direct Designer were shown to be the outcome
of long-continued processes of varying and sifting. And
when Man's zoological place in Nature was recognised, the
anthropocentric theory saw the beginning of its end. Even
for those who continue to maintain, rightly we think, that
organism is more than mechanism, that organic evolution
is not a mechanical process, that thinking, feeling, and
willing are activities that count, that man transcends his
ancestry, and that it is not only legitimate but necessary
to regard the cosmic process in the light of its outcome
the whole aspect of the world has changed.

But experience is the only limit to the application of
scientific methods, and a new psychology began to accom-
pany the new physiology, rather at the risk of its own life,
to be sure, because of its partner's appetite. The outlook
was changed by the disclosure of the close interdependence
of what is conveniently called ' mind ' and what is con-
veniently called ' body ', by increased knowledge of the
individual development and racial evolution of mental
powers or modes of behaviour, by a disclosure of a certain

THE UNFATHOMED UNIVERSE

amount of common ground between man and IH-JM, by an
analysis of obligatory modes of activity which \\v call n-
flexes and tropisms, and so on. Thus science has extended
its claims.

With the advance of natural knowledge at times very
slowly, and again by leaps and bounds has come an in-
creased control of Nature which is as rich in promise as in
achievement. We have recalled the picture ^Eschylus gav<-
of our ancestors living in caves, fearful of wild beasts,
often dying of hunger or of poison, without wood-work <>r
metals, without fire, without foresight, and unable to think
of the general well-being. What a contrast between that
picture and our life to-day. For nowadays the serpent that
bites Man's heel is in nine cases out of ten microscopic;
year by year Man increases his mastery over the physical
forces; he coins wealth out of the thin air; he annihilates
distance with his shrewd devices; he makes the ether carry
his messages; he is extending his rule to the heavens; and
he is making experiments on the control of life itself. In
the so-called purely physical domain, at least, his dreams
have more than come true.

After a long period during which science consisted of
numerous discrete bodies of knowledge, largely related to
the practical control .of Nature, there began to be concentra-
tion into a system, a sort of cosmology. Science entered
upon a new and purely theoretical role of giving man a com-
posite picture of the world and its processes. This is in-
creasingly impressive, the more we realise it- -which means
hard work. After a long ascent we get a new view, rcstheti-
cally magnificent, intellectually a revelation of connected-
ness. But, fine as it is, the scientific picture has satis-
fied very few thinkers of distinction, the chief reason being

8 THE UNFATHOMED UNIVERSE

that the contributions which each science makes are always
partial views, reached by processes of abstraction, by fo-
cussing attention on certain aspects of things. Pooling the
results of the several sciences does not of itself result even
in a scientific system, for that requires correlation. Still
less does it result in a philosophic system. This will be
clearer if the aims of science are discriminated.

3. Aims of Science.

Science expresses a quite specific endeavour to get phenom-
ena under intellectual control, so that we can think of them
economically and clearly in relation to the rest of our
science, and so that we can use them as a basis for secure
prediction and effective action. Knowledge is foresight,
and foresight is power. The direct motives of science are,
in the main, intellectual curiosity, a self-preservative dis-
like of obscurities, a desire for unity and continuity in
outlook. Often, in particular cases, the immediate motive
may have been utilitarian a desire for mastery; but the
great majority of important practical discoveries have be-
hind them a long labour of theoretical research pursued
for its own sake.

That the chief end of science is descriptive formulation
has probably been clear to keen analytic minds since the
time of Galileo, especially to the great discoverers in astron-
omy, mechanics, and dynamics. But as a definitely stated
conception, corrective of misunderstandings, the view of
science as essentially descriptive began to make itself felt
about the beginning of the last quarter of the nineteenth
century, and may be associated with the names of Kirch-
hoff and Mach. It was in 1876 that KirchhofF defined the
task of mechanics as that of " describing completely and in

THE UNFATHOMED UNIVERSE 9

the simplest manner the motions which take place in Na-
ture ". Widening this a little, we may say that the aim
of science is to describe natural phenomena and occurrences
as exactly as possible, as simply as possible, as completely
as possible, as consistently as possible, and always in terms
which are communicable and verifiable. This is a very dif-
ferent role from that of solving the riddles of the universe,
and it is well expressed in what Newton said in regard to
the law of gravitation. " So far I have accounted for the
phenomena presented to us by the heavens and the sea by
means of the force of gravity, but I have as yet assigned
no cause to this gravity. ... I have not been able to
deduce from phenomena the raison d'etre of the properties
of gravity and I have not set up hypotheses ' (Newton,
Philosophies naturalis Principia Mathematica. 1687).

"We must confess," said Prof. J. H. Poynting (1900,
p. 616), "that physical laws have greatly fallen off in
dignity. No long time ago they were quite commonly de-
scribed as the Fixed Laws of Nature, and were supposed
sufficient in themselves to govern the universe. Now we
can only assign to them the humble rank of mere descrip-
tions, often erroneous, of similarities which we believe we
have observed. ... A law of nature explains nothing,
it has no governing power, it is but a descriptive formula
which the careless have sometimes personified." It used to
be said that " the laws of Nature are the thoughts of God " ;
now we say that they are the investigator's formulae sum-
ming up regularities of recurrence.

This view of the function of science must be accepted as
expressing at least part of the truth, for who should know
better what they are aiming at than the great discoverers
themselves ? But is it not necessary to make certain reserva-

10 THE UNFATHOMED UNIVERSE

tions? (a) First, instead of explaining an event by show-
ing that it obeys a law of Nature, the modern investigator is
content to say that it is fully described or represented in
such and such a formula, that it can be included in this
or that typical case. As Aristotle said, from a great number
of experiences one general conception .is formed which will
embrace all similar cases. There is unification under a
common law. As Clifford says, " A true explanation refers
the previously unknown to the known." It assimilates the
less known to the better known. But we must not overlook
the preliminary analysis and reduction to a common denom-
inator which made it possible to bring an apparent incom-
mensurable into a series, and to recognise unity and
continuity of process. Equations may not be explanations,
but the analytic descriptions given by exact science are very
different from the pictorial descriptions of everyday life.
There is sometimes a mock modesty in the declaration of the
scientific inquirer that he is describing not explaining; and
there is deceptiveness in his formulation, if he reaches his
simplification by violence, by a jugglery which coerces to a
common denominator such fractions of reality as motion and
emotion which are radically incommensurable.

(&) Second, there are laws of Nature such as Gravita-
tion, which sum up uniformities in terms largely independ-
ent of hypothetical constructions. These must be distin-
guished from summations in terms of what Rankine called
" conceptions of a conjectural order ' which image the inti-
mate nature of things and processes. Ohm's laws remain,
whatever be our view of electrical energy. Mendel's law
remains, whatever be our views as to what are called ' fac-
tors ' in inheritance. As long as we consider moving bodies
in bulk within sensible distances of the earth, the law of

THE UNFATHOMED UNIVERSE 11

gravitation holds absolutely, and states without hypothesis
how the motions of the bodies and the earth are mutually
affected. But if we proceed, with Le Sage or some other,
to a theory of gravitation, we enter a realm of imaginative
construction. We work with concepts which are, no doubt,
ingenious, well-thought-out, consistent, and useful; but how
far they correspond to, or are representative of objective
entities is a question to be carefully considered. Sometimes
the concepts that are effectively worked with are obviously
mere symbols; thus no one supposes that carbon atoms are
really like their quite useful quadrumanous diagrammatic
representations in books on chemistry. The difficulty is in
regard to subtler symbols or concepts, which work so well
that we inevitably come to think of them as objective actual-
ities. And it may be that what was at first an imaginative
thought-economising symbol, part of a system of intellectual
shorthand, will be actually verified in Nature. Thus many
physicists now speak confidently and convincingly of the
' reality ' of the atom. When it is legitimate to speak of
a scientific symbol as real is a matter for the experts only,
as is plain enough from their disagreement. Thus the ether
was declared by Lord Kelvin to be the greatest certainty in
physics, while we find the upholders of the Principle of
Relativity declaring that the Victorian ether and the Vic-
torian matter must both go. Similarly in biological prob-
lems, such as those centred in inheritance, there is diver-
gence of opinion as to the objectivity of t biophores ',
6 determinants ', ' factors ', and i genes ', though these are
very useful in formulating conclusions and prompting fur-
ther questions.

(c) Third, it has to be remembered that the descriptive
formulae are more than summations of the routine of in-

12 THE UNFATHOMED UNIVERSE

dividual experience (a view which would lead us near the
impasse of solipsism) , for they are verifiable by all normally
constituted minds, and that they must have a close corre-
spondence with the actualities of Nature since the predictions
based on them are fulfilled. We continually risk our lives
on the closeness of this correspondence. That we are not
betrayed proves, not that the concepts or intellectual count-
ers used in representation are like the real things, or are
even the only usable concepts, but that the uniformities
which the concepts are used to detect and to represent are
real.

Speaking of the electrical theory of matter, the late Prof.
J. H. Poynting said : " The chief value of such hypothesis
lies, not in its objective truth, but in its success in account-
ing for, in co-ordinating, what we actually observe, and in
predicting results which are afterwards verified. It is to
be regarded as a ' working model ' which gives the same
results as the actual atom, though, it may be, by quite
different machinery." While adhering to this view, let
us, however, safeguard it. by recognising that the validity
of the working model depends on its verifiability, and on
its correspondence with actualities. As Hertz said, the
quality of scientific symbols is such that their intellectually
necessary consequences correspond to occurrences. For
certain purposes the view that the sun goes round the earth
is just as effective as the conclusion that the earth goes
round the sun. We can rise at dawn with equal punctuality
on either hypothesis. But beyond a short radius the former
will lead us hopelessly wrong, while the latter never will.

(d) Fourthly, it is interesting to notice that Bacon did
not include hisioria naturalis in his encyclopedia of the
sciences, probably because it remained too concretely de-

THE UNFATHOMED UNIVERSE 13

scriptive and did not admit of formulation in terms of ab-
stract concepts, as astronomy, for instance, does. Yet there
is in natural history a kind of description which is just
as essential in its own place as is mechanical or dynamical
description namely, historical description. We would not
buy a horse on the strength of a description in terms of the
dynamics of particles, partly because we could not go far
in the way of checking its accuracy, but mainly because of
our shrewd conviction that the essential thing is to know
what we can about the horse's history. Similarly, our
science of the horse must include not only its whole architec-
ture from skull to blood crystals, not only the consensus of
its active parts from brain to phagocytes, but also its char-
acter and its individual and racial becoming. Even within
the sciences of the inorganic, when dealing, for instance,
with the geological interpretation of scenery or the establish-
ment of the solar system, the description must be genetic
or historical. It is an interesting point that, just about the
time when Physics began to proclaim emphatically that its
office was to describe not to explain, Natural History in
Darwin's hands passed emphatically from description to
historical explanation.

4. Limitations of Natural Knowledge.

Science makes so many permanent discoveries, which are
never contradicted though often transcended, that she ac-
quires an assured confidence which has only been equalled
by that of Theology. For this very reason it is useful that
she should be ever examining herself. One of the famous
balance-sheets was that made by Du Bois-Keymond in his
lectures on the Seven Riddles of the Universe and on the
Limits of Natural Knowledge. He confessed that the

14 THE UNFATHOMED UNIVERSE

science of his day could not offer any explanation of the
origin of life, the apparent purposiveness of Nature, and the
origin of language; but he did not hold that these enigmas
were insoluble. On the other hand, as to the essence of
matter and energy, the origin of motion, the fact of sensa-
tion, and the freedom of the will, his pronouncement was
not only Ignoramus, but Ignorabimus. Similarly to-day,
without ceasing for a moment to admire the splendour of
scientific achievement, and the promise that there is of fur-
ther conquests, we have to say many times Ignoramus, and
perhaps it is no bad sign of the wholesomeness of modern
science that it is acutely aware of its limitations both in-
trinsic and extrinsic.

(a) To begin with, there is less forgetfulness of the
fact that we know Nature only as it is mirrored in our
minds. When we think of what science would have been if
the stars had been always hidden in cloud, we realise that
much has depended on the stimuli of the outer world ; but
the discernment of the cosmos has been within us, growing
with our strength and hindered by our limitations. It is a
familiar experience, for instance, that our immediate per-
ceptual power increases at compound interest, the eye per-
ceiving more and more as the mind is educated. Our
concepts stimulate our perceptual powers to a higher degree
of intensity.

(b) A large part of even the near at hand world is
invisible, like the air. Much may escape all our senses,
as the ultra-violet rays, which the ants feel, escape our
eyes. It is said that there are living creatures, the Chlamy-
dozoa, which lie just on the border-line of microscopic
visibility; and beyond these minima scnsibilia there may be
organisms still smaller. An alien observer of the earth in

THE UNFATHOMED UNIVERSE 15

early days might have complained of its azoic dullness, while
the primitive Biococci were proliferating in billions be-
neath his feet. So to-day there may be forms of life and
modes of energy around us which we do not know.

In any case, how different our world is from that of
the man born blind; and what, asks John Burroughs, if
we could go on opening one eye after another to the number
of a dozen or so, and were able, he should have added, to
correlate our impressions ? What if we had three or more
extra senses? How different our view of Animate Nature
would have been if the microscope and the spectroscope, to
name only two of our extraneous sense-organs, had not been
invented ! Apart from such imaginings we have many re-
markable facts in regard to the cultivation of the senses that
we have. The blind man knows every footstep in the vil-
lage. In the opinion of some experts, there are consider-
able tracts of fallow ground in our brains, which may one
day be tilled. How slow should Man be in supposing that
he has exhausted a subject! There are few who have even
a calculus which will show them how far they have suc-
ceeded in discerning the more or less obvious inter-relations
or ' aspects ' of the object of their study. Warned by such
errors as that of Comte, who declared that Man could never
know anything as to the chemical composition of the
heavenly bodies, we have learned to be cautious in not put-
ting in ' full stops '. There is a large library now on the
animals of the Deep Sea, yet it is not very long since a
great naturalist declared that of the possible tenants of the
Oceanic Abysses we could not hope to know anything un-
less some of them if there were any happened to tumble
upwards to the superficial zones of reduced pressure.
Science has reason to beware of saying " Non possunni* ".

16 THE UNFATHOMED UNIVERSE

Yet, as a warning against finality in another direction, we
must admit the vagueness that is apt to invest our knowledge
of the past. In the perfectly exact sciences, we can some-
times work backwards with remarkable certainty to comets,
eclipses, and the like; but in Biology how watchful we have
to be lest we get entangled in the vicious circle of inventing
a past from its continued life in the present, and then in-
terpreting the present in terms of our invention.

(c) A reasonable humility of mind is also engendered
by recognising how limited, after all, is our range of exact
data. The late Professor Rowland, a distinguished physi-
cist, writes (1899, p. 408) : " In time we are limited by a
few hundred or possibly thousand years. ... In space we
have exact knowledge limited to portions of our earth's sur-
face and a mile or so below the surface, together with what
little we can learn from looking through powerful telescopes
into the space beyond. In temperature our knowledge ex-
tends from near the absolute zero to that of the sun, but
exact knowledge is far more limited. In pressures we go
from the Crookes vacuum, still containing myriads of flying
atoms, to pressures limited by the strength of steel, but still
very minute compared with the pressures at the centre of
the earth and sun, where the hardest steel would flow like
the most limpid water. In velocities we are limited to a few
miles per second. In forces to possibly one hundred tons to
the square inch. In mechanical rotations to a few hun-
dred times a second." Perhaps some of these limits have
been extended since Professor Rowland gave the address
from which we have quoted, but that would not affect our
point, the importance of bearing in mind the limits of
exact knowledge.

(d) Another limitation is involved in the very nature

THE UNFATHOMED UNIVERSE 17

of scientific procedure, which makes headway by abstraction.
Divide et impera is the scientific rule. The scientific de-
scription of Nature is made up of many partial views con-
tributed by the several sciences. We have to confine our
attention at a given time to certain aspects of a thing or
process. We treat of the mass of a body as if we had the
body under the influence of gravitation only, though we
know that we cannot secure the entire absence of electrical,
magnetic, and other forces. Science works with perfect
levers, with pure masses, < ideal systems ' in general-
which we do not meet in everyday life.

In certain cases the abstracting is obvious and not danger-
ous; in other cases it escapes attention and leads to fallacy.
We know that biologically we cannot abstract the trout from
the stream; even for the purposes of analytical anatomy we
must remember the environment, still more when dynamical
relations are considered. This is obvious, but is it so ob-
vious that a theory of animal behaviour which reduces all
to l forced movements ' or tropisms is the outcome of ' a
process of abstraction which leaves out the characteristic
features of the concrete fact to be explained ", the plasticity,
the endeavour, the awareness of the organism ?

(e) When we take the long and wide philosophical view
of a subject, trying to see the phenomena or the process as
a whole, the inevitable limitations of science must be borne
in mind. If all Animate Nature is the outcome of a few
Protists, we must see these in the light of the evolution as
a whole. " The true nature of the antecedents, that is to
say, of the apparent cause, is revealed only in the effects '
(Pringle-Pattison, 1917, p. 332) ; or should one not say the
full nature? If we believe that Tyndall's " matter " (Brit-
ish Association Address, Belfast, 1874), with its famous

18 THE UNFATHOMED UNIVERSE

" promise and potency of all terrestrial life ", is exhaust-
ively described in terms of the dynamics of particles, then
we cannot by any ingenuity evolve the conscious out of it;
if on general grounds we feel bound to regard conscious life
as evolved from Tyndall's " matter ", then the reality of that
" matter " could not be exhaustively described in terms of the
dynamics of particles.

' All explanation of the higher by the lower is philosoph-
ically a hysteron-proteron. The antecedents assigned are
not the causes of the consequents, for by antecedents the
naturalistic theories mean the antecedents in abstraction
from their consequents the antecedents taken as they ap-
pear in themselves, or as we might suppose them to be if
no such consequents had ever issued from them. So con-
ceived, however, the antecedents (matter and energy, for ex-
ample) have no real existence they are mere entia rationis,
abstract aspects of the concrete fact which we call the
universe ' (Pringle-Pattison, Mans Place in the Cosmos,
pp. 11-12).

(/) The aim of science is not so much " to give an ac-
count of the whole matter ", as used to be said, but rather to
work out, patiently and piecemeal, a number of descriptions
and formulations of diverse aspects, each for a certain pur-
pose, by certain methods, in certain symbols. The chemist's
account of a peacock's tail is an abstraction, and so is the
physicist's, the biologist's, and the psychologist's. But even
when all these results, reached by scientific abstraction, are
pooled, we have not " an account of the whole matter "
of " the positive full-orbed reality ". That correlation often
has to wait for genius. Moreover, the scientific synthesis, if
it be achieved, requires to be assimilated with what the
artist, the poet, and the genuine lover of birds may be able

THE UNFATHOMED UNIVERSE 19

to tell us concerning the peacock's tail. Huxley's de.-la ra-
tion that the advance of science is .-ynnnynmus with de-
scription in materialistic symbols, assumed too readily thai
formulations which give Man a considerable power of predic-
tion and a considerable degree of practical control arc there-
fore theoretically exhaustive.

t/

(g) But let us consider further limitations. \\Y de-
scribe what goes on around us or within us in the simple-t
possible terms, but the fundamental concepts we use are
notably in process of development. As Kirchhoff said, It
is thinkable that a description which to-day is the simplest
that can be given may in the further development of science
be replaced by one still more simple." It is also thinkable,
we may add, that some of our present-day formulations will
turn out to be too simple, for abstraction often leads to fal-
lacy. This at least is certain, that when we describe oc-
currences in terms of matter and energy, life and mind, or
any similar grand concepts, we are working with what can-
not be called self-explanatory. Every one of them is big
with mystery, though some are in process of simplification.
Much so-called ' explanation ' is reducing unusual unintel-
ligibility to order rather than to radical understanding.
No achievement in science has been more satisfactory than
the Law of Gravitation, but can any one tell what actuaily
happens in the unseen universe when the apple falls in the
orchard? In language which is a survival we still speak of
the force of gravity, the force of attraction, and so on, but
we know that forces as causes do not exist. The earth does
not pull the stone, the stone gravitates to the earth. Some
have proposed to speak of bodies 'tractating' and ; p. Hat-
ing ' instead of saying that they attract or repel one another.
But, as Professor Soddy says, " Why two bodies tractate or

20 THE UNFATHOMED UNIVERSE

pellate is not known in a single instance, least of all per-
haps in the oldest recognised case, gravitation ' (Matter
and Energy, pp. 111-12).

We know of over eighty elements and much about many
of them, but do we know what being an element, like Mer-
cury or Antimony, really means, or the import of their
periodic classification ? Great libraries are filled with our
descriptions of the structure and activities of plants and
animals, but do we know what livingness essentially is ?
We cannot define it at present in terms of anything else^ we
take it as ' given \ We cannot tell wherein consists the
essential difference between the flight of a bird and the
movement of a comet. How much, relatively speaking, is
known of ( mind ' and ' body ', how little is known in regard
to the relation between them, if there is a relation !

(/&) We hear much of the achievements of science in
tracing things back to their beginnings. That is the histor-
ical or genetic method, and it yields very interesting results.
The present becomes more intelligible in the light of the
past. But, when we get far back, how mysterious the be-
ginnings become. How mysterious still, to tell the truth,
are many of the big steps between the beginning and the
end ! In the inorganic sphere one collocation passes into
another, usually without jolts. The course runs smoothly.
But when we pass to organic evolution or even to individual
development, we are almost driven back to a belief in magic !
Who can tell even in the sketchiest fashion how a Silver
Wyandotte was evolved from an Indian Jungle Fowl, or
how stage gives rise to stage as the chick develops in three
weeks from a minute transparent spot on the top of the yolk
of an egg?

Matter has seemed to many easy-going minds a firm

THE UNFATHOMED UNIVERSE 21

basis to start from, but what is matter, and what has been
its history? Must there not have been a differentiation of
various forms of matter, may there not have been a pre-
material state of things, do we ever get to beginnings ? This
necessary limitation is well stated by Dr. Arthur Shipley :-
" ]STo body of scientific doctrine succeeds in describing in
terms of laws of succession more than some limited set of
stages of a natural process; the whole process if, indeed,
it can be regarded as a whole must for ever be beyond
the reach of scientific grasp. The earliest stage to which
science has succeeded in tracing back any part of a sequence
of phenomena itself constitutes a new problem for science,
and that without end. There is always an earlier stage and to
an earliest we can never attain. The questions of origins
concern the theologian, the metaphysician, perhaps the
poet" (Schuster and Shipley, 1917, p. 276).

(i) Another limitation has to do with causal sequences.
In ordinary scientific discourse, as Bergson points out, three
different meanings of the term i cause ? are common. A
cause may act by impelling (one billiard ball striking an-
other), or by releasing (a spark exploding the gunpowder),
or by unwinding (the relaxing of the spring turning the
cylinder of a gramophone and having the melody as effect).
Now " only in the first case, really, does cause explain
effect; in the others the effect is more or less given in ad-
vance, and the antecedent invoked is in different degrees,
of course its occasion rather than its cause ' (Creative
Evolution, English Trans., p. 77).

In the domain of mechanics, in Gravitational Astronomy,
we see the high-water mark of scientific description, in exact-
ness and approximate completeness. There, with a clear in-
tellectual conscience, we can proclaim, " causa a?quat effec-

22 THE UNFATHOMED UNIVERSE

turn " ; for why, the resultant is just another form of the
components. In the great majority of cases, however, where
there is a qualitative change, we know that a given colloca-
tion of matter and energy gives rise to another, and does
so uniformly, but we cannot tell why the resultant must be
as it is and not otherwise. In the great majority of cases all
that science can say is, " If this, then that " ; and it is a
very useful thing to be able to say.

Every one knows that oxygen and hydrogen will unite vio-
lently to form water, but all that we can say is that it is their
nature to. Perhaps it may be explained as due to " the in-
terplay between electricity and matter ", and then we shall
shift the pegs of our claim in the desert of ignorance.

We rub our eyes and say: " But surely it is the very
business of Science to show how things happen, to explain
occurrences." So in a sense it is, but as Professor Stout
puts it, " What is really done is to show that a given result,
often called an effect, is part of a continuous process which
includes a known antecedent, often called the cause." In-
deed, " the current scientific conception of a cause ' is the
' totality of the conditions in the presence of which an event
occurs and in the absence of any member of which it does not
occur" (Taylor, 1909, p. 170).

(/) Finally there is a sense in which science, if not
asymptotic, is bound for a long time to remain approximate.
The Universe is still unfathomed.

(1) A scientific law formulates an observed routine in
the order of nature, but sometimes it is only a provisional
i fit '. Residual phenomena emerge which lead to restate-
ment. So Kepler improves on Copernicus, and Newton on
Kepler.

(2) Even when the ' fit ' of the formulation is more

THE UNFATHOMED UNIVERSE 23

than approximate, extension or intensification of inquiry
may show that it does not apply beyond certain limits. Thus
the law of gravitation, which must be very near to perfect
accuracy when applied to planetary distances, may not hold
either for very minute molecular distances or for immense
stellar distances.

(3) Even generalisations that work well and must bear
a close correspondence to reality, since they afford a basis
for effective prophecy, may require some modification, in
their setting at least, in the light of some new fact or idea,
of great magnitude. Thus Prof. Frederick Soddy writes :
" It sounds incredible, but nevertheless it is true, that
science up to the close of the nineteenth century had no sus-
picion even of the existence of the original sources of natural
energy. . . . The vista which has been opened up by
these new discoveries [of the radio-active properties of
some substances] is without parallel in the whole his-
tory of science ' (Harper's Magazine, December, 1909, p.
53).

(4) We cannot pass over the caution suggested by the
Michelson-Morley experiment, which showed that scientific
observations cannot transcend the system in which they are

- immersed. In Prof. Wildon Carr's words, " It showed us
that observers within a system of reference, in uniform move-
ment of translation relatively to other systems, have no
absolute standard by which they can determine their move-
ment. There is no absolute ether, no absolute space, and no
absolute time, by reference to which we can determine our
movements" (1918, p. 21). And Prof. Max Planck
writes of this new idea of the relativity of time: With
the revolution which it brings about in our conception of
the physical universe, no other is comparable, in range

24 THE UNFATHOMED UNIVERSE

and profundity, except that due to the introduction of the
Copernican Astronomy."

(5) Finally, it may be useful to remember that, accord-
ing to current and probably well-warranted scientific belief,
there was once a time when what happened upon the earth
might have been formulated in its immediacy with apparent
exhaustiveness in terms of the dynamics of particles. But
that cannot be said now. New aspects of reality have in
the course of ages ' weljed up ' and required new sciences.
We know, too, as we say, the ends of processes which in
azoic days had only begun. And yet we are not sure that
we know any ends (in the sense of goals), for the process
continues. Science seems bound to be not only approxi-
mate but asymptotic, for its subject-matter continues to
evolve.

One may have a more or less wholesome dislike of per-
petual-motion mongers and their successors, but one resents
scientific absolutism which will consider nothing that seems
to infringe a law. For these laws, beyond those of mathemat-
ics, are not more than summations of experience in a certain
limited here and now. The Uniformity of Nature which
the legalists hold over us as a sacrosanct principle is a big
assumption. For who shall define its tenure in a world of
seonic flux?

We should remember, too, how thickly beset we are with
unsolved problems of a less ultimate nature. What, for in-
stance, is the commonest and most universal vital event?
It is cell-division. And though the literature about it would
fill a large library, we do not yet know the conditions of its
occurrence or the forces at work in its accomplishment!
When we succeed in stating a problem in a clear way it is
gratuitous to speak of it as insoluble, but of the number of

THE UNFATHOMED UNIVERSE 25

unsolved problems and of the way in which the solution of
one raises another, every one is aware.

For the reasons we have indicated in this discussion and
for others, there are many, in this age of extraordinarily
rapid scientific discovery, who stand wondering before an
unfathomed universe. We have made many charts, but
there is still more sea. Perhaps one of the most hopeful
signs at once of the progressiveness of science and of it-
conformability "with the humanities and philosophies is in
its vivid realisation of its own limitations.

From the absence of a scientific answer to a scientific
question, we do not dream of arguing, as has been often
argued, that some other kind of answer, say theological,
must be true. We have to render to Cresar the things that
are Cassar's; and there is no exchange between scientific and
transcendental coinage. But what we may usefully recog-
nise is the self-imposed limitation of science, that it seeks,
for certain purposes and by certain methods, to describe
occurrences and processes in the simplest possible, universally
verifiable terms, and that it does not pretend to exhaust their
reality. This leads us to recognise the validity of feeling in
an interpretation of Nature.

5. The Function of Feeling in our View of Nature.

The world without has played a great part in the educa-
tion 'of the human spirit. Its enigmas have quickened Man's
intelligence; its practical problems have trained his will;
Animate Nature in particular has been a school of feeling;
the mother's face has been a factor in the evolution of per-
sonality (see Merz, 1916). In her manifold opportunities
Nature has thus helped man to polish the mirror of his mind,
and the process continues. Nature still supplies us with

26 THE UNFATHOMED UNIVERSE

abundance of brain-stretching theoretical puzzles and we
eagerly tackle them; there are more worlds to conquer and
we do not let the sword sleep in our hand ; but how does
it stand with feeling? Nature is beautiful, gladdening,
awesome, mysterious, wonderful, as ever, but do we feel it
as our forefathers did ?

What is this feeling for Nature? It may be a -simple
restfulness, such as Darwin once spoke of when for the
moment he laid aside his questionings ; it may be a keen
aesthetic joy; it may be the thrill of a starry night; it may
be the pleasure of seeing trust and affection in a dog's eyes ;
it may be the response our heart makes in spring when we
hear the wild geese passing overhead on their northward
migration, and know that another winter is over and gone;
it may be that deep calls to deep, and we have a vicarious
share in life's triumph over matter; it has often expressed
itself in reverent worship ; it may be an awed elation in
finding ourselves part of so sublime a process as cosmic
evolution. This element of feeling in our outlook on Nature
is a satisfaction in itself, but our plea for allowing it to
operate in our interpretation of Nature is that we get
closer to some things through feeling than we do through
science. Just as feeling contributes to our total appreciation
of people, so of Nature. Through feeling we discern what
science cannot get into focus. Not that any one dreams of
mingling feeling with science or of attempting to eke out
science with feeling, but to try to exclude feeling from our
total view of Nature is to try to close one of the right-of-
way paths to reality. Goethe went the length of saying:
" Sympathy and enjoyment in what we see is in fact the
only reality, and, from such reality, reality as a natural
product follows. All else is vanity."

THE UNFATHOMED UNIVERSE 27

In the preface to his Diversions of a Natunil/sf ( i:>i:,,
p. vi), Sir Ray Lankester, who has so greatly enriched
Zoology, speaks in a very interesting way of the value of
science in giving us prevision and control, but goes on to
say: " Science commends itself to us as does Honesty and
as does great Art and all fine thought and deed- -not as a
policy yielding material profits, but because it satisfies man's
soul." This is very different from the old moan that increase
of knowledge is increase of sorrow, and surely nmro \vlmli-
some, but we wonder if it is true. Is it science that satisfies
man's soul, or is it the attendant feeling and imagining
which the study of Nature evokes ?

There have always been men of science, tough-minded
by birth, to whom an enthusiasm for natural knowledge has
been in itself enough, who have asked for no satisfaction
from either faith or feeling; and the world owes much to
their preoccupation. But this has not been true on the
whole ; the unsatisfyingness of an exclusively scientific view
of Nature has been confessed age after age.

In the ages of the empirical order Man had his imaginative
constructions of early magic and of early animism. These
were attempts to eke out very imperfect understanding and
very imperfect control of Nature, but they were also sops
to feeling. The replacement of the empirical order by the
scientific order was great gain. It meant a less beclouded
intellectual sky and a greatly increased mastery of natural
resources. But with the gain came loss, for the reconstruc-
tions of science are austere, not home-like to the human spirit.
The creations of early days the attractive elves as well
as the repellent gnomes were scattered by the growing light
of science, save a few which found refuge and here and
there still linger in the caverns of Man's mind. There is

28 THE UNFATHOMED UNIVERSE

no doubt that the scientific method is antipodal to feeling, and
that scientific methods and systems are almost hostile. So we
tend to get further away from " an original relation to
Nature ", such as many children have, such as Emerson re-
ferred to when he said : " The earlier generations saw God
face to face ; we through their eyes. Why should not we also
enjoy an original relation to Nature ? '

It might be thought that the more science grows the more
feeling should deepen. " All knowledge," Coleridge said,
" begins and ends with wonder, but the first wonder is the
child of ignorance, while the second wonder is the parent
of adoration." Truly progressive science should enrich our
feeling, for it gives to our vision depth, order, connectedness,
and continuity, and makes the whole world more translucent
and more full of meaning. But we have, after all, to admit
that the light of science is as cold as it is clear. Keats was
right in lamenting that the rainbow had never been quite
the same, in spite of what Wordsworth said, since Newton
looked at it with his discerning eye. No doubt that for any
wonder Science dissipates, she gives us twain ; but they are
not the old homely wonders. No doubt, though Science is
ever pushing the curtain back a little further, so that half-
wonders disappear, the wonder remains. But the funda-
mental mysteriousness of Nature is cold comfort for the
loss of the wonder of the rainbow and of the Northern Lights,
of the flower in the crannied wall and of the way of the
eagle in the air.

The fact is that it is rather the scientific mood than science
that is opposed to feeling. For the eyes of the investigator
have neither laughter nor tears. In the actual work of
science, emotion is dangerous. For scientific purposes we
must look out of one window only and with all possible con-

THE UNFATHOMED UNIVERSE 29

centration. It has been said, though it is a dangerous half-
truth, that the worst kind of comparative psychologist is
the observer who is devoted to his animals.

Especially since Darwin's day, we have been learning
in biology to see creatures in their spatial and temporal
linkages, but it cannot be denied that the predominant
method of science is analytic and deliberately abstract,
whereas the tendency of feeling is always to see things whole
-synoptically. As Goethe said, " these dissecting opera-
tions, ever and ever continued, produce likewise many a
disadvantage; the living is indeed analysed into elements,
but it cannot be brought together again out of them and
animated ". Compared with the biologist's insight the shep-
herd's outlook is superficial, but unless the biologist can
reconstruct and reanimate he has lost that view of things,
in their totality which the shepherd has. We may have a
profound knowledge of the life-history of a creature and
yet fail to get that imaginative vision which the authors of
Animal Biographies have with less material made their own.

In the attempt to conserve what is reached through feeling,
to which Man instinctively tries to hold firm, satisfaction
has been sought in Nature-poetry, in symbolism, in Natural
Theology, or in an idealisation of Nature in a religious halo.
These avenues of satisfaction, these pathways to reality,
for the two phrases mean much the same, remain happily
open to many. To others, however, they are closed, partly
because of the austerity of the scientific mood and partly
because there is a lack of correlation. Thus much Nature-
poetry is too like antiquarian or reminiscent architecture,
evading the problem of idealising the present in offering us
constructions whose beauty makes us forget for the time
that they are anachronisms. Similarly, the spiritualisations

30 THE UNFATHOMED UNIVERSE

offered by philosophy and by theology have often seemed
unconvincing because imposed from without, instead of aris-
ing in minds saturated with the actualities of the case. It
goes without saying that there have been poets, philosophers,
and theologians who have seized on the universal elements
in Nature which are for all time. It is also obvious that
Nature-poems may be literary treasures though they are no
longer significant to us in our world-outlook. But what
we want to get at is simply this: What counteractives or
compensations may there be for those in whom the scientific
mood is strong, in whom neither Nature-poem nor ancient
Theodicy, neither philosophical idealisation nor fairy tale
finds satisfactory organic response.

To conserve the feeling for Nature at once a satisfaction
and a clue we may get what aid we sincerely can from
Nature-poetry and other idealisations, we may give greater
breadth and depth to our vision by more science, we may
exercise ourselves in scientific reconstructions till the Dryad
comes back into the tree, but all these are vanity unless we
keep close to the concrete realities themselves, and receive
with open minds the great primal impressions of immensity,
flux, order, intricacy, and beauty, not refusing to be thrilled
by what seemed to our more naive predecessors to be immedi-
ately divine.

There is grandeur in the spectacle of the star-strewn sky,
so apparently crowded, but there are thousands of worlds
unseen for every one our unaided eyes can image, and yet
the astronomers tell us that the emptiness of space is its
most striking characteristic. We are staggered by the fact
that when we look at a Centauri, which lies some ten billions
of miles nearer to us than any other known star, we see it,
not as it is to-night, but as it was four years ago. We have

THE UNFATHOMED UNIVERSE 31

no mental picture of the remoteness of the sun, which is
the earth's ' mother-country ', but if the sun were repre-
sented in a model by a grain of sand one-hundredth of an
inch in diameter, and the earth by a quite invisible speck
one inch away, the nearest star would be represented on
this scale by another grain of sand some four miles off.
One knows indeed that size and distance are in a way the
least important distinctions in the world, but just as men
often lose their littleness in sojourning among the great
mountains, so it is part of the significance of things to us
that we belong to a system cast on big lines. We are citizens
of no mean city.

No one supposes that we are divided into scientific,
aesthetic, and other parts, and function in bits as it were;
or that there is an antithesis, like good and evil, between
science and feeling; or that there is any such thing as ' pure
perception '. As a matter of fact, as Professor Hitter says,
" We know-and-feel, all in one breath, whenever we respond
in an unsophisticated, natural manner to contacts with men
and things' (1911, p. 126). Deeper science may deepen
feeling, and deeper feeling may lead to deeper science. We
are inclined to agree with Hitter that " we cannot interpret
plant and animal life broadly and soundly either in technical
science or in common intelligence unless the aesthetic side
of our nature joins with the intellectual side in determining
our attitude toward the beings we deal with." Progress is
to be looked for in correlated, not dissociated development.
There is no question of allowing feeling to influence our cal-
culations or measurements, for the scientific accounts an-
open to public inspection and are fortunately audited with
severity. But we need not think that the ark of science IKH
such an unstable equilibrium that a touch of imaginative

32 THE UNFATHOMED UNIVERSE

insight will upset it. There is no question, on the other
hand, of admitting into our feeling for Nature any element
that is incongruent with our intellectual experience. That
way lies sentimentalism or worse. But we need not be too
timorous in our anthropomorphism or afraid of exaggerating
the wonder and subtlety of Nature. We cannot, for our
life's sake, and for the sake of our philosophical reconstruc-
tion, afford to lose in scientific analysis what the poets and
artists and the lovers of Nature all see. It is intuitively
felt, rather than intellectually perceived, the vision of things
as totalities, root and all, all in all; neither fancifully, nor
mystically, but sympathetically in their wholeness. There
is a deep wisdom in Wordsworth's remark in one of his
Prefaces: " Poetry is the breath and finer spirit of all
knowledge; it is the impassioned expression which is in the
countenance of all science."

To all those who remind us what " a dubious and vary-
ing oracle ' feeling has proved to be in the past, we would
answer, " But how often a wise counsellor ! ' In an exalted
mood many have in the light of feeling made decisions from
which the happiness of a lifetime flowed, and it was a
wise man who declared that great ideas come from the heart.
We mean by feeling in its finer expression the lamp which
others have called intuition. It goes out if not tended, and
if facts do not form part of its oil the flame will sputter.
But it is a light in the region ( beyond science '. As M.
Bergson writes, " Sur notre personnalite, sur notre liberte
. . . sur notre origine et peut-etre aussi sur notre destinee,
elle projette une lumiere vacillante et faible, mais qui n'en
perce pas moins 1'obscurite de la nuit ou nous laisse P in-
telligence."

The words " The Unf at homed Universe ", used in the title

THE UNFATHOMED UNIVERSE 33

of this lecture, were suggested by Walt Whitman's well-
known line " Prais'd be the fathomless universe, for life
and joy, and for the objects and knowledge curious." Whit-
man assuredly strikes the right note that of the joyous
adventurer sailing into opulent seas unexplored. Wherever
in the past he has sounded he has touched treasure, he looks
forward to winning the secrets of deeps still unfathorned.
Experience never disappointed surely warrants a feeling
of expectancy, an impression of inexhaustible riches " these
immense meadows, these interminable rivers ", horizon be-
yond horizon, which are ours, here and now, to seek to
appropriate.

The climax of intuition is mysticism, and those of us
who do not practise it must not brush it hastily aside. Many
mystics are precise and logical thinkers though they ex-
plore a kingdom beyond science and logic. Some psycholo-
gists have suggested that in conditions of quiet or of exalta-
tion, as in the presence of fine scenery, there may enter into
the focus of consciousness some larger area of the unconscious
mind than is usual in ordinary life. Others believe that
the mystic is thrilled by extra-human influences. All that
we plead for is a recognition of the fact that practical men
and women of to-day do still manage to get into an original
relation with Nature. In his Candle of Vision (1918), A. E.
writes :

" I draw attention to the mystery in common and obvious things,
and ask that they be explained and not slurred over as if no explana-
tion were necessary. I ask the doubters of my vision to penetrate
a little into the mystery of their own thoughts and dreams before
they cry out against me, who for many years travelled far and
came upon lovely and inhabited regions to which I would also lead
them. I know that my brain is a court where many living crea-
tures throng, and I am never alone in it. You, too, can know that,

34 THE UNFATHOMED UNIVERSE

if you heighten the imagination and intensify the will. The dark-
ness in you will begin to glow, and you will see clearly, and you
will know that what you thought was but a mosaic of memories is
rather the froth of a gigantic ocean of life, breaking on the shores
of matter, casting up its own flotsam to mingle with the life of the
shores it breaks on."

And speaking of the concentration required in the habit of
vision, he says : " It is an exercise this, a training for higher
adventures of the soul : it is 110 light labour. The plough-
man's cleaving the furrows is easier by far. Five minutes
of this effort will at first leave us trembling as at the close
of a laborious day."

Surely students of science should be the last to dogmatise
as to the possibilities of this life of ours.

6. Towards a Philosophical Interpretation of Nature.

As the scientific order transcends the empirical, it is tran-
scended in turn by a philosophical order which aims at a
harmonious interpretation of our experience as a whole. The
essential change is often referred to as passing from the
' how ' to the ' why ? , from analytic and historical description
to interpretation, but there is also this difference that while
science must keep feeling at an arm's length, philosophy
seeks to give a view of the world that will satisfy the claims
of feeling as well as those of the understanding. It is just
our outlook on the whole of life, the world within as well
as the world without, and it includes the assets of feeling
as well as intellectual gains.

To illustrate concretely : biologists are easily satisfied with
their outlook on animate nature if they are willing to leave
out of account the fact of human personality at its best,
or the fact of human society. We may define our biology

THE UNFATHOMED UNIVERSE 35

so as to exclude them, that is a question of method, but
to think of leaving them out in our total interpretation of
our experience is to allow the light that is in us to he
darkened. Similarly, although there is great difference of
opinion in regard to the philosophy of the beautiful, there
is general agreement that our total outlook on Nature is
to be distrusted if the fact of beauty has been ignored.
Feeling is to be excluded from scientific investigation, but
it must be allowed to operate in our philosophical synthesi-.
Perhaps we may say that feeling supplies the mortar in
which are laid the stones contributed by Natural Sci< un-
to the (synoptic) edifice which the genius of Philosophy is
building.

There are several hopeful indications of an advance
towards a philosophical order of Nature. The first is the
increasing correlation of the sciences, which are parts of
one endeavour to understand the order of Nature and Man's
life in its midst. The sciences work into one another's hands
in correlation, and this has always been fruitful, as is well
illustrated by the transforming and vitalising of chemistry
after it joined hands with physics. The scientific study
of animal behaviour, still in the freshness of its youth, shows
us the effectiveness of a combined attack psychological and
biological on a difficult set of problems. The autonomy
of biology is not inconsistent with its correlation imperium
in imperio with chemistry and physics on the one hand
and psychology and sociology on the other. While the
sciences are separated off for the sake of clearness, because
they pursue different methods, use different tools, and sum
up in different kinds of formula?, they work into one another's
hands, and they are simply different modes of one rational
inquiry. Their mutual influence is increased, not decreased,

36 THE UNFATHOMED UNIVERSE

when each recognises its abstractness ; and the hope of their
leading on to a philosophical order is in proportion to the
clearness with which it is recognised that a synthesis is not

additive.

It is customary to speak of the unity of the sciences, and
no doubt they are beginning to form a system or hierarchy,
but the ideal of one science of Nature the ideal of Descartes,
of Hobbes, of Leibniz is giving place to an ideal of cor-
relation rather than of unity. There has been much profit-
able breaking down of artificial partitions, much fruitful
co-operation of several sciences on one problem, many a use-
ful discovery of a common denominator bringing apparently
disconnected facts into comparable relationship, but the
materialistic proposal to make physiology a branch of
physics, and psychology a branch of physiology, has not been
substantiated. Biology and Psychology remain autonomous,
with categories of their own. Treating of the work of science,
Prof. A. E. Dolbear writes : " By explanation is meant the
presentation of the mechanical antecedents for a phenomenon
in so complete a way that no supplementary or unknown
factors are necessary." If that kind of explanation were
feasible throughout, there would be one science of Nature,
in terms of ideal motions, expressible in mathematical
formula But this is false simplicity; it does not really
work. Thus, to take a clear case, in the higher reaches of
animal behaviour, most biologists admit the necessity of
invoking other than mechanical factors.

The second hopeful sign we have already referred to, the
frank recognition on the part of science that it is not its
role to solve the riddles of 'the universe. It remains more
or less open to students of science to deny the feasibility
of any solution and to doubt the value of any generalisations

THE UNFATHOMED UNIVERSE 37

save those called scientific, but there has been perfect open-
ness in the retreat from the position of world-interpretation.
No longer should it be possible to ask, as the title of a not
very ancient book does, " God or Natural Selection?", for
that is opposing an interpretative concept to a descriptive
formula, in short, trying to talk two languages at once.

The third hopeful sign, as it seems to an outsider, is a
change on the part of Philosophy in its relations with Science.
There is a growing recognition that Philosophy must use in
her characteristically interpretative reconstruction all the gen-
eral results of the sciences. The Procrustean attempt to force
the facts of Nature to fit a premeditated abstract intellectual
scheme is not more promising than the antipodal attempt
to wring a philosophical system out of Nature alone. The
reaction of Lotze from Schelling may serve as a diagrammatic
illustration of what is now taking place in our midst ; that
philosophy is using the best that science can give, and is
systematising that along with the other winnings of the de-
veloping human spirit.

Prof. A. E. Taylor gives (1909, p. 192) a luminous
statement of the relation between science and philosophy :

" The work of the Philosophy of Nature and of Mind only begins
where that of the experimental sciences leaves off. Its data are not
particular facts, as directly amassed by experiment and observation,
but the hypotheses used by experimental science for the co-ordina-
tion and description of these facts. And it examines these hypoth-
eses, not with the object of modifying their structure so as to in-
clude new facts, or to include the old facts in a simpler form, but
purely for the purpose of estimating their value as an account of
ultimately real existence. Whether the hypotheses are adequate as
implements for the calculation of natural processes is a question
which Philosophy, when it understands its place, leaves entirely
to the special sciences; whether they can claim to be more than
useful formula for calculation, i.e., whether they give us knowledge

38 THE UNFATHOMED UNIVERSE

of ultimate Reality, is a problem which can only be dealt with by
the science which systematically analyses the meaning of reality,
i.e., by Metaphysics. We may perhaps follow the usage of some
recent writers in marking this difference of object by a difference
in terminology, and say that the goal of experimental science is
the description of facts, the goal of Metaphysics their interpretation.
The difference of aim is, however, not ultimate. Description of facts,
when once we cease to be content with such description as will sub-
serve the purpose of calculation, and call for the description of the
fact as it really is, of itself becomes metaphysical interpretation."

Along with the sympathetic interest that many modern
philosophers (such as Ward, Royce, Pringle-Pattison, Stout,
Taylor, Lovejoy, Bergson) have taken in the general results
of science, there is benefit accruing to science through their
expert criticism of scientific categories. For the mood
and training of the scientific investigator is rarely such
that it leads far in that direction. Some of the ablest
scientific minds the world has known have betrayed in
their would-be philosophical deliverances an extraordinary
naivete.

In thinking of the empirical, scientific, and philosophical
orders as reconstructions of increasing completeness and,
it is hoped, of increasing nearness to reality, it must be re-
membered that they co-exist in our midst like outcrops of
strata of different epochs. Thus we have little more than
empirical knowledge in regard to the variability of living
creatures, or in regard to certain obscure diseases. In med-
ical practice, stock-breeding, and engineering, empirical
knowledge has often worked extraordinarily well. The ex-
planation is sometimes diagnostic genius, sometimes remark-
able development of perception in quite ordinary individuals.
A patiently accumulated working knowledge often leads a
shrewd man a long way without much science in the strict

THE UNFATHOMED UNIVERSE 39

sense. Similarly there are many who have established for
themselves scientific order over large areas, but have not
sought to correlate it with other parts of their experience,
thus failing of philosophical endeavour. And others who
seek do not find. Similarly, many scholars who have a
philosophy of history have neither a philosophy nor a science
of Nature. It is to be recognised, then, that the empirical,
the scientific, and the philosophical order co-exist in us and
in our midst.

Another note may be permitted. It has often been pointed
out that progress in intellectual construction is correlated
with mastery of environing conditions. As compared with
the early working knowledge, the scientific order meant in-
creased control of Nature, and as science has grown our
mastery has widened and deepened. We have only to think
of the successive harnessings of wind, water, steam, and elec-
tricity. Preventive medicine and hygiene, the arts of agri-
culture and breeding are good instances of the passage from
control of the inorganic to the control of organisms. When
we look around and see how much men suffer from a par-
tiality of view that is remediable and from philosophies
which are discreditable, is it too much to hope that the grow-
ing philosophical order is going to lead us to an increased
control of the higher issues of life an aid which Religion
will be unwise to refuse ?

7. Science and Religion.

Science is frankly empirical in method and aim ; it seeks
to discover the laws of concrete being and becoming, and to
formulate these in the simplest terms, which are either im-
mediate data of experience or verifiably derived therefrom.
The scientific ' universe of discourse ' docs not include tran-

40 THE UNFATHOMED UNIVERSE

scendental concepts; its aim does not include attempting to
give ultimate explanations.

Religion has been described as the orienting of our life
towards the True, the Beautiful, and the Good. But this
does not grip ; it leaves out the essential the mystical ele-
ment. Religion in essence always implies a recognition
practical, emotional, and intellectual of a higher or deeper
order of reality than is reached in sense-experience. It means
the recognition of an unseen universe, which throws light on
the riddles of the observed world a light which may give
aid. In the scientific light of common day are seen the
hosts of the Assyrians encompassing the city; the opened
religious eye sees the mountains crowded with the chariots
of God.

But let us quote an authority. Prof. D. S. Cairns writes
(1918, p. 21) : " Religion is, fundamentally, on the human
side, man's protest and appeal to the Supreme against the
sorrows, indignities, and sins of this present world. It is
the endeavour of man, through that appeal, to unite him-
self with the life of that unseen and ruling world, and so
to win the power from it to dominate and transmute the
life of time. That is to say, in essence, religion, on the
human side, is simply the sustained endeavour to meet this
great human problem of the destroying Nature and the
struggling personality. All religions have this at their heart.
They, one and all, start from an act of faith in an unseen
world which is mightier than the world of sense and time,
and which is either already friendly or may be made friendly
to the worshippers." He goes on to say that in all religions
there may be recognised three great constant elements the
conception of an unseen ruling world, some idea of the
supreme good which the worshipper may derive from Heaven

THE UNFATHOMED UNIVERSE 41

for the enhancement of his life, and some way or means
of uniting the worshipper with God or the gods.

It is evident, then, that the religious language is not the
scientific language, and that it is impossible to intermingle
the two. The religious concepts are different and apparently
more metaphysical ; their aim is interpretation rather than
description. In short, science and religion are incommen-
surables.

But to call religion and science ' incommensurables ' is
not to fall back on the old-fashioned impossible device of
having idea-tight compartments. Just as a novel scientific
generalisation is not incorporated in our scientific system
unless consistent with previously established conclusions, or
unless the latter can be adjusted to meet the new idea har-
moniously, so at a greater height, where philosophical dis-
cipline is invaluable, a religious idea, such as that of a Divine
Creator, must be congruent with the rest of our world-picture,
e.g., with the idea of evolution. It is the criterion of con-
sistency that saves from superstition.

Men are led to religion along many pathways from the
perplexities of the moral life, from an appreciation of
the facts of history, and from the experience of reaching the
limits of practical endeavour, of emotional expression, and
of intellectual inquiry. When we think of the last-named
three pathways to religion, which many tread, through
baulked struggle, over-strained emotion, and baffled search
after clear understanding, we can see why the rapid devel-
opment of science should, for a time of transition at least,
work against religion. For science gives Man from time to
time a greatly increased mastery over Nature; science, with
its analytical triumphs, ever tends to diminish, in the shallow-
minded, the saving grace of wonder; and science is ever

42 THE UNFATHOMED UNIVERSE

dispelling the darkness that oppresses the mind. Moreover,
the scientific mood, inherently sceptical, has been widely dif-
fused ; its activity has a growing fascination of its own ; it
easily comes to preoccupy the mind, and thus tends to
crowd out the aesthetic, the poetic, and the religious moods.
And yet we believe that religious interpretation and scientific
analysis are equally natural and necessary expressions of the
developing human spirit.

When we are thrilled with the wonder of the world, the
heights and depths of things, the beauty of it all, we approach
the door of natural religion. And when the Nature-feel ing
is not superficial but informed with knowledge, with no gain
of the hard-won analysis unused, we may reach the threshold.
And when we feel that our scientific cosmology leaves Isis
still veiled, and when our attempts at philosophical inter-
pretation give us a reasoned conviction of a meaning behind
the process, we may perhaps enter in. That the entrance is
not easy is shown by the unhappy prevalence of a profane
world-outlook outside the ranks of disciplined thinkers and
investigators, on the one hand, and religious, poetical, and
artistic lovers of Nature on the other. The difficulty of the
entrance is partly due to race, for North Temperate peoples
with no Celtic strain never find religion easy, partly due
to preoccupation either with the good things or with the
thick shadows of this life, and partly due to a misunder-
standing of the results of science. It is the last hindrance
to religion that concerns us in this course of lectures.

What must be worked towards is a philosophical co-ordina-
tion of the essential results of Biology and the other sciences
with the results of intellectual inquiry in other fields and
by other methods, allowing at the same time for those
glimpses of reality that feeling alone affords. In this task

THE UNFATHOMED UNIVERSE 43

it is all-important that we get at the facts, for there are
in currency many conclusions in regard to Nature which
can no longer be accepted as well grounded. What we may
reach can only be provisional, for the data of science are
in process of rapid change; but there will be some reward
if we can eliminate some spurious and obsolete coinage.

Whatever be our philosophical interpretation or religious
conviction, we do well to have more than a passing acquaint-
ance with the world without, with the process of which
our life is part. The aim of this course is to state the
general results of biological inquiry which must be taken
account of if we are to think of Nature as a whole and in
relation to the rest of our experience. The first part of the
course will deal with the realm of organisms as it is so far
as its changefulness permits; the second, with its evolution,
past, present, and possible.

SUMMARY.

In primitive times man had a slowly growing recognition of an
empirical order of nature, a very imperfect control of natural
forces, and a theory of magic or of animism.

The empirical order has gradually given place to a scientific
order, ever broadening and deepening; and man's control of Nature
has increased in proportion. One science has been added to another
in elaborate specialisation, and there has also grown up a scientific
system or ' world-outlook ' which verges on philosophy. This world-
outlook has ceased to be geocentric or narrowly anthropocentric.
The reign of law and the process of evolution have been recognised.

The direct motives of scientific inquiry are, in the main, intel-
lectual curiosity, a self-preservative dislike of obscurities, a desire
after unity and continuity in our outlook. It is a quite specific
endeavour to get things under intelligent control, so that we can
think of them clearly in relation to the rest of our knowledge, and
so that we can act effectively on the basis they afford. The aim of
science is to describe natural phenomena as precisely as possible,

44 THE UNFATHOMED UNIVERSE

as simply as possible, as completely as possible, and as consistently
as possible. But this view of Laws of Nature as merely descriptive
formulae must not be exaggerated; the formulae often imply a great
deal of preliminary analysis and reduction, which is ' explanation '
of a sort ; they must be verifiable by all normally constituted minds ;
and that they bear close correspondence to the actualities of Nature
is shown by the way in which we use them safely in prediction.
Moreover, the descriptive formulations of science must, in relevant
cases, be followed by a historical or genetic account of the sub-
jects of study especially, of course, when we are working w r ithin
the boundaries of the realm of organisms.

The limitations of natural knowledge are great. We know Nature
only in the mirror of our minds; we are limited by our senses; we
cannot make scientific progress without taking partial or abstract
views, and the correlation of these is difficult; our fundamental con-
cepts (like 'matter/ 'energy/ ' organism ') are not self-explanatory,
but big with mystery; they are not final, but in process of develop-
ment; the law of gravitation is perhaps the finest example of a
far-reaching descriptive formula, but it does not tell us why the
apple falls to the ground; in some departments of science we try
to give historical descriptions or to trace genetic series, but we know
little of any beginnings; the world is full of unsolved concrete
problems thus such a common phenomenon as cell-division remains
in great part an enigma; there are hints of facts beyond our present
horizon; and so on. In an age of extraordinarily rapid scientific
discovery, we stand wondering before an unfathomed universe.

The world without has played an important part in the evolution
of the human spirit. Its enigmas have educated our intelligence;
its practical problems have trained our will; and in Animate Nature
in particular Man has found a school of feeling. In her varied
opportunities Nature has helped in polishing the mirror of our
minds in which we see her, and there is no reason to believe that
the polishing is finished. As regards feeling for Nature, however,
the scientific mood, now so dominant, is antipodal, and the scientific
systematisations may be actively hostile. Nature-poetry, symbolism,
Natural Theology, philosophical idealisations, and religious spiritual-
isations valuable as they may be to attuned minds fail in many
cases to find any satisfactory organic response, and the life of
feeling has been impoverished. Yet to try to leave feeling out in our
view of Nature is to try to close one of the right-of-way paths to

THE UNFATHOMED UNIVERSE 45

reality. To conserve this element of feeling, to which the analytic
mood of science is opposed, it is above all necessary to keep close
to the concrete realities themselves, keeping an open mind to their
influences. In this endeavour science may be of use, as a means of
culture rather than as an intellectual formulation, adding depth,
order, and connectedness to our vision. In the cultivation of feeling,
which requires to be kept well in hand, mental elbow-room must
be given to the fundamental impressions of immensity, flux, order,
intricacy, and beauty.

Movement towards a philosophical Order of Nature, i.e., towards
a harmonious interpretation of Nature along with the rest of our
experience, may be discerned in the growing correlation of the
sciences, in the re-definition of their aim (descriptive rather than
explanatory), in the aid that has been given to science by philo-
sophical criticism of its categories, and in the endeavour that is
increasingly made by philosophers to take the results of science
into their consideration. Perhaps it may be said that feeling
supplies the mortar in which are laid the stones contributed by
Natural Science to the edifice which the genius of Philosophy is
building.

When we are thrilled with the wonder of the world, the heights
and depths of things; when our Nature-feeling is informed with
knowledge; when our science leaves us with a conviction of the
mysteriousness of Nature the unfathomed universe; when our
philosophical outlook leads us towards a realisation of a meaning
behind the process; then there may be a total reaction on our part
worthy of the name of Natural Religion. To facilitate this reaction
by an accurate presentation of the facts is one of the objects
of this course.

LECTURE II.

THE EEALM OF ORGANISMS CONTRASTED WITH
THE DOMAIN OF THE INORGANIC.

LECTUKE II.

THE EEALM OF ORGANISMS CONTRASTED WITH
THE DOMAIN OF THE INORGANIC.

1. Things and Living Creatures. 2. The Characteristic Features
of the Realm of Organisms. 3. A Multitude of Individual-
ities, yet a Systema Natures. 4. Abundance and Insurgence
of Life. 5. Struggle and Sifting. 6. A System of Inter-
related Lives. 7. The Prevalence of Adaptations. 8. The
Pervasiveness of Beauty. 9. The Other Side of the Picture.
10. Resemblances between the Realm of Organisms and the
Domain of the Inorganic. 11. Contrasts between the Realm
of Organisms and the Domain of the Inorganic. 12. The
Suitability of the Inorganic to be the Basis and Environment
of the Organic.

1. Things and Living Creatures.

IN the concrete fulness of the world without, we distin-
guish by common consent the realm of organisms and the
domain of the inorganic. Sun and stars, sky and sea, moun-
tains and rivers, the air we breathe and the dust beneath our
feet, crystals and precious stones, it seems like colour-blind-
ness to sum this up in the negative and unattractive term
' inorganic \ But better that than use a question-begging
word.

We must not dogmatically say e inanimate ' Nature, for
it is making a sweeping assertion to declare that the inor-
ganic cannot have a meta-kinetic aspect. Nor is it quite
satisfactory to speak of ' the mechanical order of things ' , for
we ourselves illustrate mechanical principles, even when we
raise our arm or eyebrow in protest. Moreover, it cannot

49

50 THE REALM OF ORGANISMS CONTRASTED

be said that a mechanical summing up of even not-living
occurrences is necessarily exhaustive. Nor can we speak
with satisfactory precision of the ' physical order ' , for living
creatures are also physical systems, though more; and the
phrase f purely physical J is again question-begging.

So let us call it all from the solar system to the dew-drop
the inorganic domain. We cannot hold it rigidly apart
from living organisms, for it is continually undergoing mod-
ification at their hands. Parts of it are ever entering into
the bodies of organisms, and into its repository the disen-
chanted dust of life is ever returning. We know the inor-
ganic system of things only in terms of mind, and our first
adventure of scientific faith is to believe in its external
reality; yet it looms impressively over us a great dumb
giant, holding us, even in our defiance, in its grip and bear-
ing us with it on its stupendous journeying through space.

2. The Characteristic Features of the Realm of Organisms.

Let us begin with an impressionist survey of the realm
of organisms, and afterwards contrast this with a general
view of the inorganic domain. It is surely a magnificent
spectacle that the obviously animate presents. What a gamut
of life from the microscopic Infusorian to the giant whale,
from the hyssop on the wall to the cedar of Lebanon ! What
abundance of life is revealed when the dredge comes up,
or when the insects rise before us in a cloud as we walk
through the grassland of a warm country. What variety of
architecture, what abundance of individuality within the
same style ! All is suggestive of fertile imagination. How
strong the pressure, as the waves of life surge up against
their shores; how numberless the hand-and-glove fitnesses;
how subtle the linkages ; how constant the changef ulness ;

WITH THE DOMAIN OF THE INORGANIC 51

how universal the beauty! But let us be more analytic and
illustrate in due order the deeper impressions which fill the
mind after the crowd of details sinks to rest, for these must
form part of the materials which Biology gives over to
Philosophy to build with.

3. A Multitude of Individualities,, yet a Sy sterna Naturcz.

When we look at Nature with a fresh eye, in a new coun-
try, or in some novel experience such as dredging, we have
a transient impression of overwhelming confusion, as if
Aladdin's cave had been suddenly burst open before us.
Many miss this in ordinary circumstances because familiarity
breeds the contempt of inattention, and also because a very
large number of living creatures are cryptozoic. For every
conspicuous plant there are often a score inconspicuous, and
for every readily visible animal there must be a hundred
unseen. It is not of individuals that we are thinking, but
of individualities, of species. There are at least 25,000
named backboned animals, ten times as many named back-
boneless animals, and about as many plants. There are
about 100,000 Dicotyledonous Flowering Plants. Darwin
speaks of finding twenty different kinds of flowering plants
on a patch of turf four feet by three, and there may be as
many different kinds of animals on one stone brought up
from the sea-floor.

The study of marine animals has been enthusiastic and in-

/

tense for many years, but those who know most about it will
agree with what the poet Spenser said long ago :

" But what an endlesse worke have I in hand,
To count the seas abundant progeny,
Whose fruitful seede farre passeth those on land,
And also those which wonne in th' azure sky ;
For much more eath, to tell the starrcs on hy,

52 THE REALM OF ORGANISMS CONTRASTED

Albe they endlesse seem in estimation,

Than to recount the seas posterity;

So fertile be the floods in generation,

So huge their numbers, and so numberlesse the.r nation.

We shall come later on to the difficult problem of in-
dividuality or species; but our view of Nature as a whole
nut take account of the fact that species are multitudinous
; t a Ty represent discontinuous individualities, with
much more constancy than the earlier Darwinians supposed
5nn*us said : " There are as many species as there were
fdeasTn th Divine Mind , and there is no doubt that a good
species is like a clear-cut idea. At the other extreme of
ompari on, it is like a chemical element, but on a higher
lie. As Goethe said, The one thing Nature seems to
an at is Individuality; yet she cares nothing for indmd-
uals " If we personify < Animate Nature ', it must at least
be as an artist with inexhaustible imaginative resources,
with extraordinary mastery of materials.

But in the prodigal wealth of individually, it u iota
demonic confusion, but a rational order that we see The
species are remarkably unique and discontinuous, each with
a' Lacter of its own, yet they are often like stages in ^in-
dividual development, and they can o ten be classing n a
logical series. Linna3us established his Systema Nature
q ut apart from any evolutionist conception, and though the
Lt of genetic relationship lies behind every so-called nat-
nral LScation, our present point is simply that Each o
her works has an essence of its own; each of her phenomena
a special characterisation; and yet their diversity is

unity ".

WITH THE DOMAIN OF THE INORGANIC 53

4. Abundance and Insurgence of Life.

A second impression is that of wealth of numbers and of
indomitable will to live. There are, indeed, organisms which
multiply slowly, such as elephants, golden eagles, and cen-
tury plants, but this is not the way with the majority. Most
of the streams of life are ever tending to overflow their
banks. Even the rarities may do so in appropriate condi-
tions; thus a rather rare wingless Glacier-Insect was recently

C_3 i/

found on one stretch of the mer-de-glace at Chamonix in
numbers almost equal to the population of Great Britain and
Ireland. In the case of organisms of low individuation,
which hold their own rather because they are many than be-
cause they are strong or wise, the productivity is beyond aU
our powers of conception. From one Infusorian there may be
a million by the end of a week, and in some of the floating
meadows of the sea there may be a quarter of a million units
in a gallon of water.

There is a well-known British starfish, Luidia ciliaris,
which produces at least two hundred millions of eggs, and yet
it is not what one would call a common animal.

We are familiar with calculations of what would occur
if there were no thinning of the crops how soon the earth
would be covered with a weed, or the sea filled solid with a
fish, or the sky darkened with an insect, and recurrent
plagues of locusts, sparrows, rabbits, and moles remind IH
that a possibility may easily become an actuality. After
allowing a prodigious mortality of 95 per cent., it is com-
puted that the 10,000,000 pairs of breeding rats in Britain
on New Year's Day, 1918, were represented by 40,000,000
pairs at the end of the year, and by 12,000,000 more pairs
the following month ! There is a grimness in the well-known

54 THE REALM OF ORGANISMS CONTRASTED

remarks of Linnaeus that three flies will consume the car-
case of a horse as quickly as a lion can. Professor Woodruff
observed the successive asexual generations of the common
slipper-animalcule (Paramecium) for five years between 1907
and 1912 and found that there were 3,029 of them over
three every forty-eight hours. Careful calculation showed
that they had given evidence of the capacity of producing in
the five years a volume of protoplasm approximately equal
to 10,000 times the volume of the earth. This power of
self-increase must be taken account of in our conception of
living organisms, and the resulting abundance of life must
form part of our impressionist picture of Animal Mature.
At the autumnal climax of productivity in lakes, there may
be to the square yard 7,000 millions of a well-known Dia-
tom, Melosira varians, so that the water is like a living
soup.

We have to remember, moreover, the obvious but notable
fact that we are dealing not with items like grains of sand,
but with individuals, each itself and no other. Mendel put
an end to the phrase " as like as two peas ".

Individual organisms differ greatly in degree of complex-
ity and of integration. Many an Infusorian has an intri-
cate organisation and lives a by no means monotonous life,
though it is only what we somewhat fallaciously call " a single
cell ". Hardly any larger than some Infusorians are some of
the Rotifers, sometimes with about 1,000 cells; a minnow
has its millions, and a bird its millions of millions. What
a contrast between the very incipient integration of a
sponge, the intricate division of labour in a ' Portuguese Man
of War ' hesitating between colony and individual, and the
compact co-ordination of the circumspect wren. As a recent
student of the subject, Mr. Julian S. Huxley (1912), puts

WITH THE DOMAIN OF THE INORGANIC 55

it, we are confronted in Nature with closed independent sv
terns with harmonious parts and with capacity for continu-
ance. Such are individuals. " Though the closure is never
complete, the independence never absolute, the harmony
never perfect, yet systems and tendency alike have real exist-
ence." The individual is Unity in Diversity in what it is
and in what it does, a whole whose diverse parts all work
together, ensuring continuance. When it transcends the
limits of its substance, Mr. Huxley says, that is personality.
But in addition to the abundance of life alike of individ-
ualities and of individuals there is the quality of insur-
gence. Living creatures press up against all barriers; they
fill every possible niche all the world over; they show that
Nature abhors a vacuum. We find animals among the snow
on Monte Rosa at a height of over 10,000 feet; we dredge
them from the floor of the sea, from those great ' deeps ' of
over six miles where Mount Everest would be much more
than engulfed. It is hard to say what difficulties living
creatures may not conquer or circumvent. You may find
insects in hot springs in which you cannot keep your hand im-
mersed, or Rotifers and other small fry under fifteen feet
of ice in the little lakes of Antarctica ; you find a Brine-

* t/

Shrimp and two or three other animals in the Great Salt
Lake; you find a fish climbing a tree, and thoroughly ter-
restrial types like spiders with species living under water;
there is, as Dr. Shipley has shown, a bustle of life on the dry
twigs of the heather. When we consider the filling of every
niche, the finding of homes in extraordinary places, the mas-
tery of difficult conditions, the plasticity that adjusts to out-
of-the-way exigencies, the circumvention of space (as in
migration) and the conquest of time (as in hibernation),
we begin to get an impression of the insurgence of life.

56 THE REALM OF ORGANISMS CONTRASTED

We see life persistent and intrusive spreading everywhere,
insinuating itself, adapting itself, resisting everything,
defying everything, surviving everything !

The great Sequoia trees may be taken as emblems of life's
tenacity. For they have been known to flourish over two
thousand years. One of the oldest had 2,425 annual rings
when it was killed, and must have begun to live 525 years
before the Christian era. " We have," wrote Prof. W. R.
Dudley, i deep in their annual rings, records which extend
far beyond the beginnings of Anglo-Saxon peoples, beyond
even the earliest struggles for liberty and democracy among
the Greeks records of forest conflagrations, of the vicis-
situdes of the seasons, of periods of drought and periods of
abundant and favouring rains." In our conception of life
we must not forget these sublime instances of its power
to endure.

5. Struggle and Sifting.

By the insurgence of life we mean a certain quality of
i push ? or aggressiveness often observable both in plants and
animals. It is an outcome of a native self-assertiveness, and
it is a factor in the struggle for existence as much as a con-
sequence of it. More metaphorically, it is an expression of
the i will to live ', or of the spirit of adventure. To the
conception of the struggle for existence we shall have to
give careful consideration at a later stage ; meanwhile we
must notice that the phrase leads us astray if it is taken
literally or woodenly. It includes every form of the clash
between individuals and their environing difficulties, all the
novel responses that individual living creatures are always
making to the pressure of limiting conditions. These re-
sponses may take the form of intensified competition, even of

WITH THE DOMAIN OF THE INORGANIC 57

intensified cannibalism ; but they have often taken the form,
as Darwin emphasised, of some experiment in co-operation
and socialisation, of some new departure which gives the next
generation a better start in life. All theory apart, our
picture of animate nature is fundamentally out of perspec-
tive unless we recognise that a large proportion of the time
and energy of living creatures, whether in the fighting line
or safe for the time being in organised entrenchments, is
devoted to securing not self-preservation, but the welfare
of the race. Nature, as Goethe said, is continually taking-
advantage of her children's " capacity for self -forget ful-

ness '

Whenever the circumstances are critical, and there is in-
equality or diversity in the response that living creatures
make to their environing difficulties and limitations, a proc-
ess of sifting begins to work, the process of discriminate
elimination familiarly known as Natural Selection. This
also will engage our attention later, but in the meantime
let us not assume that the conventional statement of the
process tells us the whole truth. Just as the struggle for
existence is often more accurately described as an endeavour
after well-being, so, in thinking of Nature's sifting, we go
astray if we think of it as at all haphazard (that is a con-
tradiction in terms), or as directed only to self-preservation,
or as being necessarily sanguinary, or as a process in which
organisms simply remain like passive branches for the prun-
ing-shears. As a sagacious naturalist has well observed,
though somewhat too paradoxically, it is not so much that
Nature selects the organisms fittest to her; it is rather that
each organism selects the natural conditions fittest to itself.

58 THE REALM OF ORGANISMS CONTRASTED

6. A System of Inter-related Lives.

The hosts of living organisms are not random creatures,
they can be classified in battalions and regiments. Xeither
are they isolated creatures, for every thread of life is inter-
twined with others in a complex web. This is one of the
fundamental biological concepts the correlation of organ-
isms in the web of life and it is as characteristically Dar-
winian as the struggle for existence. ]STo creature lives or
dies to itself; there is no insulation. Long nutritive chains
often bind a series of organisms together in the very funda-
mental relation that one kind eats the other. All things are
in flux, there is a ceaseless circulation of matter ; all flesh
is grass and all fish is diatom; and so the stuff of the world
goes round from one incarnation to another. One organism
gets linked on to others, and becomes dependent on them
for the continuance of its race. Flowers and insects are fit-
ted to one another as hand to glove. Cats have to do with
the plague in India as well as with the clover crop at home.
The young of the fresh-water mussels are carried about for
a time by minnows, and the young of the fish called
the bitterling are harboured within the fresh-water mussel.
Squirrels affect the cornfields and water wagtails the sheep-
folds. In short, we get a glimpse of Nature as a vast sys-
tem of inter-linked lives a Systema Nature in a new sense
a web with a pattern (see Thomson, 1914, 1916). With-
out entering upon any discussion of the weaving or evolu-
tion of the web through untold ages, let us take the realm
of organisms as it is, and emphasise the fact that just as
there is a correlation of organs in the body, so there is a
correlation of organisms in the world of life. When we
learn something of the intricate give and take, supply and

WITH THE DOMAIN OF THE INORGANIC 59

demand, action and reaction between plants and animals,
between flowers and insects, between herbivores and carni-
vores, and between other conflicting yet correlated interests,
we begin to get a glimpse of a vast self-regulating organisa-
tion. There may be local and temporary friction and dis-
order; there is the clash of fierce competition in some forms
of the struggle for existence; but the larger fact is the
smooth working of a balanced correlated system.

In philosophical reconstruction we must surely take ac-
count of this inter-relatedness of organisms. Is it not of
interest to find in Animate Nature, as in mankind, advance
from comparatively isolated units towards systematisation
and solidarity? The multitudinous unique threads of life
become more and more interwoven; the warp and the woof
of the web are hunger and love; we get glimpses of a chang-
ing pattern becoming ever finer. The web seems to become
increasingly coherent, though man often rends the fabric
ruthlessly.

Another point of importance, demanding subsequent
study, is that the intricacy of the web of life becomes in it-
self of great significance in evolution. It is its subtlety that
gives point and possibility of survival to minute variations.
The very fact of complex interaction and systematisation
tends to diminish fortuity and to make towards definite
progression. The correlation of organisms which is a prod-
uct of evolution becomes in turn a directive factor.

7. The Prevalence of Adaptations.

The balance demonstrable on a large scale holds through-
out; every higher organism is a complex bundle of adap-
tations. It is suited to its surroundings, to its food, to it-
own weight, to its way of moving, to the regularly recurrent

60 THE REALM OF ORGANISMS CONTRASTED

exigencies of the seasons, and to recurrent risks of injury.
It may be subtly adapted to its mate, in exquisite symbiosis
to its offspring, to its ante-natal life, and to dying at the
proper time ! Wherever you tap organic Nature, Romanes
said, it seems to flow with purpose. The theory of this will
be discussed later on, but in the meantime without pressing
the word purpose let us emphasise the fact that almost all
living creatures are definitely and detailedly fit for the
particular conditions of their life. There can be no doubt
that we live in a world of fitnesses, that we need to search
to find misfits. When we think we have found them, we
have generally made a mistake. This adaptiveness is an-
other large fact of life, which, whatever be the scientific
theory of it, must be incorporated in a concrete Philosophy
of Nature. Let us take a few illustrations.

The structure of a long bone in a mammal is architectur-
ally adapted to give the utmost firmness with the minimum
expenditure of material; the pollen-basket on the hind-legs
of worker-bees is adapted in detail to carrying the nutritive
pollen, the golden, or otherwise coloured, germinal dust; the
leaf of the Venus fly-trap or of the sundew is adapted with
no little subtlety to catching insects ; the parts of flowers
are often adapted to attract insect-visitors and to make the
most of them when they come ; the colours and patterns
of leaf-insects are adapted to harmonise with the foliage
on which they settle; the heart of the ptarmigan is adapted
to the strain of high altitudes, and the shoes which the
ruffed grouse puts on in winter are adapted for treading
on the lightly compacted snow; the mongoose is chemically
adapted to resist snake poison; the tendrils of the mer-
maid's purse are non-living products of the living skate
physically adapted to fasten the egg to seaweed ; the flatfish

WITH THE DOMAIN OF THE INORGANIC 61

is adapted to put on a garment of invisibility again.-t cer-
tain backgrounds; the hedgehog is adapted to meet the win-
ter by hibernation; the peacock is adapted to captivate tlm
peahen; the mother mammal is delicately adapted for the
prolonged ante-natal life of the offspring; and the so-called
'egg-tooth' at the end of a young bird's bill is adapt- <! to
the single operation of breaking the egg-shell and so mi
throughout the whole animal kingdom, for the point of thi-
random list is but to remind us that (with a few very inter-
esting exceptions) every detail of structure and function
may be regarded as adaptive. As the late Professor Weis-
mann used to say, " When you take away all the adapta-
tions from a whale, there is not much left." To illustrate
subtlety, however, let us pause for a moment over a partic-
ular case.

The illustration we select concerns the parental care in
a remarkable New Guinea fish called Kurtus. Each egg
has an envelope of over a hundred twisted threads, coiled
like the rubber filaments in a cored golf-ball. When the
eggs are laid the filaments unwind automatically and unite
in strings, which combine into a cylindrical cord. Thus the
eggs are bound together, forming a twin cluster like a
double bunch of onions such as we see the Breton boys carry-
ing in the streets. But what is the bunch to be fastened to ?
The answer is almost incredible. At the breeding season,
Prof. Max Weber tells us, a bony process on the top of the
skull of the male fish grows forwards and downwards like
a bent little finger, and forms eventually a ring or 'eye 7 .
But before the hook becomes an eye the cord of the donbl.-
bunch of eggs is somehow passed into the loop and attach* d,
and the male fish goes about with his prospective family
fastened to the top of his head. The female shows no trace

62 THE REALM OF ORGANISMS CONTRASTED

of the hooked process of bone, so that we have an interest-
ing, almost startling coincidence, of an adaptation which
makes the eggs into a double bunch and an adaptation which
fixes them to the male's head.

This is but a striking instance of what obtains through-
out Animate Nature Adaptation upon Adaptation. And,
as we shall afterwards see, the working out of a more or
less adequate Natural Selection account of how these adap-
tations have come to be does not lessen the wonder of
the variability that supplies the raw material, or the he-
reditary relation which conserves each gain. The magical-
ness has gone; the rationality shines out more brightly than
ever.

8. The Pervasiveness of Beauty.

Another undeniable impression is that there is beauty
everywhere. Apart from disease, which is almost unknown
in wild Nature, apart from unfinished organisms which
Nature hides away often so carefully, apart from various
domesticated animals and cultivated plants which bear too
flagrantly the marks of man's artistically clumsy, though
scientifically clever, fingers, all organisms are artistic har-
monies, pleasing to the unprejudiced eye, evoking the
aesthetic emotion, especially when seen in their natural set-
ting. And not only the organisms themselves, but the works
of their hands are beautiful- -the nest, and the web, and
the honeycomb, and the coral reef, and the bower-bird's
bower. .Nature has given her verdict in favour of beauty
the reward of survival.

WITH THE DOMAIN OF THE INORGANIC 63

9. The Other Side of the Picture.

It may be said, perhaps, that we have given a one-sided
picture that Animate Nature is a vast gladiatorial show
reeking with blood, that every hedgerow is crowded with
cruelty, that parasitism is rife, that there is much uglim
and devilry, that the exuberant abundance of life is shad-
owed by the obtrusive abundance of death, and that there
are numerous dis-harmonies or imperfect adaptations.
" Throughout the organic world," Professor Hobhouse says,
"harmony is shot through with discord." It would be
utterly unscientific to disregard these shadows, and we shall
consider them at later stages in our argument Anticipat-
ing that discussion, we venture to say that many of the
shadows are of man's making, that many are due to mis-
understanding, and that those that are real do not seriously
affect the general truth of our impressionist picture of Ani-
mate Nature, of which the prominent features are: the
multitude of individualities in an orderly Systema Natura?;
the abundance and insurgence of life; the ceaseless struggle
and endeavour, which makes for self-preservation, self-
assertion, and self-realisation, but also for the welfare of the
race ; the sifting and singling that works towards both these
ends; the extent to which every creature is a bundle of
adaptations; and the beauty that is everywhere.

10. Resemblances between the Realm of Organisms and
the Domain of the Inorganic.

With our impressionist picture of the realm of organism^
clearly in view, let us now briefly compare it with what
is true of the domain of the organic. We must avoid two
extremes. On the one hand, there is the error of exaggerat-

64 THE REALM OF ORGANISMS CONTRASTED

ing the differences so that an impression of utter discontinu-
ity is created. This is undoubtedly false, for organisms
have, as material systems, an inorganic aspect. On the other
hand, there is the error of exaggerating the resemblances,
so that we lose hold of what is distinctive in each. Let us
first notice some of the resemblances.

As among plants and animals, so among lifeless things
there is extraordinary heterogeneity. There are over eighty
different kinds of elements ; the number of different minerals
is legion; the multitude of the stars is untold. But, just
as there is in the realm of organisms the common denom-
inator protoplasm (or shall we say animate protoplasm?),
so there is in the inorganic domain an abstract common
denominator with a few terms, such as matter in motion
and ether under strain, which are not reducible to any-
thing simpler. The living and the not-living worlds agree
in showing diversity in unity, and the big generalisations
of Biology such as omne vivum e vivo, the hereditary rela-
tion, the persistence of the organism in spite of ceaseless
change, and so on, may be compared to the great chemico-
physical generalisations of the persistence of mass, of momen-
tum, of energy.

What the physical irreducibles are is a question beyond
our scope, all that we require for our argument is the agree-
ment among physicists that there are but a few fundamental
concepts. Thus Sir Oliver Lodge declared in 1913: "Mat-
ter in motion, Ether under strain, constitute the fundamental
concrete things we have to do with in physics. The first
pair represent kinetic energy; the second, potential energy;
and all the activities of the material universe are represented
by alternations from one of these forms to the other ' (1913,
p. 35). In terms of a few fundamental concepts, then, it

WITH THE DOMAIN OF THE INORGANIC 65

is possible to formulate a very large part at any rate of
what is observed in the inorganic domain. Whether tin -y
exhaust the re.ality of that domain is quite another ques-
tion.

In both worlds we get the impression of order and uni-
formity. We recognise it, for instance, in the frequent in-
exorableness of the hereditary relation between succe^m-
generations; we are even more familiar with it in the
domain of the inorganic. There do not seem to be many
big collisions in the heavens. Everything works so steadily
that the return of a comet can be predicted to a night, and
the occurrence of an eclipse to an hour. The weather may
be changeable, but no one supposes that it is disorderly. It
is not a multiverse that we live in, but a cosmos. In
his famous Discourse on Molecules (1873), Clerk-Maxwell
spoke of the verification of the postulate of stability in the
properties of things. Unthinkably distant worlds are built
up of molecules of the same kind as those which we find on
the earth. A molecule of hydrogen, for instance, whether
in our laboratories, or in Sirius or in Arcturus, executes
its vibrations in precisely the same time. The furniture
of the earth and of the heavens may be changed, but the
properties of its constituents remain. " Though in the course
of ages catastrophes have occurred and may yet occur
in the heavens, though ancient systems may be dissolved
and new systems evolved out of their ruins, the molecules
out of which these systems are built- -the foundation-stones
of the material universe remain unbroken and unworn.
They continue this day as they were created- -perfect in
number and measure and weight. . . .' For " molecules '
a modern chemist would read ' atoms ', and even then he
would remind us of the apparent disintegration of the atom

66 THE REALM OF ORGANISMS CONTRASTED

in radio-active substances. But in the main what Clerk-
Maxwell said remains true. It is evident that the fulcrum
of the inorganic on which organisms rest their lever is one
of reliable steadiness.

Another point of resemblance or analogy is that the
eighty or so elements may well be compared to species, or
better to types of organisms. We do not know very well
what being an element means, and we do not know very
well what being a species means, but we do know that in
elements and species alike we have to do with uniqueness
or specificity. One is not forgetting, of course, what has
been done in the way of experimental transformism alike
with organic species and chemical elements, but, taking
the world as it is, the characteristic feature, whether of
species or elements, is the persistence of each clear-cut entity
on its own line of being.

As to the inter-relatedness in the realm of organisms, it
has its analogue in any systematisation that there is in the
inorganic domain. The approximation to individuality il-
lustrated in the earth or in the solar system is associated
with a certain amount of correlation between its parts. The
circulation of matter in the organic realm has its counter-
part in the inorganic. The persistence of matter and the
conservation of energy hold true, so far as we know, in both.

As regards beauty, it varies greatly in significance, but
there is no limit to its range. In its way the grain of sand
is as perfect as the egg of the wren. There is often an in-
describably fine finish about the inorganic natural product,
as we see in agates and crystals, and there is a haunting
beauty in things great and small, in the mountain and in
the pebble, that makes us thoughtful as well as joyous. We
venture to say, however, that in the inorganic domain com-

WITH THE DOMAIN OF THE INORGANIC C>7

binations of lines and colours that are imt beautiful are not
uncommon, whereas in the organic realm t.lie non-beautiful
is extremely rare, the reason being that beauty is correlated
with individuality.

If we assume the external independence of what we call
matter and regard it as the building-stone of tin- \v.rld.
those of us who are not chemists and physicists mu-i make
an effort to rid ourselves of any picture of it as gro-- and
inert. How much matter is invisible like tin- air! II..\\
much is transparent like the water! How tenuous is tin-
film of the soap-bubble! How much is ever pas.-ini: I'mm
phase to phase like an elusive genie! Those who are in-
clined to think meanly of matter should look again at it.-
magnificence in the starry heavens and at its exquisiteness
in the miniature architecture of snow-crystals. We must also
bear in mind how finely it lends itself to Life's purposes-
the fashioning of a feather, the sculpturing of a shell, the
casting within the bud of those blue bells which ring every
day by the wayside.

But when we pass from ordinary sight to scientific vision,
how subtle and ethereal matter becomes! What pictures
modern physics gives us of a restless activity suggestive of
life!

Matter is thought of as consisting of unit particles or
molecules, which move freely with great velocity in gases,
and these molecules are thought of as consisting of several
atoms which exist in specific and constant configurations.
Until 1896 atoms were regarded as the ultimate build inir-
stones of the material universe, but it has since been sug-
gested that an integration of hundreds of thousands of elec-
trons might form an atom or form a revolving halo amund
an atom. The study of radium has led to the view that the

68 THE REALM OF ORGANISMS CONTRASTED

atom is not the natural limit of the subdivision of matter,
that the stream of energy poured forth by radium is due to
a transmutation of the position of parts constituting the
atom, the radium slowly changing into something else
helium, and eventually lead.

The individual molecules of matter in a gaseous state
are believed to move with great velocity, incessantly collid-
ing with one another and rebounding, making impacts on
the walls of the vessel that contains them, or spreading
themselves through any space to which there is free access.
. . . We need not try to follow what is beyond our per-
sonal scope, but to illustrate the subtlety of modern con-
ceptions of matter which is all that concerns us at pres-
ent let us take a few sentences from Professor Soddy's
luminous Matter and Energy:

" Every cubic centimetre of any gas, measured under
standard conditions (0 C. and 760 millimetres baromet-
ric pressure), contains twenty-seven million million mil-
lion molecules. The weight of the single molecule of hydro-
gen is about three million-million-million-millionths of a
gram, and its velocity at C. is rather more than a mile
a second. The hydrogen molecule is, it is true, the smallest
and simplest molecule of matter known, but it is a large and
sluggishly moving individual compared with another known
particle, the electron or atom of negative electricity '
(Matter and Energy, p. 82).

When the temperature of a gas is lowered the molecules
come nearer one another, till their mutual tendency to draw
together restricts their wandering movements, and a liquid
is formed. Inside the surface skin of the liquid the molecules
move very rapidly, and collide so frequently that they fol-
low very zigzag paths, being perpetually turned back the

WITH THE DOMAIN OF THE INORGANIC 69

way they came. It is no dance of molecules, but a chaotic
jostling. Every drop of liquid is in a state of commotion
and turmoil indescribable (ibid., p. 89). Of solids relatively
little is known, but in a crystalline solid where we have
to deal with fixed architecture there can be no translatory
motion. " But vibratory motion in constrained paths there
must be among the molecules of a solid, increasing with
the temperature until the molecules drag their anchors, as
it were, and the substance melts ' (ibid., p. 9-i).

Thus the concept of matter leads us to a very ethereal
picture. What is to be said of energy? It is the power of
doing work, and may be actual or potential, in motion or in
position. But except when it changes, its existence can only
be inferred. Professor Soddy writes : " The Apostle Paul
had no thought of physical things in his mind when he used
the words, i The things which are seen are temporal, but the
things which are not seen are eternal.' But the words can
be applied with profit to illustrate, perhaps more forcibly
than any other single sentence, the essential nature of energy.
It is only the temporary changes in the form and relative
amount of energy which are manifest. So long as energy
neither changes in amount nor in position, it belongs to the
unseen and eternal. ISTo direct evidence of its existence can
be obtained." Yet we are never in doubt as to its reality, for
it is always conserved. And besides Matter and Energy
there is the Ether which Sir Oliver Lodge describes as " the
universal connecting medium which binds the universe to-
gether, and makes it a coherent whole instead of a chaotic
collection of independent isolated fragments. It is the ve-
hicle of transmission of all manner of force, from gravita-
tion down to cohesion and chemical affinity; it is therefore
the storehouse of potential energy. ... It does not

70 THE REALM OF ORGANISMS CONTRASTED

move in the sense of locomotion, though it is probably in
a violent state of rotational or turbulent motion in its small-
est parts; and to that motion its exceeding rigidity is
due." Its density must be far greater than that of any form
of matter, " yet matter moves through it with perfect free-
dom, without any friction or viscosity ' (1913, p. 33).

The ether, says Sir J. J. Thomson, " is not a fantastic
creation of the speculative philosopher; it is as essential to
us as the air we breathe. . . . The study of this all-
pervading substance is perhaps the most fascinating and im-
portant duty of the physicist." And Sir Oliver Lodge also
speaks of the fascination of this portentous entity, material
but no matter, " the great engine of continuity " : " Its
curiously elusive and intangible character, combined with
its universal and unifying permeance, its apparently infinite
extent, its definite and perfect properties, make the ether the
most fundamental ingredient in the material cosmos."

We have delayed over these elementary ideas because those
who are convinced of the apartness of living creatures are apt
to fail in appreciation of the inorganic domain. Even the
use of the word l inert ' betrays either prejudice or igno-
rance, both probably unconscious.

Professor Enriques rightly objects to the false antithesis
involved in opposing the spontaneity and change of every-
thing that lives to the inertia and immutability of matter.
He uses " spontaneity ' here to mean " activity ' or " pos-
sibility of changing through internal conditions," and rejects
the idea of " an absolutely passive matter ". " The view
seems far more adequate," he says, " which holds that every-
thing around us is living and active, save for a difference
in degree in the intensity or in the rapidity of the changes,
and in the relative importance of the internal and external

WITH THE DOMAIN OF THE IXOlUiAMC 71

factors for the course of the phenomena ' (Enriques, 1914,
p. 368). It is useful, however, to keep a term like " living '
for organisms only.

11. Contrasts between the Realm of Organisms and the

Domain of the Inorganic.

Let us turn from the resemblances to the contrasts between
the realm of organisms and the domain of the inorganic.

The first great contrast is that there are no true individuals
in the domain of the inorganic, though there is a great di-
versity of quality. A crystal approaches some of the criteria
of being an individual- -it has definiteness of form, coher-
ence, a capacity for a sort of growth and repair ; but a crystal
is homogeneous, not made up of inter-dependent parts work-
ing together to secure continuance either of itself or of its
kind. The crystal's regularity is not functional ; it is per-
haps the visible expression of the molecular structure. Sim-
ilarly, the solar system makes some approach to being an in-
dividual, having independence and unity in diversity, but
it can hardly be said that the solar system is an agent, or
that its working is directed towards its own continuance.

There are few phenomena in the domain of the inorganic
which can be spoken of as propagative, though one may
think of the origin of a double star, or of the earth giving
birth to the moon, or of the multiplication of crystals. This
is in marked contrast with the abundant multiplication
characteristic of organisms.

And while the volcano is insurgent enough in a sense, and
the breakers seem furious in their assaults on the cliffs,
we know that there is no freedom of action, that everything
is without alternative.

There seems no doubt as to the general fact that the solar

72 THE REALM OF ORGANISMS CONTRASTED

system developed from a much less differentiated, much
more diffuse, condition; it is certain that our earth has
passed through various stages of development, and has be-
come increasingly differentiated in its pattern and features;
and many facts point to the occasional origin of new chemical
collocations in Nature; but there is nothing in the domain
of the inorganic which can be compared with any precision
to organic evolution and there is nothing that can be com-
pared to the struggle for existence. We are not justified in
saying that there may not have been elimination of unstable
collocations which could not last and had to be scrapped, but
this bears at most a superficial resemblance to the answering
back to environing limitations and difficulties which is
the essential feature of the organismal struggle for existence.
There is neither endeavour nor selection in the inorganic
domain, and till organisms emerged there was little or no
power of learning in the school of time.

For plain people it was a very useful classification that
Samuel Butler suggested: Living Creatures, Machines, and
Things-in-General. Machines are inorganic material sys-
tems, but they must be kept quite by themselves in any dis-
cussion like this, for they are collocations put together by
man with a definite intention. They are purposive construc-
tions, and they are the only non-living things of which this
can be said. A river often cuts its way very effectively,
but we*are romancing if we speak of its purpose. Its bed
is not adapted to it, as a flower to its insect visitor. The
concepts of adaptation and purposiveness do not apply in
the inorganic world, where there are no alternatives.

It seems that the domain of the inorganic is con-
trasted with the realm of organisms by the absence of in*
dividuaJity, reproductivity, freedom of action, endeavour,

WITH THE DOMAIN OF THE INORGANIC 73

and purposiveness. It is a domain of mechanically neces-
sitated sequences without alternatives and of uniformities
without exceptions. In all probability this quality of uni-
formity has been a quite indispensable basis for the super-
structure of life, affording stability for the experiments and
endeavours that have doubtless been characteristic of organ-
isms from the first.

12. The Suitability of the Inorganic to be the Basis and

Environment of the Organic.

We wish in conclusion to allude to the very interesting
fact which will demand further attention later on that
the not-living earth exhibits many remarkable fitnesses to
be the home of life. Living means trafficking with the en-
vironment ; to do this effectively organisms must be complex
and yet coherent, plastic and yet durable, and they were
able to gain these qualities because of the fundamental prop-
erties of the primary constituents of the inanimate environ-
ment. The properties of Water and Carbon dioxide, the
tendency some forms of matter have to complexify, the prop-
erties of the colloid state, the character of the sea as a
medium, these and other inorganic data are, as Prof. L. J.
Henderson (1913, 1917) has shown in detail, extraordina-
rily well suited to be pre-conditions of organisms. We must,
of course, avoid arguing in a circle, for that the earth should
be ' friendly ' to living creatures is not surprising, since
in their physical nature they are bone of her bone and flesh
of her flesh her very children. Yet when we give full
consideration to the fact that living creatures as material
systems are in no wise foreign to the earth, but are in deep
and subtle ways congruent and solidary with it, perhaps we
shall not be inclined to brush aside hurriedly the suggestion

74 THE REALM OF ORGANISMS CONTRASTED

that the domain of the inorganic is as it is for a purpose. At
present we leave this as a pious anticipation.

SUMMARY.

The world without is conveniently divided into the realm of
organisms and the domain of the inorganic, which stand in close
inter-relation and sharp contrast. In the domain of the inorganic
from solar system to snow crystal, from the hills and the sea to
dust and dew-drops we are impressed by (a) the rich concrete
fulness of different kinds of things and events, which, nevertheless,
can be summed up, for most purposes, in terms of a few funda-
mental concepts, such as matter and motion; (b) the orderly uni-
formity that pervades it; and (c) the restless and subtle activity
that appears to obtain throughout.

A study of the realm of organisms discloses a multitude of in-
dividualities and yet an orderly systema nature. There is an em-
barrassment of different kinds 25,000 named Vertebrates, ten times
as many named backboneless animals, and about as many plants,
yet a rational classification is possible.

A second impression is of the abundance and insurgence of life.
Most of its streams tend to overflow their banks. Many species
are represented by numberless individuals. There is also the quality
of insurgence, for we see life intrusive everywhere, pressing up
against limitations, circumventing or overcoming difficulties like
a strong will.

Another impression is of ceaseless struggle and endeavour on the
one hand, ceaseless selection or sifting on the other. Living crea-
tures react in manifold ways to environing limitations and difficul-
ties, and in the clash that ensues there is often discriminate elimina-
tion.

The inter-relatedness of organisms is another fundamental fact.
Animate nature is a vast system of interlinked lives, a web with
a pattern. As in mankind, there is progress towards systematisa-
tion and solidarity, and the correlation of organisms which is a
product of evolution becomes in turn a directive factor.

Another fundamental impression is that of fitnesses. Every
higher organism is a complex bundle of adaptations. It is suited
to its inanimate surroundings, to its food, it may be to other crea-
tures, to its own weight, to its movements; it may be to a mate

WITH THE DOMAIN OF THE INORGANIC 75

and to offspring; to regularly recurrent times and seasons and risks
of injury; to its ante-natal life and to dying at the proper time!
If we are to consider Animate Nature in its totality we must not

v

overlook the practically universal pervasiveness of beauty of form
and colour.

It may be said that this impressionist picture of Animate Nature
is one-sided, that it ignores the redness of tooth and claw, tho
cruelty, the ugliness, the parasitism, the obtrusively enormous mortal-
ity, and the mis-adaptations. Much of this objection is due to
misunderstanding; the admittedly great difficulties that remain will
be discussed in Lecture XVIII.

Comparing the realm of organisms with the domain of the in-
organic, we must avoid the error of exaggerating the differences
(so that an impression of discontinuity is created) and the error
of merging the two (thus missing what is distinctive in each).
In the domain of the inorganic there is little individuality (though
much difference of quality), no apparent freedom of action, no
endeavour, no purposiveness, no learning in the school of tinu'.
But its uniformity has been a probably indispensable fulcrum for
the lever of will. It should be noted too that the old view of inert
matter has given place to a dynamic conception of extraordinary
subtlety.

LECTURE III.
THE CKITERIA OF LIVINGNESS.

LECTURE III.
THE CRITERIA OF LIVINGNESS.

1. Living and Not-living. 2. The Essential Characteristics of
Living Organisms. 3. Persistence of a Complex Specific
Metabolism and of a Corresponding Specific Organisation. 4.
The Capacity of Growth, Reproduction, and Development.
5. Effective Behaviour, Registration of Experience, and
Variability.

1. Living and Not-living.

IF we are to reach a coherent view of Nature, such as
could be included in a philosophy, we must arrive at some
discernment of the characteristics which mark off living
organisms from their not-living surroundings. In the pres-
ent state of science a definition of the organism cannot be
more than tentative, but it must be continually attempted.

When we pass from watching a flowing stream or the
wind-swept clouds, to look at the bees visiting the flowers,
or the swallows building their nest, we feel that we are
facing something new living. What we see is not, indeed,
in every respect new as compared with the inorganic, for
gravity acts on animals just as on drops of rain, and living
creatures never disobey, so far as we know, the ordinary
laws of physics and chemistry which sum up the routine
of our analytic experience of the not-living. On the whole,
however, especially if we look at animals rather than plants,
the differences impress us more than the resemblances,
we feel rightly that we are in the presence of something
new. Organisms show characteristics which mark them off

80 THE CRITERIA OF LIVINGNESS

from their non-living environment. What are these charac-
teristics ? What are the criteria of living organisms ? What
is essential in the admitted contrast between the living and
the not-living ?

2. The Essential Characteristics of Living Organisms.

In the most general way what we see is plain enough.
We see organisms acting on their environment displacing
it, changing it, eating it, and so on ; and again we see that
the environment acts upon the organism displacing it,
changing it, stimulating it, oxidising part of it, and so on.
So that living is a twofold relation between organisms and
their environment a twofold relation of action and reaction,
of thrust and parry, of doing and suffering. At one moment
the organism is relatively the more active, at another the
environment. Living is a continual adjustment between
these two relations.

When we look at the facts a little more closely we see
that all living creatures plants as well as animals are
active towards two main results, their own self-maintenance
and the continuance of their race. Organisms have in their
living just two main businesses caring for themselves and
caring for their offspring. But all this is living rather than
life ; we are only hiding the problem behind the word organ-
ism. What are the marks of a living creature ? that is the
question. What is the best answer we can give for the time
being ? Many answers have been given, but none has found
wide acceptance, which doubtless means that biologists have
not yet seen the insignia of organisms in their entirety, or
in proper perspective.

One of the best statements is that of Roux, who recognises
five " elementary functions " :

THE CRITERIA OF LIVINGNESS 81

I. Self-disassimilation.

II. Self-preservation, including assimilation, growth, movement,
feeding, etc.

III. Self-multiplication.

IV. Self-development.

V. Self-regulation in the exercise of all functions, including
self-differentiation, self-adjustment, self-adapt at i-.n, and
in many organisms distinctly recognisable psychical func-
tions.

It is very interesting to notice bow this bard-headed found. T
of what be calls " developmental mechanics " speaks deliber-
ately of self-preservation, self-increase, self-differentiation,
self-regulation, and so on.

The statement we propose differs a little from this and
from others, being an attempt at a logical grouping of the
fundamental characteristics.

3. Persistence of a Complex Specific Metabolism and of
a Corresponding Specific Organisation.

The image of the organism is the burning bush of old ;
it is all afire, yet it is not consumed. Nee tamen consumeba-
tur. Or it is like the sunlit top of a fountain rising in
the air; its component elements are restlessly changing on
their way up or on their way down, yet the form remains
approximately the same. The peculiarity is not that the or-
ganism is in continual flux, for chemical change is the
rule of the world ; the characteristic feature is, that the
changes in the organism are so regulated and balanced that
the integrity of the creature is retained. The great English
physiologist, Sir Michael Foster, used to say that " A living
body is a vortex of chemical and molecular change " ; and
the image of a vortex expresses the fundamental fact of
persistence in spite of ceaseless change.

82 THE CRITERIA OF LIVINGNESS

A vivid statement of this characteristic feature of life
was given by Huxley in his Crayfish (1880, p. 84) : " The
parallel between a whirlpool in a stream and a living being,
which has often been drawn, is as just as it is striking. The
whirlpool is permanent, but the particles of water which
constitute it are incessantly changing. Those which enter
it, on the one side, are whirled around and temporarily con-
stitute a part of its individuality ; and as they leave it on
the other side, their places are made good by new comers.

" Those who have seen the wonderful whirlpool, three
miles below the Falls of Niagara, will not have forgotten
the heaped-up wave which tumbles and tosses, a very em-
bodiment of restless energy, where the swift stream hurrying
from the Falls is compelled to make a sudden turn towards
Lake Ontario. However changeful in the contour of its
crest, this wave has been visible, approximately in the same
place, and with the same general form, for centuries past.
Seen from a mile off, it would appear to be a stationary
hillock of water. Viewed closely, it is a typical expression
of the conflicting impulses generated by a swift rush of
material particles.

" Now, with all our appliances, we cannot get within a
good many miles, so to speak, of the crayfish. If we could,
we should see that it was nothing but the constant form
of a similar turmoil of material molecules which are con-
stantly flowing into the animal on the one side, and stream-
ing out on the other."

Without accepting the view that the organism is exhaust-
ively described by calling it " nothing but the constant form
of a turmoil of material molecules ", without forgetting that
the organism- whirlpool acts on the stream, and gives rise
to other whirlpools, we welcome the metaphor as vividly true

THE CRITERIA Ol I.I VI \Ci.\KSS

within its limits. But the ima^e is too ii> n. ral ! 1>.- ade-
quate; we must inquire int> tin- eliaiiiiet'iil integrity "f ili<-
organism more carefully. Three points are of out.-tandini:
importance: (a) that the changes in the organism arc very
complex, having essentially to do with protein substanci -
in a colloid state; (b) that they are specific for each kind
of creature, and (c) that they are correlated in such a way
that they go on, and ttie specific structure likewise persists.
Let us take each of these points in turn.

(a) Metabolism of Proteins.

According to some physiologists the only absolute differ-
ence between living organisms and inorganic bodies is, that
proteins are universally present in the former and absent
in the latter. \ 7 erworn writes: " Since it is known that
the nitrogenous proteids, with their allies, which in part
are derived from the proteids and in part are necessary to
their formation, are the sole organic compounds that an
never wanting in living substance, that everywhere they
constitute its chief mass and alone are sufficient for its for-
mation, it can be said that all living organisms are charac-
terised by the metabolism of proteids' (1899, p. 13G).
These protein compounds, such as white of egg or tin- dut. n
of bread, are peculiarly intricate, with a large number <>1
atoms or atom-groups in their molecules; they diffuse very
slowly and do not readily pass through membranes; th.
occur in a colloid state, and although some, e.g., haeinoirlnbin.
are crystallisable, they are not known in a crystalloid state
in the living organism; they are relatively stable bodi. -.
yet they are continually breaking down and bein<j built
up again within the body, partly under the direct influence
of ferments or enzymes. The constructive, synthetic, up-

84 THE CRITERIA OF LIVINGNESS

building, winding-up processes are summed up in the term
anabolism ; the disruptive, analytic, down-breaking, running-
down processes are summed up in the term katabolism, botJa
sets of processes being included in the term metabolism, for
which we have, unfortunately, no English equivalent like
the German word t Stoffwechsel ', change of stuff. But when
Verworn says " The life-process consists in the metabolism
of proteids ", he, like Huxley, is summing up too simply ;
it would be more correct to say that living always involves
the metabolism of proteids or proteins.

(b) Specificity or Individuality of Metabolism.

A second feature is that each organism has its chemical
individuality, and associated with this a specific structural
collocation. There is a chemical specificity in the milk of
nearly related mammals, and in the grape-juice of nearly
related vines. A stain due to the blood of a rabbit can
be readily distinguished from a stain due to the blood of
a man a fact that has been used with effect in some modern
murder trials. ISTay more, the blood of a horse can be
distinguished from that of an ass. The crystals of the red
blood pigment of a dog differ from those of a wolf; indeed,
those of a domestic dog differ from those of the wild or
feral Australian dingo. The familiar fact that there are
individuals who cannot eat particular kinds of food, such
as eggs, or oysters, without more or less serious symptoms
is another illustration of specificity which is actually indi-
vidual. It looks as if a man were individual not merely
as to his finger-prints, but as to his chemical molecules. Even
the sexes differ in their metabolism, as is diagrammatically
shown in one or two cases where the colour of the blood
is actually different. We are here in contact again with

THE CRITERIA OF LIVINGNESS 85

what we have already alluded to as one of the remarkable
differences between the organic and the inorganic Individ-
uality. We come back to what was said of old : " All flesh
is not the same flesh : but there is one kind of flesh of men,
another flesh of beasts, another of fishes, and another of
birds."

Prof. Charles Richet and other physiologists have of
recent years devoted much attention to the phenomenon that
dosing an animal with certain poisons may bring about,
if the animal survives, a peculiar physiological condition,
called anaphylactic, which make the creature hyper-sensitive
to subsequent doses. An extract of sea-anemone's tentacles
is very poisonous to dogs, but, when the dog recovers, a very
minute second dose a month afterwards may be rapidly fatal.
The phenomenon of anaphylaxis is extraordinarily subtle;
thus a man to whom shrimp flesh is poisonous may be un-
affected by lobster. He is violently poisoned if he eats a
single shrimp, and yet he is able to enjoy a whole lobster;
straining at a gnat, he swallows a camel with ease. The
importance of this is that it points towards the conception
of the chemical individuality of the living creature. There
is a specific chemical constitution which is on the whole
best for the species in question, which makes for stability.
Those that survive the introduction of a poison, it may be
the result of digesting a particular kind of food, do not
necessarily mark the surviving type, for they may be killed
by the anaphylactic violence following a second dose. So
much the worse for the individual, but so much the better,
possibly, for the species, which cannot safely admit of any
compromise with poison. Thus, speaking of man, Richet
says: " Anaphylaxis appears to be an efficacious and ener-
getic method of maintaining the chemical stability of our

86 THE CRITERIA OF LIVINGNESS

bodies by provoking an immediate and violent reactional
response to the introduction of any substance which might
change it."

(c) Persistence in Spite of Change.

In the ordinary chemical changes in the inorganic domain,
as in the weathering of rocks, one substance changes into
another. Iron becomes rust. So is it also in the living
body, but there we encounter a new and characteristic fea-
ture continual restitution or recuperation. The reactions
are not self-destructive. Repair counteracts waste ceaselessly.
There is a continual balancing of accounts so that debts are
more or less effectively avoided. Without metaphor, the
specific organisation is continuously repaired so that the
specific activity continues, and if organisms after they
once got grip had been content to remain relatively simple
they need never have died a natural death.

We regard this characteristic as fundamental, the capac-
ity of retaining integrity in spite of ceaseless specific change,
one may almost say through change. For the energy lib-
erated in katabolism is used to promote compensating anabo-
lism. The more it changes, the more it remains the same
thing; the most intensely living animals have the most per-
sistent integrity of form. In any case, an organism was
not worthy of the name until it showed, for a time at least,
not merely activity, but persistent activity a power of bal-
ancing accounts. Like a clock the organism is always run-
ning down and always needing to be wound up ; but unlike
a clock it can wind itself up, if it gets food and rest. In
green plants, as every one knows, there is usually a quite
unnecessary amount of winding up with the interesting
far-off result that animals, utilising already manufactured

THE CRITERIA OF LIVINGNESS 87

food, have time for agency, and that we have time for
thinking about it all.

We are familiar with the self-preservative devices and
reactions of higher animals and with the self-preservative
way in which the various organs of the body work into each
other's hands ; and it is a remarkable fact that a specific
activity in a nervous system may be restored after the de-
struction of the particular nerve-elements on which the activ-
ity previously depended. This vicarious functioning is all
the more remarkable inasmuch as there is not in higher
animals any regeneration or replacement of nerve-cells after
birth. But deeper than all this is the correlation of chemical
processes in the individual units, so that down-breaking leads
to up-building, so that up-building makes further down-break-
ing possible, the pluses balance the minuses, and the creature
goes on. The unicellular organism spends its substance and
yet has it, through its fundamental capacity for self-renewal.
If the living creature is a machine, it is a self-stoking, self-
repairing machine, and it can take a rest betimes.

Several saving-clauses must be appended :--(!) The or-
ganism shows persistent functionality, but it is not known
to offer any exception to the law of the conservation of
energy. In living it expends energy, and suffers wear and
tear; it cannot continue unless it captures more energy and
is able to repair its structure. Fatigue and the dying of
parts, such as leaves, not to speak of senescence and death
itself, show that the fundamental capacity for self-main-
tenance is not perfect. But the broad fact is that the capacity
has for a variable time a very considerable degree of per-
fection. The organism's chemical activities (and repair-
processes) are so correlated that it remains for a considerable
time a going .concern. As we shall afterwards see, some

88 THE CRITERIA OF LIVINGNESS

investigators claim for the organism a unique power of re-
tarding the universal tendency of energy to sink into unavail-
able form, in other words, of evading, in some measure, the
second law of thermodynamics.

(2) If a piece of organism be ground up in a mortar and
the expressed juice poured into a vessel, a process of metab-
olism is sometimes observable similar to that which occurs
in the living body. Every one knows that pepsin may be
bought at the chemist's, and used to digest a shred of beef
in a test-tube. It is true that neither the ferment nor the
proteid can as yet be synthesised artificially, but this may
be only a question of time and ingenuity. We cannot dog-
matise as to the limits of mimicking in a test-tube what
occurs normally in an organism, and if the reaction be
mimicked, then there is nothing characteristically vital about
it, any more than there is about organic substances like
sugar and indigo which used to be regarded as producible
in organisms only. But the point is that in the living
organism the process in question is a link in a concatenated
series which makes for self-repair and continuance. The
essential secret of living is in the correlation which secures
persistence amid change.

(3) If the whole of a living organism, say a spinach
plant, were to be minced up quickly, no change of chemical
composition would necessarily occur for some little time,
but what exhibition would there be of the alleged funda-
mental characteristic of self-repair ? It may be answered
that the mincing has destroyed the make-up of the organism,
that the living units of the body arc in most cases adapted
for self-repair only in particular conditions, such as an
environment of other cells, in the collocation which has been
abolished by the mincing. But while the power of self-repair

THE CRITERIA OF LIVINGNESS 89

cannot operate except under certain conditions, it is an ex-
traordinary fact that some creatures can be re-made even
after mincing. If a sponge be minced up and forced through
a cloth filter, little drops of the debris, placed in appropriate
environment, will at once proceed to build themselves up
into new sponges. The characteristic metabolism is retained,
re-differentiation sets in, the tiny mass begins to feed and
grow, the normal organisation is restored, the sponge is once
more a going concern. The restoration of the sponge from
a drop of debris is as different from the re-building of a
crystal from a fragment, as the highly differentiated sponge
from the very homogeneous crystal, or as the intensely meta-
bolic living sponge from the self-contained, though certainly
not inert, crystal.

(4) If living implies persistent metabolism, we must
admit a saving-clause to the effect that the metabolism may
sink at times to a minimum. Further investigation will
make things clearer, but there is difficulty at present in
regard to the familiar facts that dried seeds may retain their
power of germinating for as long as a man lives, or that
desiccated animals and germs of animals (as in the case
of some thread-worms, rotifers, bear-animalcules, and small
crustaceans) may remain in a state of so-called suspended
animation for, it may be, a dozen years. Small Nematode
worms have been known to revive after being fourteen years
dry alive rather than living. It has not been satisfactorily
proved that mummy wheat germinates, but Becquerel got
seedlings from seeds which had lain for eighty-seven years
in a herbarium a Jiortus siccus indeed.

Becquerel took seeds of wheat, mustard, and lucerne, and
perforated their air-tight seed coats ; dried them in a vacuum
at 40 C. for six months; sealed them up in an almost ex-

90 THE CRITERIA OF LIVINGNESS

hausted tube for a year ; submitted tbem to the temperature
of liquid air (- -190) for three weeks, and of liquid hydro-
gen (- -250) for three days; and then put them on moist
cotton wool, where they germinated. We are forced by such
experiments to realise that life is not an entity but a relation
between organism and environment, but we must have more
facts before we deal effectively with the difficulties which
the facts raise. Does the process of living suffer complete
interruption, and recommence when water soaks in, and
oxygen after it, as Becquerel seems to think ; or does the
metabolism sink to a minimum, like the combustion of a
sleeping fire ? Very interesting, in this connection, is Pro-
fessor Waller's observation that as long as a tissue is living,
or an egg capable of development, or a seed able to germinate,
there is a particular electrical reaction the l blaze ' reaction
which disappears when living has irrecoverably ceased.

(5) The criterion of an organism to which we have given
prominence is that of persistence, which is obviously relative.
Some organisms can keep agoing for a hundred years, some
for only a hundred days, and some for only a hundred hours.
The question arises as to the limit. Is it possible that there
were primeval organisms which lived for only a hundred
seconds ? If so, how would these hypothetical creatures
differ from the pill of potassium which flares itself out,
rushing about on the surface of the basin of water on which
it has been thrown? The answer must be, that it is not
the length of life that counts ; the criterion is whether,
alongside of disruptive processes associated with protein sub-
stances, there were also correlated constructive processes,
making for repair and self-maintenance. Some Infusorians
divide more than once every day, some Bacteria divide more
than once every hour, and these may be near the limit of

THE CRITERIA OF LIVINGNESS 91

the duration of individual life at the one extreme. The
Big Trees living for two thousand years may be near the
limit in the other direction.

4. The Capacity of Growth, Reproduction, and

Development.

One can readily conceive of an organism which balanced
its accounts from hour to hour, but never had much margin.
There are such delicately-poised ephemeral organisms, which
live, to use a homely expression, from hand to mouth. They
are going concerns, but they are trading on a very restricted
capital, and cannot survive a crisis. So we see at once that
there is a commanding advantage in being able to store energy
in potential form, and this is fundamentally characteristic
of organisms especially of plants. As regards the ratio
between the income of energy and the work done, living
organisms are far ahead of any engine, but there is also
the power of accumulating energy which can be used later.
Thus we are led to recognise the po~wer of growth as one
of the characteristics of organisms. A surplus of income
over expenditure is the primal, condition of organic growth.
It has further to be noted that the growth of living creatures,
as contrasted with that of crystals, is at the expense of
materials different from those which compose the organism;
it implies active assimilation, not passive accretion; and it
is very definitely a regulated process. An organism does not
grow like a snowball.

But growth leads on to multiplication. As Haeckel clearly
indicated in his Generelle Morphologie (1866), repro-
duction is discontinuous growth. How impossible it is to
draw any hard and fast line between a fragmentation which
separates off overgrowths, and the more specialised modes

92 THE CRITERIA OF LIVINGNESS

of reproduction ! Perhaps we are looking back to near the
beginning of organic life when we see the fragmentation
of a protoplasmic corpuscle which has grown too large to
be a successful unity. It cannot be gainsaid that the division
of a cell remains one of the mysteries of the world. Professor
Bateson writes (1913, p. 39): "I know nothing which to
a man well trained in scientific knowledge and method brings
so vivid a realisation of our ignorance of the nature of
life as the mystery of cell-division. . . . It is this power
of spontaneous division which most sharply distinguishes
the living from the non-living. . . . The greatest advance
I can conceive in biology would be the discovery of the
instability which leads to the continual division of the cell.
When I look at a dividing cell I feel as an astronomer might
do if he beheld the formation of a double star: that an
original act of creation is taking place before me."

In most cases the cell divides into two precisely similar
daughter-cells, this being associated with an exceedingly
complicated division of the nucleus, which secures that each
of the two daughter-cells gets a meticulously precise half
of the chromatin material of the original nucleus. But
the difficulty of the problem is increased by the fact that
a cell may also divide into two dissimilar halves, as appears
to happen in certain modes of inheritance. In exceptional
cases among multicellular organisms the process of cell-
division is simpler and more direct, and in some unicellular
organisms it is very simple. It is probable that the com-
plicated methods of cell-division which are now the rule
are the results of a long process of evolution, and that the
fundamental characteristic is simply division. But why
should the protoplasmic unit divide ? Spencer, Leuckart,
and James pointed out independently that, as a cell of

THE CRITERIA OF LIVINGNESS 93

regular shape increases in volume, it does not proportionately
increase in surface. If it be a sphere, the volume of material
to be kept alive increases as the cube of the radius, while
the surface, through which the keeping alive is effected, in-
creases only as the square. Thus there tends to be a hazard-
ous disproportion between volume and surface, which may
set up instability. The disturbed balance may be restored
by the emission of processes from the surface of the cell,
making it like a country with a big coast-line, as in Rhizopod
Protozoa or in the amoeboid cells found in most multicellular
animals. But the disturbed balance is normally restored
by the cell dividing into two cells. This view indicates the
advantage of cell-division, but beyond the hint that a dis-
proportion between volume and surface may induce physio-
logical instability, perhaps a cell-solution or cytolysis, it
does not tell us what brings the process about.

It is an interesting fact that if a non-nucleated fragment
of cell-substance be cut off from a large Protozoon, it can
move about for a time, but it cannot feed or grow, and
sooner or later it dies. But a nucleated fragment does not
'die. There are other facts which point to the same conclu-
sion that the nucleus is a sort of dynamic centre to the cell
(especially a trophic centre), and that stability depends on
keeping up a certain proportion or relation between the
nucleoplasm and the cytoplasm. It follows, therefore, that
if growth imply an increase of cell-substance out of pro-
portion to nuclear substance, a state of physiological in-
stability may set in, which cell-division may counteract.
In many large Protozoa there are numerous nuclei.

It has also been suggested that a period of growth is auto-
matically followed by a process of " autokatalysis ", or self-
fermentation, but precise data are awanting. What we wish

94 THE CRITERIA OF LIVINGNESS

to indicate, however, is that the correlation of chemical
processes which makes continued self-maintenance possible,
naturally leads on to growth, and that growth naturally leads
on to division or reproduction. This remains true though
our ignorance of the physiology of cell-division is confessed.

It is possible, however, to take another step. It is char-
acteristic of organisms to multiply, and they multiply by
division, separating off a fragment, a group of cells, or a
single cell. This brings us face to face with development
the power that a part has of growing and differentiating
until it has literally reproduced the whole. Development
is the making visible of the latent potentialities the intrinsic
manifoldness of the liberated fragment, or sample, or cell ;
and while the development of a fertilised egg-cell into an
organism remains to us one of the wonders of the world,
we venture to suggest that the development may be profitably
thought of as a continuation of the processes which are always
going on to preserve the specific organisation in good repair.
Every gradation between the two may be found in the
phenomena of regrowth or regeneration of lost parts. But
when we associate this capacity of development with growth
and multiplying we see that we may unite them all in the
conception of cyclical development, which Huxley was wont
to emphasise in his discussions of the characteristics of living
creatures.

From a microscopic egg-cell an embryo plant develops;
the ovule becomes a seed, the seed a seedling; by insensible
steps there is fashioned a large and varied fabric of root
and stem, leaves and flowers. But no sooner has the edifice
attained completeness than it begins to crumble. The grass
withereth and the flower thereof fadeth, and soon there is
nothing left but the seeds, which begin the cycle anew. It

THE CRITERIA OF LIVINGNESS 95

is, Huxley said, " a Sisyphean process, in the course of which
the living and growing plant passes from the relative sim-
plicity and latent potentiality of the seed to the full epiphany
of a highly differentiated type, thence to fall hack to sim-
plicity and potentiality again ". So is it also among animals.
The microscopic egg-cell divides and re-divides, and there is
built up an embryo. This may develop steadily and directly
into the likeness of its kind, or it may give rise to a divergent
larval phase such as we are familiar with in caterpillars
and tadpoles. Through more or less critical phases of ado-
lescence the adult stage is reached, and it is a not infrequent
achievement to lengthen out this period of full epiphany
and freedom. But whether the creature's life is counted
in days or in months, years or centuries, there is for most
an ascending and a descending curve from the vita minima
of the egg-cell (which often dies in a few hours if it be
not fertilised) to the vita minima of senescence or to the
not less frequent terminus of violent death.

In reference to Sir Michael Foster's definition, " A living
thing is a vortex of chemical and molecular change ", Pro-
fessor Bateson points out that the living " vortex ' differs
from all others in the fact that it can divide and throw off
other " vortices ", through which again matter continually
swirls (1913, p. 40). The parallel, he says, may be carried
even further, for a simple vortex, like a smoke-ring, if pro-
jected in a suitable way, will writhe into two rings. " If each
loop as it is formed could grow and then twist again to form
more loops, we should have a model representing several
of the essential features of living things' (1913, p. 40).
It has to be added, as we have seen, that the living vortex
is the seat of complex and specific chemical changes which
are correlated in such a way that the creature lasts.

96 THE CRITERIA OF LIVINGNESS

This power of persisting on its own path a sort of pro-
toplasmic inertia is very fundamental. It has received
remarkable illustration in the astounding facts established
in regard to the continued life of excised or explanted
fragments or even cells. Pieces of skin, drops of blood,
fragments of embryo may with proper precautions be kept
alive for months.

Is there any unifying concept behind these extraordinary
powers of growing, multiplying, developing, and growing
again ? The well-known physicist, Professor Joly of Dublin,
made many years ago (1891) the very interesting sugges-
tion that the living creature has a unique power of accumu-
lating energy acceleratively. " The organism is a configu-
ration of matter which absorbs energy acceleratively, without
limit, when unconstrained ' (p. 79). If we heat a piece
of iron or charge a Leyden jar, the process becomes more
and more difficult as we go on. " The transfer of energy
into any inanimate material system is attended by effects
retardative to the transfer and conducive to dissipation."
But the young leaf growing in the sunlight utilises the solar
energy acceleratively; the more it gets, the more it grows,
and the more it can take. " The transfer of energy into any
animate material system is attended by effects conducive
to the transfer, and retardative of dissipation." On what
this peculiar power depends Professor Joly does not tell us
that would be the secret of life; but it is very interesting
to get from a physicist a clear statement of the dynamic
contrast between animate and inanimate material systems.
The animate system is aggressive on the energy available
to it, spends it with economy, and invests it with interest,
till death finally deprives it of all."

THE CRITERIA OF LIVINGNESS 97

5. Effective Behaviour, Registration of Experience,

and Variability.

So far we have sought to arrange in a logical way certain
insignia of organisms. Absolutely fundamental is the power
of persistent individuality in spite of ceaseless change.
There is a unifying idea of persistence or of functional
inertia. This led us to consider growth, multiplication, and
cyclical development. Here, perhaps, there is a unifying
idea of accumulating potentialities. We have now to recog-
nise that living creatures are characterised hy effective be-
haviour, registration of experience, and variability. The
common note in this triad of qualities may not be obvious,
but is it not agency, self-expression, creativeness ?

(a) Life is a kind of activity which comes to its own in ef-
fective behaviour, that is to say, in an organically determined
correlated series of acts which converge towards a definite re-
sult. Behaviour is seen at many levels and in diverse modes,
which will be discussed later, but its common features are
correlation, concatenation, individuality, and purposiveness.
Big words, indeed, for the Amoeba gliding along on the mud
of the duck-pond. And yet, if we take this Amoeba, and
lay aside the contempt which superficial familiarity breeds,
we find that we are only beginning to make its acquaintance.

Professor Jennings describes a large Amoeba, a, which had
imperfectly swallowed a smaller one, 6. The prisoner moved
as if trying to escape, the swallower moved as if trying to
prevent it. Finally the small one did get completely out
again, whereupon the large Amoeba, a, reversed its course,
overtook 5, engulfed it completely, and started away. The
small Amoeba, again imprisoned, lay still until through the
movements of a there happened to be but a thin layer of

98 THE CRITERIA OF LIVINGNESS

protoplasm between it and freedom. It then broke loose,
escaped completely, and was not further molested. If this
behaviour had been described and even drawn by a tyro,
we might have distrusted it entirely, but when we have it
from a master in the difficult art of observing Protozoa,
we must give it careful consideration. Without saying any-
thing just now about the Amoeba's mind, must we not agree
that this concatenation of following, catching, losing, chasing,
re-capturing, and losing again is either behaviour or magic?

Most living creatures show more behaviour than is gen-
erally supposed, but many of them, plants especially, have
little. We often complain that they do not show any inter-
esting habits when we are watching them. This may be
admitted, however, without affecting the general truth of the
statement that organisms are characterised by a capacity for
effective behaviour. That many men run their lives, or
have to run their lives with a minimum of thinking, does
not affect the general truth of the statement that men are
characterised by a capacity for rational discourse.

(b) The effectiveness which characterises the behaviour of
those organisms that show enough to be profitable subjects of
study, appears to depend on profiting by experience in the in-
dividual lifetime, or on the entailed results of ancestral ex-
periments (chiefly, perhaps, in the form of germinal varia-
tions), or, usually, on both. The registration of experience
and experiments is one of the insignia of organisms, but
we must include under the term organism the germ-cell,
which is an implicit organism, a microcosm corresponding
to the macrocosm which develops from it. We must include
the germ-cells because, so far as we can judge at present,
many if not most new departures of importance have had
their origin as germinal variations. If the word ' experi-

THE CRITERIA OF LIVINGNESS 99

ment ' be inadmissible, some other will serve. We refer
to the permutations and combinations, the adjustments and
compromises, the subtractions and additions that seem to
occur in the history of the germ-cells.

As W. K. Clifford said, " It is the peculiarity of living
things not merely that they change under the influence
of surrounding circumstances, but that any change which
takes place in them is not lost, but retained, and, as it
were, built into the organism to serve as the foundation
for future actions." As Bergson puts it, " Its past, in
its entirety, is prolonged into its present, and abides there,
actual and acting." As Jennings says, from the physiologi-
cal point of view, in discussing the behaviour of the brainless
starfish, " The precise way each part shall act under the
influence of the stimulus must be determined by the past
history of that part ; by the stimuli that have acted upon
it, by the reactions which it has given, by the results which
these reactions have produced (as well as by the present
relations of this part to other parts, and by the immediate
effects of its present action). We know as solidly as we
know anything in physiology that the history of an organism
does modify it and its actions in ways not yet thoroughly
understood, doubtless, yet none the less real. 7 '

/ \J

(c) The crowning attribute of life and the most elusive
is variability, the organism's power of producing something
distinctively new. At present we must take it as ' given '.
The capacity most like it is Man's power of mental experi-
ment, the secret of the artist, the musician, the poet, the
inventor, the thinker, and the true statesman.

A discussion of this innermost secret of life must be post-
poned till we come to consider the factors in evolution, but
two points may be noticed in the meantime. There is varia-

100 THE CRITERIA OF LIVINGNESS

tion and variation. There is a change wrought on the body
by some peculiarity of nurture, environment, or habit. That
is a modification, and, so far as we are aware, it is not
transmissible in itself or in any representative degree. So
this does not help us. There are also variations which
consist in the loss of some ancestral character, such as horns
or a tail, and we know that there are opportunities in the
history of the germ-cells for the dropping out of hereditary
items. There are also variations which consist in new
arrangements of ancestral characters, as when the progeny
of black and yellow rabbits are grey. Many apparently
novel features are just old characters in new guise. This
again is not difficult to understand in a general way. But
the kind of variation before which we are dumb is the
brusque origin of something distinctively novel, a new pat-
tern, an originality. And unless one is to make the assump-
tion that every character was given in the first organisms
and that evolution is only unrolling, time counting for
nothing, we are bound to assume that these momentous
new departures have been of frequent occurrence all down
the ages. Our suggestion meanwhile is simply an assump-
tion that organisms are essentially creative. Even the in-
organic has a tendency to complexify ; a fortiori the organic.
The chemist is always turning out new carbon-compounds,
the organism is an unconsciously inventive chemist. The
same chemical substance can sometimes crystallise in more
than one way we know the variety of snow crystals so,
but with infinitely more subtlety, may the germ-cell experi-
ment with its own architecture, or trade with its environment
in adventurous differentiation. Just as an intact organism
from the Amoeba to the Elephant tries experiments, so the
germ-cell, which is no ordinary cell, but an implicit organism,

THE CRITERIA OF LIVINGNESS 101

a condensed individuality, may make experiments in self-
expression, which we call variations or mutations. Such,
at least, is our present view of a great mystery.

What has all this to do with Natural Theology? Little,
perhaps, directly; but much indirectly. For a superficial
or flimsy conception of the essential characteristics of living 1
creatures means putting a bushel over one of the great
wonders of the world. A commonplace view of Animate
Nature is an impiety, and a mechanical view is a gratuitous
complication of the problems of existence. Geniuses like
Nietzsche of yesterday and D'Annunzio of to-day have ad-
mitted the darkening of their eyes by a mechanical view
of life, accepted as scientific. We seek to show that it need
not be accepted.

But there are three concluding remarks that we wish to
make:--(a) The subject is not yet a matter of exact science,
and we do not say that ours is the true or the truest way
of stating the criteria of organisms. It is the best answer
we personally can give for the time being. Some would
state, more definitely than we have done, that all organisms
are psycho-physical beings. And others would reject, erro-
neously, we think, all such categories as individuality, be-
haviour, experience, experiment, and self-expression.

(6) Secondly, when we say that an organism has the
capacity of retaining its integrity in spite of ceaseless metab-
olism, we do not explain this capacity. If we could we
should know the secret of life, which remains hidden from us.

(c) Thirdly, our description of the general characteris-
tics of living creatures remains too cold-blooded. Like every
analytical and formal treatment it falls far short of giving
an adequate idea of life in its concrete fulness. No one
who did not know plants and animals would gather from

102 THE CRITERIA OF LIVINGNESS

our statement any idea of their sparkle and subtlety and
surprises. For that requires more than science. We must
use our everyday and our red-letter day experience of liv-
ingness both in ourselves and in other organisms, wherewith
to enliven sympathetically all that biology can give. We
need not be in the least afraid of engendering an exaggerated
idea of the wonder of life!

IN CONCLUSION.

No one can tell us wherein a living organism essentially
differs from a not-living thing. The one is alive, the other is
not. Perhaps we err in speaking too much about the un-
read riddle of life. For this seems to imply the expectation
that we shall be able some day to explain life in terms of
something else an expectation which is not likely to meet
with anything but disappointment. The materialists look
forward to explaining or re-describing the activity we call
living in terms of matter and motion. The animists look
forward to doing the same in terms of soul. But it is not at
all evident why we should be so very desirous to explain
life in terms of anything else, or why we should be sanguine
in making the attempt. Life is an aspect of reality which
found expression when there were evolved those particular
collocations of matter and energy which we call organisms,
just as Mind is an aspect of reality which found expression
when nervous systems of considerable degree of complexity
were established. We mean by Life and Mind the capacity
for certain kinds of activity and behaviour and internal ex-
perimenting with ideas, and it may well be that Life and
Mind are alike irreducible, and that they are not very differ-
ent from one another. But this is mere speculation. AYhat
is practically more important is to appreciate the character-

THE CRITERIA OF LIVINGNESS 103

istics of living creatures. Hence this inquiry into the criteria
of livingness. The bearing of this on modern Natural The-
ology is that an easy-going concept of ' organism ' is a dead
fly that may spoil many an ointment.

SUMMARY.

If we are to reach a coherent view of Nature, such as could be
included in a philosophy, we must arrive at some definition of the
characteristics which mark off living organisms from their not-living
surroundings. In the present state of science this definition cannot
be more than tentative, but it must be continually attempted.

Living may be described as a twofold relation of action and re-
action between organisms and their environment, and living crea-
tures are always active towards two main results, self -maintenance
and the continuance of their race. But the difficult question is:
What are the insignia of living creatures?

The first is the power of persisting in a complex specific metabo-
lism, and in a corresponding specific organisation, (a) The essential
metabolism of life has to do with the up-building and down-break-
ing of protein substances in a colloid state, (b) Each living
creature has its own chemical individuality and its own specific
microscopic and ultra-microscopic architecture, (c) Part of the
secret of life is a correlation of chemical processes so that in
spite of ceaseless change the organism persists in its integrity
for days or years or centuries. It is always burning away; but
it is not consumed.

Secondly there are the capacities of (a) growth, of (b) re-
production, and of (c) development a triad of qualities. (a)
Organic growth, an increase in the amount of organised living-
matter, is at the expense of materials different from those which
compose 'the growing substance; it implies active assimilation
rather than passive accretion; it is very definitely a regulated
process. (b) The power of spontaneous division leading on,
directly or indirectly, to the origin of new individualities is
one of the momentous distinctions between the living and the
not-living, (c) Development is the actualisation of the intrinsic
manifoldness of the liberated fragment, sample, or cell, and may
be brought into line with the process of repairing the specific
organisation.

104 THE CRITERIA OF LIVINGNESS

Thirdly, there is another triad of qualities (a) effective be-
haviour, (b) registration of experiences and experiments, and (c)
variability. The common note here is agency, self-expression,
creativeness. (a) Behaviour, exhibited at many levels and in
diverse modes, is an organically determined concatenated series
of acts converging towards a definite result. Its common fea-
tures are correlation, individuality, and purposiveness. (b) The
effectiveness which characterises organic behaviour depends on
the organism's power of profiting by experience in the individ-
ual lifetime, or on the entailed results of ancestral experiments
(chiefly perhaps germinal variations), or, usually, on both, (c)
The crowning attribute and the most elusive is variability, the
organism's power but, more accurately perhaps, the germ-cell's
power of giving rise to something distinctively new.

LECTURE IV.
ORGANISM AND MECHANISM.

LECTUKE IV.
ORGANISM AND MECHANISM.

1. Is Organism More than Mechanism? 2. Chemical and
Physical Laws apply to Organisms. 3. Some Difficulties in
the Application of Physical and Chemical Formula to Organ-
isms. 4. Criticism of Mechanistic Descriptions of Everyday
Functions. 5. Criticism of Mechanistic Descriptions of
Animal Behaviour. 6. Difficulty of Applying Mechanistic
Formula to Development. 7. Difficulty of Applying Mecha-
nistic Formula to Organic Evolution. 8. Answers to Criti-
cisms.

1. Is Organism More than Mechanism?

ACCORDING to Kirchhoffs famous definition (1876), the
task of mechanics is " to describe completely and in the sim-
plest manner the motions which take place in nature ".
When we give a mechanical description of an occurrence
the eruption of Vesuvius, the bursting of the broom-pods,
or the curling of the non-living tendrils of a mermaid's purse
it is in terms of matter and motion, or in chemico-physical
terms which are believed to be reducible to those of matter
and motion. The mechanical account is as such entirely
satisfactory when it enables us to see a process as a con-
tinuous series of necessarily concatenated mechanical opera-
tions like those which occur in the slow movement of a
glacier, or like the successive explosions which mark the
extension of a rapidly spreading conflagration. We shall
use the slightly wider term mechanistic to include either a
matter-and-motion description, which is in the strict sense
mechanical, or a more dynamical description in which the

107

108 ORGANISM AND MECHANISM

concept of energy is emphasised, or a chemico-physical de-
scription which is ideally mechanical, that is, theoretically
reducible to matter-and-motion description, though, as a mat-
ter of fact, the reduction may not have been as yet effected.
A mechanistic description, in short, is in terms of the funda-
mental concepts of physics and chemistry; and it is the
most precise and most thorough kind of description that is
known.

Given three good observations of a comet, an astronomer
who knows his business can prophesy with certainty when,
barring accidents, it will return. He may not tell us what
gravitation means, or what the comet is made of, or how
it arose, or what it portends to mankind, but of the com-
ing and going he gives a complete account, as the punctual
return of the comet afterwards proves. Now the question
which interests us at present is not whether the biologist,
if he knew his business as well as the astronomer, could
tell us at what precise date next spring the swallows will
reach our shores, but rather whether the success of his predic-
tion depends on the reduction of the swallows' behaviour
to mechanistic formulation.

The question may be split into two. The first is: How
far, as a matter of fact, can characteristically vital occur-
rences, such as the contraction of a muscle, be described in
terms of the formula which serve for the study of tides
and eclipses, the moulding of a dew-drop or the making of
a star ? One obvious limit is that, if the organism has mental-
ity that counts in its agency, then the behaviour cannot be
completely formulated in mechanical terms. Mind cannot
be described in terms of matter, or emotion in terms of mo-
tion. As there are some biologists, such as Prof. Jacques
Loeb, who hold " a tropism theory of animal conduct " which

ORGANISM AND MECHANISM 109

does not recognise mental factors as verce causes at all, and
as there are organisms and vital activities which are not
known to have any mental aspect, we shall leave this limit
to mechanistic description for future consideration.

So the first question is whether, mentality apart, there are
irreducible peculiarities in vital activities peculiarities
which cannot be adequately accounted for in terms of
physico-chemical or ideally mechanical description ? Or is
the usually admitted incompleteness of the physico-chem-
ical description of, let us say, a reflex action merely tem-
porary, and likely soon to disappear?

The second question is a little different. Of the move-
ments of the heavenly bodies Gravitational Astronomy gives
mechanical descriptions which are practically exhaustive
and almost perfectly useful. Now, supposing there were
available a complete mechanical account of, say, the open-
ing of a Yucca flower, would that be all that is wanted in
Biology ? Would light have been thrown, for instance, on
the fact that only one Yucca flower opens on each plant
each evening, that the flowers begin to open when the Yucca
moths begin to emerge from their cocoons, that the life of
the flower and the life of the moth are closely bound up
together, so that the one without the other is not made
perfect ? The Yucca flower and the Yucca moth are or-
ganisms with a history; they have come to work into one
another's hands. Are their adaptive relations only different
in degree from the dynamical relations between Earth and
Moon, or must we admit that the answers to distinctively
biological questions do not follow from even a complete
ledger (were that available) of the chemical and physical
transactions ?

110 ORGANISM AND MECHANISM

2. Chemical and Physical Laws apply to Organisms.

The apartness of living creatures was stated by Kant in
a famous passage. " It is quite certain that we cannot be-
come sufficiently acquainted with organised creatures and
their hidden potentialities by aid of purely mechanical
natural principles ; much less can we explain them ; and
this is so certain, that we may boldly assert that it is absurd
for man even to conceive such an idea, or to hope that a
Newton may one day arise able to make the production
of a blade of grass comprehensible, according to natural
laws ordained by no intention ; such an insight we must
absolutely deny to man ' (Teleological Faculty of Judgment,
74). We wonder how much of this he would have
written had he known the bio-chemistry and bio-physics of
to-day.

It is now recognised by all vitalists included that
chemical and physical laws apply to 'living creatures to
what may be called their inorganic aspect. There is no
confusion of ' categories ? in so doing. Chemically regarded,
the living creature is of a piece with its surroundings ; it
contains no peculiar elements. The most essential sub-
stances, which are always present, are proteins, but there
is nothing rare in their composition, just the carbon,
hydrogen, oxygen, nitrogen, and so on of the surrounding
world. The peculiarity of proteins is in the complexity
of their molecules, which consist of a large number of
atoms, and in their general occurrence in a colloid state,
which has very important physical properties. It used to
be thought that organic substances could be made only by
the direct touch of life, but the synthetic chemist has built

t/

lip samples of most of the difTt rent kinds with the exception

ORGANISM AND MECHANISM 111

of natural proteins. Even these are being approached, and
their synthesis will probably be effected too.

Chemically regarded, living involves a complex of re-
actions in, or associated with the material which we call
i protoplasm ' and some of these reactions can be re-
produced apart from the organism altogether. There are
oxidations and reductions, hydrations and de-hydrations,
fermentings and so on, which taken separately may be
mimicked in the laboratory. By freezing tissues, grinding
them in a mortar, and thawing and filtering the result, a
non-living material can be obtained in which some chemical
reactions go on. These can be studied in isolation, and
this is one of the everyday methods of bio-chemistry.
Similarly, chemical laws are of indispensable assistance in
enabling us to understand how the blood carries oxygen and
carbon dioxide and how digestive juices change the food in
the stomach.

In the same way it is certain that well-known physical
processes occur in the living body. Capillarity plays some
part when sap ascends in a tree, and evaporation plays some
part when the leaves droop in the summer heat. Surface-
tension is illustrated when an egg-cell becomes spherical,
and the elasticity of connective tissue when a hen turns
suddenly from scanning the sky to inspect a minute seed
on the ground at her feet. We illustrate the action of levers
when we walk, and the properties of lenses when an image
is formed on our retina. All physiologists are agreed that,
in the description of bodily functions, the formula? of
chemistry and physics carry us some way.

And just as the fundamental chemical fact, that no in-
crease or decrease of matter ever occurs in a closed system,
holds true for the living body and its environment, so it

112 ORGANISM AND MECHANISM

seems to be with the conservation of energy. An animal,
such as a dog, supposed for the sake of simplicity to be at
rest, takes in potential energy in the form of food, and takes
in oxygen to keep the vital combustion agoing. It uses up
the energy in internal activities: the heart drives the blood
round the body, the midriff rises and falls, the lungs empty
and fill, and so on. Now, if we allow for the potential
energy of waste-products and storage-products, we find that
the heat given off is in accurate correspondence with the
energy taken in. The accounts balance. The invention
known as a calorimeter made it possible for Rubner to dem-
onstrate that the heat-energy given off by an animal during
a prolonged experiment was the equivalent of the food taken
in, with a discrepancy of only 0.5 per cent., which is believed
to be the all but inevitable discrepancy due to the conditions
of experiment. There was a smaller discrepancy (0.1 per
cent.) in Atwater's experiment of sixty-six days during
which his students worked in a calorimeter. When they re-
mained at rest, the discrepancy disappeared. It is plain,
then, that the living of the animal is in general accordance
with the big generalisation that the sum total of energy
in a closed system remains constant. One mode may change
into another mode, but no energy ceases or is lost in the
transformation.

It is certain that a chemical and physical description
can be given of much that goes on in organisms, and this
kind of description will certainly extend its scope. We need
only refer to Professor Bayliss's Principles of Physiology
as a fine illustration of the application of chemical and
physical analysis to the activities of the living body, and to
Professor D'Arcy Thompson's Growth and Form as its
counterpart in the domain of morphology. At the same time

ORGANISM AND MECHANISM 113

it is important to notice that the working out of the cheinico-
physical description of vital activity is not altogether plain
sailing. Let us illustrate.

3. Some Difficulties in the Application of Physical and
Chemical Formulas to Organisms.

It is a general fact of experience that the rate of chemical
reactions is accelerated by heat and retarded by cold. The
illustrious chemist Van't Hoff formulated the law that the
rate of a chemical process increases in geometric progres-
sion when the temperature is increased in algebraic progres-
sion. The velocity of the reaction may be doubled or trebled
by a rise in temperature of 10 C. or reduced by one-half
or more by a fall in temperature of 10 C. Now it has been
observed that the rate of heart-beat of various animals, so
widely separated as tortoise and water-flea, is reduced to
about a half if the temperature be lowered 10 C., and the
same holds of some other vital processes. Therefore it has
been hastily concluded that the chemical processes associ-
ated with vital activities follow Van't Hoff's law in the way
they vary in rate with changes in temperature. But it
looks as if the conclusion had been premature. The increase
in the rate of development of the eggs of the plaice is
directly proportional to the increase in the temperature
within the limits of viability (Dannevig, Johansen, Krogh) ;
it does not illustrate Van't Hoff's law. In certain fishes, in
frogs, water-beetles, and sea-urchins the Danish physiologist
Krogh finds that the relation between the temperature and
the rate of development cannot be expressed, even approxi-
mately, by Van't Hoff's formula. According to Krogh's ex-
periments on frogs and goldfishes and some other animals,
the influence of temperature on the t standard ' metabolism,

ORGANISM AND MECHANISM

of which the absorption of oxygen is taken as an index, is
regular and constant, and cannot be expressed either by
Arrhenius's formula or by the rule of Van't Hoff. Ege
and Krogh have shown that Van't Hoff's rule does not apply
to the relation between temperature and the respiratory
exchange in goldfishes. Indeed, there are many cases where
\ 7 an't Hoff's rule does not seem to apply. It is said to held
good for such a subtle thing as the rate of cell-division in
the growing point of a root, but this is not to be taken as
indicating a simple chemical process. There appears to be
a repertory of intricate processes, the peculiarities of which
are mutually neutralised.

There are also some difficulties in regard to the trans-
formations of energy in living creatures that make one hesi-
tate to assert dogmatically that conclusions based on a study
of the inorganic must hold true for organisms. It is pos-
sible, for instance, that living cells may act selectively in
relation to the molecules that bombard them, and that the
organism may be able in some measure to evade the sec-
ond law of thermodynamics.

The best steam-engine is only able to change about 12
per cent, of its income of potential energy into work; the
animal can change about 25 per cent, and is therefore from
this point of view quite remarkably efficient. Moreover,
as Professor Soddy points out, the organism has a capacity
for dealing with kinds of chemical substances which cannot be
converted by inanimate agencies into useful forms of energy
without terrible waste. " The chemical energy of food suf-
fers direct transformation into work without first being
converted into heat."

In any case it is well to remember that while there is a
general, and for certain purposes very useful, applicability

ORGANISM AND MECHANISM 115

of chemical and physical laws to the activities of organisms,
there are also in organisms novel circumstances which seem
to alter cases.

In this connection, the Italian physicist and mathema-
tician Enriques writes (1914, p. 376) : " Only a few general
physical relations, persisting through all varieties of condi-
tions, are found to be verified without change in the realm
of biology, as, for example, the conservation of matter and of
energy. But among the less extended laws that refer to
diffusion or osmosis or electric conductivity, etc., we meet
at every step with exceptions and apparent contradictions."
He refers, for instance, to the fish known as the Torpedo, as
" a living Leyden jar ", and says : " While the functioning of
an electrical machine is so easily hindered by the moisture
of the insulator, here we see a charge which is not lost in
the watery fluid with which the tissues of the animal are
saturated." The living cells of the bladder hinder the dif-
fusion of water : " We can only say that a moist tissue
prevents the passage of water "by virtue of being alive,, for
it loses this property as soon as death has taken place."
Enriques also refers to the work of Galeotti, who has shown
that protoplasm hinders the diffusion of certain substances,
and in certain cases offers an especial resistance to the
ions moved by electro-motor force. It may be said that these
difficulties are due to the particularly complex conditions.
But in the meantime it is not unscientific to state that the
* analytical explanation ' is not as yet forthcoming. What
is gained by advancing to a ' synthetic explanation ', which
starts with the fact of life, is another question to be con-
sidered later on.

So far, then, our conclusions are, (1) that many chemical
and physical processes go on in the living body which are

116 ORGANISM AND MECHANISM

quito in line with those that occur in conditions apart from
living creatures altogether; but (2) that at present, without
going far, we are met by certain difficulties which suggest
that we should be cautious before concluding that the phy-
sico-chemical re-descriptions of vital events are adequate or
on the way towards adequacy. It is certain that some bodily
occurrences admit of mechanistic description and that this
is very useful, both practically and theoretically. Thus the
production of animal heat, which was a riddle to the old
physiologists, has in great measure been accounted for just
as one might account for the heat in a basin of water after
electric discharges have been passed through. The clearing
up of this problem may be practically useful to us on a cold
day or to our physician if we are fevered. It has also been
theoretically useful in the science of physiology, for in-
stance because it brought into prominence the more intricate
problem of the regulation of the body temperature, which
does not seem to admit at present of mechanistic solution.
This example seems to us to be typical. Along many lines
we advance so far with mechanistic formulation, and then
we are suddenly pulled up. Let us, then, methodically test
the mechanistic descriptions of occurrences in the realm
of organisms, keeping in view both the degree of complete-
ness in the descriptions and their relevancy in biological
study. It will conduce to clearness if we omit in the mean-
time all reference to conscious control. Let us consider (1)
the everyday functions of the body, (2) animal behaviour,
(3) development, and (4), very briefly, evolution.

ORGANISM AND MECHANISM 117

4. Criticism of Mechanistic Descriptions of Everyday

Functions.

There has not yet been given any physico-chemical descrip-
tion of any total vital operation. Soon after the establish-
ment of the doctrine of the conservation of energy, about
the middle of the nineteenth century, there was a remark-
able mechanistic boom. The impression became prevalent
that the citadel of life was about to be taken by storm.
Nerves were like wires along which electricity flowed ; the
kidney was a group of filters; respiration was a matter of
the diffusion of gases ; the passage of digested food from
the alimentary canal to the blood-vessels was a process of
osmosis ; and so on.

The inevitable reaction followed ; it was found that things
were not so simple as they seemed. The physico-chemical
descriptions leave out a good deal big residual facts which
seem to many to be the crucial facts. Dr. J. S. Haldane
writes : " The application to physiology of new physical
and chemical methods and discoveries, and the work of
generations of highly-trained investigators, have resulted
in a vast increase of physiological knowledge, but have shown
with ever-increasing clearness that physico-chemical ex-
planations of elementary physiological processes are as re-
mote as at any time in the past, and that they seem to
physiologists of the present time far more remote than they
appeared at the middle of last century' (1913, p. 47).

In his contribution to Life and Finite Individuality
(1918), Dr. J. S. Haldane says (p. 13) : " I need only refer
to such activities as the oxidative processes in living tissues,
the processes of secretion and absorption, or reflex action.
There is a prevalent idea that the progress of chemistry,

118 ORGANISM AND MECHANISM

and particularly of physical chemistry, has furnished ex-
planations of these processes. This is most certainly not
the case. What physical chemistry has helped us to do is
to obtain measures of the processes in the living body; but
the results of measurements have been to show with ever-
increasing clearness that the processes in the living body
do not correspond with our conceptions of those in non-
living structures, and that we are not remotely in sight of
mechanical explanations of the former.

" As an example, I need only take the case of the exqui-
sitely thin and delicate living membrance which separates the
blood in the lung capillaries from the air in the alveoli or
air-cells of the lungs. A short time ago it was assumed
that this membrane plays only a passive part which we
regard a non-living membrane as playing, and allows oxygen
to diffuse through it just as a non-living membrane would.
On applying accurate methods of measurement we found
that, whenever there is need for an extra supply of oxygen,
as, for instance, during muscular exertion, the membrane
assumes an active role and pushes oxygen inwards, without
regard to the mechanical laws of diffusion. In this respect
the alveolar epithelium acts just like the epithelium of the
swim-bladder, or that of the kidney or any other gland, or
the alimentary canal. The progress of physical chemistry
is enabling us to distinguish sharply between physiological
activity and the processes occurring in non-living structures ;
and the establishment of the distinction is sweeping away
the easy-going mechanistic explanations which became cur-
rent during the latter half of last century." " On the whole,
there is no evidence of real progress towards a mechanistic
explanation of life."

The inadequacy of the mechanical description is apparent

ORGANISM AND MECHANISM 119

when we consider any function in its totality. There is a
correlated sequence of events, and it is the correlation that
is characteristic. One group of cells has not only to do its
own work, but has to keep in exact co-ordination with the
working of other groups, sometimes at a distance. It goes
without saying that we know a good deal about this internal
regulation we do not expect action without means but we
cannot give a complete chemico-physical account of it. It is
sometimes achieved by the nervous system, sometimes by the
blood, sometimes by internal secretions. Dr. J. S. Haldane
points out that " a minute and scarcely measurable increase
in the hydrogen ion concentration of the blood excites the
respiratory centre of a normal warm-blooded animal to in-
tense activity. Similar minute alterations in the con-
centration of water, or sugar, or sodium chloride, or hydro-
gen ions, kave a corresponding influence on the secretory
action of the kidney." It might be thought that a multi-
plication of items of facts of this sort would eventually give
us precisely what we want a coherent description of inte-
gration. But that is not in view as yet, for we have always
to unite the chemico-physical facts by vital links, by pos-
tulating primary properties of the organism, referred to in
Lecture III., which remain unreduced. Unless we do this
we cannot explain how the numerous activities work in a
variable way into one another's hands, how they are co-
ordinated in a harmonious result, how they are adjusted in
a regulatory fashion to the changeful environmental con-
ditions.

The temperature of a furnace depends upon the amount
of thorough combustion that can be made to take place with-
in a given time, and on the arrangements to prevent waste,
and so on. It can be kept from exceeding a certain limit, if

120 ORGANISM AND MECHANISM

the stoker cease to stoke or if the draught of air be less-
ened, or in other ways. Similarly, the temperature of the
body in a ' warm-blooded ' animal is automatically regu-
lated to a nicety so that, if it exceed the normal even by a
very little, we know that something is seriously wrong. But
there are great differences between the organism and the
furnace. Thus in the organism " the oxidation does not,
like ordinary chemical oxidation, increase or diminish in
proportion to the varying supply of oxygen brought to the
seat of oxidation, but is controlled by living cells ".

We can picture a complicated series of mechanical opera-
tions with here and there an intelligent workman who is
essential because what is required is like very intricate
shunting a regulation, an adjustment, a co-ordination. So
is it with the organism. We can give a chemico-physical
account of isolated processes, but we cannot give a connected
description of the whole without postulating the interven-
tion of living cells. Not hypothetical agents, like Clerk-
Maxwell's " sorting demons/' but observable living cells like
Amrebas.

Let us take another illustration. When we strike a match
we can give a complete chemico-physical account of the later
phases of the process, apart, that is, from our own intention
and movement. When we draw back our finger from a hot
iron, are we illustrating more than a very complicated form
of the match's response to the friction? According to Dr.
J. S. Haldane, we are. " In identifying stimulus and
response with physical or chemical cause and effect, the
mechanistic theory makes a gigantic leap in the dark."

When the sun's rays passing through a knot in a roof-light
set fire to a heap of cotton-waste and the flames spread till
they reach a barrel of gunpowder, which explodes, and other

ORGANISM AND MECHANISM 121

things happen, there is a chain of events which may be long
or short, intricate or simple, hut which is quite clearly
stateable in chemico-physical, i.e., theoretically mechanical,
language. But it is otherwise when a living structure
responds to a stimulus. " There is in reality no experi-
mental evidence whatsoever that the process can be under-
stood as one of physical and chemical causation. . . .
When we attempt to trace a connection we are lost in an
indefinite maze of complex conditions, out of which the
response emerges' (Haldane, 1913, p. 34). A very
familiar fact is that the same stimulus applied to two ap-
parently similar animals or to the same animal at different
times evokes different answers. We can indeed give reasons
for this, but the reasons are not mechanical reasons.

Why is it that we cannot adequately describe the life of
the organism in terms of chemistry and physics ? Let us
take an answer from the philosophical physiologist, already
quoted, Dr. J. S. Haldane, in his contribution to Life
and Finite Individuality (1918). Because the organism
" forms itself and keeps itself in working order and ac-
tivity ' (p. 14), and " the idea of a mechanism which is
constantly maintaining or reproducing its own structure is
self-contradictory' (p. 16). "Empirical observations with
regard to the behaviour of living organisms point clearly
to the conclusion that in each detail of organic structure,
composition, environment, and activity there is a manifesta-
tion or expression of the life of the organism regarded as a
whole which tends to persist. It is this manifestation which
distinguishes biological phenomena ; and, through all the
temporary variations of structure, activity, composition, and
environment, it can be traced more and more clearly with
every year of advance in biological investigation. We can

122 ORGANISM AND MECHANISM

trace it through the ordinary metabolic phenomena in living
organisms, as well as through the phenomena of senescence,
death, and reproduction' (p. 21).

The everyday life of any common animal is an extraor-
dinarily complex affair. " For what is a creature but a
great and well-disciplined army with battalions which we
call organs, and brigades which we call systems ? It advances
insurgently from day to day, always into new territory of
time and space often inhospitable or actively unfriendly ;
it holds itself together, it forages, it makes good its ex-
penditure of explosives, it even recruits itself, it pitches a
camp and strikes it again, it goes into entrenchments and
winter-quarters, it retreats and lies low, it recovers itself, it
has a forced march, it conquers ? (Thomson, Wonder of Life,
1914, p. 627). What the biologist wishes is not merely
a complete ledger of all the osmotic and capillary proc-
esses in the body, all the oxidations and reductions, all the
solutions and fermentations, though that will be a great
achievement he wishes a description of the organism's
daily march which will not ignore the correlated organismal
tactics or the strategy which, in some cases at least, lies
behind these.

5. Criticism of Mechanistic Descriptions of Animal

Behaviour.

Let us pass from the everyday functions of the body
to a connected series of external activities to animal 'be-
haviour, .a subject to which we shall return in the sixth
lecture. We know that a young British-born swallow which
leaves us for the south towards the end of summer may
return the following spring to the parish, even to the farm-
steading, of its birth, moved, who shall say by what deep

ORGANISM AND MECHANISM 123

compelling constitutional homesickness. Professor Yung of
Geneva took twenty bees from a hive near the lake, put them
into a box, and carried them six kilometres into the coun-
try, where he set them free. Seventeen returned to the hive.

V * f

some of them in an hour.

The fresh-water mussel carries her young ones in her outer
gill plate, and keeps them there, even long after they are
ready to emerge, until a stickleback or a minnow comes into
the immediate vicinity. When the fish comes near, the
mother-mussel, whom it is no libel to call i acephalous ',
liberates a crowd of the pinhead-like larva?, which swim out
into the water, snapping their tiny toothed valves, and
secreting viscid attaching threads. They have the begin-
nings of a nervous system; they are sensitised to some
stimulus from the fish ; thev fasten on to it and be;in an-

v O

other chapter of their life. Even in the laboratory, when
thev have been removed from the mother, thev become ex-

.' I-'

traordiuarily excited if a morsel of minnow be dropped into
the dish in which they are. They respond definitely to the
only stimulus which will enable them to continue their life.
In some North American fresh-water mussels only one par-
ticular kind of fish will serve the purpose of temporary host.
In the remarkable life-history of the liver-fluke of the
sheep, microscopic ciliated larvae emerge from egg-cases
which have fallen into water. These larvae have no organs
in the strict sense, no hint of a nervous system, and only a
few cells altogether. They have energy enough to go on
swimming for about a day in the water-pool. They may
come in contact with many things, sticks and straws, roots
of aquatic plants and various aquatic animals, but there is
(in Britain) only one touch to which they respond that
of the small fresh-water snail, Limncea iruncaiula, the only

124 ORGANISM AND MECHANISM

host that will enable them to continue their life-history.
When they touch the mollusc they work their way into it and
exhibit a remarkable succession of multiplications and meta-
morphoses. The point is that a minute, brainless creature
responds at once to the one stimulus which will enable it
to continue its life.

These instances have been taken from different levels:
the swallow is very intelligent and yet instinctive, the bee
is very instinctive and yet intelligent, the larval mussel has
just the beginnings of a nervous system, the larval fluke
has none. Our point is that we can find objectively analo-
gous kinds of behaviour at all levels of nervous organisation,
and that we have to do with a general capacity of living
creatures the capacity of enregistering past experiences
and experiments, either individual or racial, so that present
behaviour is influenced by them in very specific ways.
There are several characteristic features in behaviour which
appear to be beyond all mechanical description. The be-
haviour is made up of a succession of acts which are cor-
related in a particular sequence. At any one moment there
are chemical and physical processes going on, about which
we know or may know a good deal, but it is the bond of
union that eludes the chemist and physicist. To take items
in the process and reduce them (as far as we can) to physi-
cal and chemical common denominators is interesting in its
way, and for certain purposes useful, but it does not make
any clearer the interlinking, the co-ordination, of all the
items in a piece of behaviour. When we consider the larval
liver-fluke arrested by contact with the fresh-water snail
with a particular species of water-snail, or the larval mussel
arrested by the proximity of a minnow, or a stickleback, or,
it may be, by one and only one particular species of fish,

ORGANISM AND MECHANISM * 125

we are face to face with a common and characteristic fea-
ture in animal behaviour, that the creature is historically
tuned to be a receptor of a unique but absolutely indispen-
sable stimulus which may not occur more than once in the
life-history. We may find perhaps some analogies to this
in the inorganic world from our point of view it would
be strange if there were not but it is supra-mechanical.
By which we mean that it requires other than mechanical
concepts for its formulation especially the concept of the
organism as a historic being.

Sometimes, it must be confessed, even the postulate of
historic enregistering does not help us very much as yet,
witness the well-known riddle of the homing of birds. Prof.
J. B. Watson and Dr. K. S. Lashley took four nesting terns
(two ' noddies ' and two ' sooties ') from Bird Key in the
Tortugas to Havana, 108 miles off, and liberated them in
the harbour there. They were back at Bird Key next day,
having probably spent most of the time recuperating around
the shores of Cuba. Of five birds liberated off Cape Hat-
teras, in waters which these terns never visit, for Bird Key
is the northern limit of their migratory range, at least three
returned to their nests in a few days, having accomplished
a journey of 850 miles as the crow flies, and of much more
if the alongshore route was followed. Four noddies and four
sooties were taken in a hooded cage on a Galveston steamer
and liberated at a point in the middle of the Gulf of Mex-
ico, 461 statute miles from home, and out of sight of every-
thing. On release, all birds, with one exception, started east-
wards. That one headed westwards and continued for about
200 yards, then turned suddenly towards the east. The
birds had a strong head wind against them throughout the
first day, but two of them returned to their nests in safety

126 ORGANISM AND MECHANISM

across the waste of seas. This seems to us so different from
the return of the boomerang to the thrower's hand that we
venture to call it different in kind.

When we are dealing with higher animals, presumably
with conscious processes analogous to our own, the contrast
with a mechanism stands out even more clearly. An engine
overcomes hindrances, force against force, but it has no
resource, no alternatives, no tactics. But an organism with
a mind at work, a conscious organism, is different in its
relation to hindrances. As Dr. J. S. Haldane says, " It
is aware of, and avoids, neutralises, or even takes advantage
of them. It adapts its behaviour in such a manner as to
maintain itself in the presence of what is outside the mere
organic unity of its life. But in so doing the organism
shows itself to be more than a mere organism ; it includes
within the unity of its life what seemed to be independent '
(Life and Finite Individuality, p. 23).

6. Difficulty of Applying Mechanistic Formulae to

Development.

Our third test of mechanistic interpretation is with regard
to development. When we watch a transparent marine
animal, such as one of the Salps, we can see the movements
of internal parts the beating of the heart, for instance
and though what we see is not like anything in inorganic
nature, we are reminded of a smoothly-working machine
like a chronometer. On the other hand, when we have the
good fortune to observe a development actually going on in
perfect translucency, for instance in the egg of the moth
Botys Jiyalinalis, our unprejudiced impression must surely
be, that this is very far away from anything mechanical,
that it is in fact very unlike anything else in the world.

ORGANISM AND MECHANISM 127

When we take the most familiar case of all, the development
of the chick in the course of twenty-one days from a minute
drop of living matter lying on the top of the yolk the
gradual emergence of the obviously complex from the ap-
parently simple we feel how true it is still, what Harvey
wrote three centuries ago : " Neither the schools of physi-
cians nor Aristotle's discerning brain have disclosed the man-
ner how the cock and its seed doth mint and coin the chicken
out of the egg." It is not surprising that the facts of genera-
tion and development have often led naturalists to the con-
clusion that the categories of mechanism fall short in the
domain of the organic. What particular facts of devel-
opment seem to require more than mechanical description ?
There is the condensation of the inheritance into the micro-
scopically minute germ-cell an extraordinary telescoping of
individuality, of which we can form no image. It is quite
true that there is within egg-cells a demonstrable complexity
of organisation far greater than used to be supposed, that
the nucleus is a little world in itself, that there is a
growing knowledge of extremely minute, yet often distinc-
tive, organ-forming plastosomes in the cytoplasm of the egg,
that the artificial removal of part of the egg-cell is sometimes,
as in Ascidians, followed by the non-development of a partic-
ular structure in the embryo, and so on. More and more
we are coming to see in the germ-cell an implicit individ-
uality with complex and specific organisation. But no sooner
have we got this idea clearly focused in the mind than we
are confronted with such facts as those of merogony, that
a fragment of an egg-cell is able to develop into a normal
embryo. It may be an argumentum ad ignoraniiam, but
if it be held, as the mechanists hold, that the egg-cell is
completely describable as a chernico-physical mechanism of

128 ORGANISM AND MECHANISM

great complexity, it is not unfair to recall some of the dif-
ficulties, that the supposed mechanism, has to form in
fertilisation a working unity with another mechanism as
complex as itself; that it has thereafter to divide over and
over again; that a part is sometimes as good as a whole;
and so on. It is sometimes easy to get twins from one egg
by shaking the first two cleavage-cells apart, and even at
the four-cell stage of the lancelet's development the same
method may result in quadruplets. It almost seems as if we
here reached a Euclidean reductio ad absurdum of a mecha-
nistic interpretation.

The central problem of development is differentiation,
and the biological study of this is not more than incipient.
We cannot even elucidate the fact that the two cells into
which a germ-cell divides are sometimes exactly alike and
sometimes distinctly different. Out of apparent simplicity
there gradually emerges obvious complexity. As Roux puts
it, there is a self-manifestation of intrinsic manifoldness.
What was a clear drop a few hours ago is now a manifest
organism with nerve and sense-organ, food-canal and muscle.
It is the most wonderful thing in the world. Sometimes the
whole scene has changed when we return to observation
after the interruption of an hour's lecture. Be it under-
stood that no theory explains it, but while the biological
interpretation may try with some success to bring devel-
opment into line with, say, the organism's characteristic self-
repairing activity, the mechanistic interpretation has not
yet begun its task. It is a mere impious opinion that devel-
opment will one day be described in terms of mechanics.

Another prominent fact in development is its regulated-
ness or correlation. Driesch and others have directed at-
tention to the power the embryo often shows of righting it-

ORGANISM AND MECHANISM 129

self after the building materials of its edifice have been
artificially disarranged, of re-adjusting itself after the
proportions have been artificially disturbed. A fertilised
egg-cell frequently divides into a ball of cells like a micro-
scopic mulberry fruit; the constituents of this ball may be
disarranged and the ball pressed out of shape between two
glass plates ; yet if the interference be not too prolonged,
the developing embryo may right itself and develop nor-
mally. Can we think of a machine which is practically unaf-
fected if we cut off half of it, -or which, being scrapped,
patiently re-arranges its parts and begins over again !

If the developing organism is in its behaviour ' cona-
tional ' -that is to say, on the way to being ' purposeful 7
the difference between it and a developing sidereal system is
great. But what grain of evidence is there of this i cona-
tional ' element ? Not perhaps very much when we confine
our attention to normal embryonic stages, where one phase
appears to be the natural and necessary outcome of its ante-
cedent. But we get another impression when we consider
some of Driesch's cases of self-regulation and of re-adjust-
ment after profound dislocation.

Whatever we make of it, one of the marvels of devel-
opment is the manner in which separate parts are often
correlated, as it were conspiring together towards some fu-
ture result. In the making of the Vertebrate eye, an outgrowth
from the brain forms the retinal cup, an independent in-
growth from the skin forms the lens, some mesoderm cells
migrate into the interior to form the vitreous humour, others
combine to form the protective envelopes, and so on. Strange
anticipations of coming events are well known to embry-

ologists.

In a trivial detail, such as the making of the silk-like

130 ORGANISM AND MECHANISM

threads composing the skeleton of the common hath sponge,
large numbers of secretory cells called i spongohlasts ' group
themselves in double file every here and there through-
out the middle stratum of the sponge, as if some unseen
captain marshalled them. Up the middle of the double file
the spongin is secreted, made at the expense of the living
matter of the spongoblasts, and the many individual contri-
butions coalesce into a spongin-fibre.

In his Science and Philosophy of the Organism (1908),
Driesch has with unexampled thoroughness and subtlety
tested the possibilities of mechanistic description with
particular reference to the facts of development. He reaches
a conclusion of the first importance : " ISTo kind of causality
based upon the constellations of single physical and chemical
acts can account for organic individual development; this
development is not to be explained by any hypothesis about
configuration of physical and chemical agents. . . . Life,
at least morphogenesis, is not a specialised arrangement
of inorganic events; biology, therefore, is not applied
physics and chemistry; life is something apart, and bi-
ology is an independent science." But what, it may be said,
of the science of * developmental mechanics ' and of the
lengthening row of volumes entitled Arcliiv fur Entwick-
lungsmechanikf The first answer is, that, after all, the
developing embryo is a material system, and must exhibit
chemical and physical means. Development shows a continu-
ous action and reaction between an implicit organisation and
the environing conditions, and ' developmental mechanics '
so-called is in great part concerned with discovering the
correlation between steps in development and their ap-
propriate external stimulation and nurture. These cor-
relations are of great interest, but as our knowledge of them

ORGANISM AND MECHANISM 131

increases we do not get appreciably nearer a mechanical
description of development. We do, however, recognise more
and more that physical and chemical processes are in evi-
dence.

The second answer is that the word mechanical is some-
times applied illegitimately to a systematic or connected
account which displays a series of events in causal coherence
without the intervention of mentality. Given certain prop-
erties of organisms in general, of nerve-cells and muscle-
fibres in particular, we may give a more or less connected
and complete account of a reflex action without dragging
in any psychical agency. But this should not be called a
mechanical description. It is simply, what it pretends to be,
a physiological or biological description, and it implies
various non-mechanical concepts. Similarly, given the
organism's power of registration and of persistently re-
producing its specific organisation, given the cell's mysteri-
ous power of dividing of dividing now into similar, and
again into dissimilar halves, given the capacity of utilising
nurtural stimuli to educe the inherent manifoldness of the
germ, and so forth, we can make a show of discovering the
connectedness and inevitableness of the successive stages in
development. But we cannot without abuse of terms speak
of this as a mechanical description.

7. Difficulty of Applying Mechanistic Formula to

Organic Evolution.

As a fourth test of the adequacy of mechanistic description
in the realm of organisms, we may refer very briefly to
evolution, which will engage our attention in detail by and
by. Such phrases as ' cosmic evolution ' and t inorganic
evolution ' are apt to suggest the mistaken idea that organic

132 ORGANISM AND MECHANISM

evolution is simply a continuation of a historical inorganic
process of increasing differentiation and heterogeneity. It
may be continuous with it, but it is not a continuation of
it, any more than the evolution of human societary forms
is a continuation of the evolution of mammals. The issues
changed when organisms began, and again when man began.
Moreover, what is called, for instance, the evolution of
the solar system should rather be called the development
of the solar system, since it is the differentiation of one
mass into explicit manifoldness. The originative nebula
or whirling mass of planetesimals is comparable to a great
world-egg, to borrow Hume's phrase, and we may think of
it as developing into several embryos, as eggs sometimes do.
But, so far as we know, there was no struggle between the
various planets, or between them and their environmental
limitations. There was no sifting process which eliminated
some and left others surviving. Whether we speak of the
history, or differentiation, or development, or evolution of
the solar system, we must recognise that it was a very dif-
ferent process from organic evolution. In the former there
were no alternatives, no trial-and-error methods. There
was nothing comparable to the staking of individual lives
and losing them which is characteristic of that sublime ad-

o

venture which we call organic evolution. The theory of

O /

organic evolution starts with the assumption of variability,
which transcends mechanical interpretation and is perhaps
least obscure at present when we think of it most anthropo-
morphically as experimenting in self-expression. Moreover,
the organism is in some measure a genuine agent even in
the process of natural selection. It is often anything but
a passive pawn. It does not simply submit to the apparently
inevitable. It often evades its fate by a change of habit

ORGANISM AND MECHANISM 133

or of environment; it compromises, it experiments, it is full
of device and endeavour. The evolving organism is a his-
torical psycho-physical being, an agency trading with time;
and the humblest creatures are in their mutations creative.
Such mechanical description as is possible leaves the essential
features undescribed.

IN CONCLUSION.

The result of our consideration is that while mechanical
description has its place and utility in the organic domain,
it is inadequate to cover the characteristic facts of everyday
functioning, of animal behaviour, of individual development,
and of racial evolution. For all these demand other than
mechanical concepts.

Our study has led us away from the view that there is
only one science of nature, consisting of precise chemico-
physical descriptions which have been, or are in process
of being, summed up in mechanical or mathematical terms.
As it seems to us, there is greater utility and accuracy in
frankly recognising successive orders of facts, each with
its dominant categories. There is the domain of the inor-
ganic, the physico-chemical order, where mechanism perhaps
has it all its own way. There is the realm of organisms,
the biological order, where mechanism is checkmated by
organism. There is the kingdom of man, the social order,
where mechanism is transcended and personality reigns.
Another grouping would be inorganic, animate, and psychi-
cal, but we wish to emphasise the apartness of man which
has been obscured by the Darwinian theory true as that is.

These orders, which we separate that we may conquer
them scientifically, do as a matter of fact overlap. The
inorganic overlaps the organic, for organisms are material

134 ORGANISM AND MECHANISM

systems, and their living implies a concatenation of chemico-
physical processes. But organisms require a science for
themselves. The organic overlaps the human, for Man is
affiliated to mammals, and his personality is tethered to
protoplasm. But Man requires a science for himself. Or,
if one prefers it, the organic overlaps the psychical, since
the mind has a body, so to speak, and the spirit works in
part through the flesh. And, looking in the other direction,
who can be quite sure that the domain of the inorganic is
as thoroughly exhausted by mechanical formulation as is
usually supposed ?

The important point is that the sciences are differentiated
not merely by their subject-matter, but by their character-
istic questions and methods and concepts. In this sense we
claim autonomy for biology.

In so doing we are not in the least weakening the hope
and endeavour that biology may approximate more closely
to the position of an t exact science '. Our sole proviso is
that this is not to be attained by the nai've device of leaving
life out. The honourable rank of exactness is not to be
allowed to remain the prerogative of sciences which deal
with processes that can be described " by aid of elementary
corpuscles having ideal motions ". It may be attained by
all sciences that have resolutely begun to ' measure ', in-
cluding in ' measurement ' every form of precise registra-
tion. Thus not a little of modern psychology is very exact,
although a description of its subject-matter in terms of ideal
motions is certainly not its end! Biology is inexact com-
pared with gravitational astronomy, partly because there
have been more first-class minds among the astronomers than
among the biologists, partly because in biology we deal with
phenomena which are more difficult to measure than those with

ORGANISM AND MECHANISM 135

which astronomy deals, but mainly because biology has to
deal with individualities which are variable and spontaneous,
always to some extent unpredictable. It must be granted,
however, that there has been a strong modern movement
towards exactness even in the most difficult departments of
biology. There has been for a long time much exact science
in comparative anatomy and comparative physiology, but
the recent labours of the biometricians on the one hand, and
of the experimenters in genetics on the other, have already
done much to bring the study of evolution problems nearer
the ideal of exact science. In fact, as has been sagaciously
pointed out, biology has already become a science to a
degree that Kant deemed impossible, and this achievement
helps to keep the biologist from admitting the validity of
Kant's view that there is only one science of Nature.

8. Answers to Criticisms.

Our argument may perhaps be strengthened by meeting
some criticisms brought against what may be called the bio-
logical position.

(a) It has been suggested that those who think that vital
phenomena require special biological categories are under-
rating what physico-chemical material systems can do.
" Many a machine is constructed to oil itself the more copi-
ously when it works the faster, and the printing-press, as
we urge it to put out more newspapers on the one side,
pulls in more blank paper on the other ' ' (D'Arcy W. Thomp-
son, Life and Finite Individuality, p. 37). ISFow there is
undoubted utility in comparing a living creature with a
machine, especially a machine with automatic regulatory
arrangements. Both are systems effecting the transforma-
tion of matter and energy; both illustrate the co-operation

136 ORGANISM AND MECHANISM

of many parts to an effective result. But the living creature
is always working, even in dying, towards its own preserva-
tion; it can adjust its activity to varying needs and cir-
cumstances ; it can rest and begin again ; in normal conditions
it can give rise to another organism with activities like its
own. The explicit organism develops in appropriate condi-
tions from the implicit organism or germ-cell ; if disturbed
it can re-arrange itself ; if it loses a part it can replace it ;
if it is broken into fragments it can sometimes reconstruct
its living edifice.

(&) Those who claim autonomy for biology are sometimes
rebuked by a reference to the music of the spheres. We are
told that " in Nature herself, if we look at her larger handi-
work, self-regulation and self-maintenance become paramount
attributes and characteristics of her machines. The solar
system, qua mechanism, is the perfect specimen, the very
type and norm, of a self-maintaining, self -regulating mecha-
nism ; and so also, grade after grade, are its dependent
mechanisms, such as the world-wide currents of the atmos-
phere and of the sea ' (D'Arcy W. Thompson, Life and
Finite Individuality, p. 37).

The order and balance of Nature's larger handiwork
must indeed be recognised and admired. The same laws
that are used in formulating cosmic architecture and reg-
ularity may be usefully employed, as we have admitted, in
the realms of organisms. But our point is that the .animalcule
is in a way greater than all the stars, as stars, for it is an
agent, it has alternatives, it shows experimental indetermin-
ism, it commands its course. And when this began it was
something new in the world.

(c) But where, precisely, it is asked, does the mechanis-
tic description fail ? The answer is twofold, that as yet

ORGANISM AND MECHANISM 137

it fails all along the line in thoroughness of description,
and that it does not give us the kind of answer that as
biologists we want. Xo student of science could have any-
thing but delight in learning that the contraction of a muscle,
or a reflex action, or the movements of an Amoeba had been
satisfactorily described in terms of chemistry and physics.
But it has not been done as yet in the case of any single
vital activity. Diffusion plays its part in the interchange of
gases in the lungs, but the lining epithelium of the air-sacs be-
haves, Dr. J. S. Haldane tells us, in a way which modifies
diffusion processes, and that elusive modification keeps us
alive. In the second place, the mechanistic description, even
if it attained to the completeness of a ledger of all the chem-
ical and physical processes in a piece of behaviour, would
not thereby give us a natural history description of the
behaviour. We need historical or genetic concepts. So we
do not propose to sum up the ways of a starfish as those
of a physico-chemical machine.

(d) The distinctively biological position admits that phys-
ical and chemical formulae, concepts, or ' categories ' are
applicable to organisms, but argues that they are inadequate,
notably, for instance, because life is always in a sense his-
tory. But has not the line of physiological progress been
mechanistic? The answer is that it is part of the method
of science to ' abstract ', and that it has been of great service
to corner off and analyse physical and chemical operations
which occur in organisms. But the success that has attended
the" study of the chemistry of the blood or the study of the
optics of the eye, does not prove that the physico-chemical
description of a living creature is or can be adequate.

(e) A thoroughly sound criticism is, that the concepts of
physics and chemistry are not stationary but in process of

138 ORGANISM AND MECHANISM

development, so that any argument we use to-day about the
' irreducibility ' of vital phenomena refers only to modern
chemistry and physics (unluckily, to be frank, to what we
happen to understand of that chemistry and physics). The
only answer to this criticism is that at any given time we
must use the science we have got. ISTo judgment in regard
to irreducibility can be prophetic, unless we feel confident
that we are dealing with generic differences, such as those
between a conscious organism and a crystal.

(/) Finally, some would ask whether it matters much
after all whether a chemico-physical formulation of a living
organism is possible or not. Is there any depreciation of
the " lily-muffled hum of a summer bee ' if it be " coupled
with the spinning stars " ? The answer is twofold : (1) that
science is all for veracity, and that the matter-and-motion
summing up of an organism seems to many to be at present
a false simplicity; and (2) that the treatment of a living
creature, say horse or dog, as exhaustible in chemical and
physical terms does not seem the way to get the most or
best out of them. A physician's success in treating his pa-
tient from the purely chemical aspect is often remarkable,
but it may be eventually necessary to recognise other aspects !

We agree, however, that what really matters is, that our
view of the living creature be thoroughly well-informed.
Whether our theoretical interpretation of it be, that it is
like a very subtle engine or an intricate solar system, or
that it is a system in which a new aspect of reality has mani-
fested itself so that special biological categories are required,
the most important thing is that we appreciate the facts of
the case. When the methods of theoretical discussion have
been exhausted, and it is doubtful whether they have ever
made any biologist change his mind from a position to which

ORGANISM AND MECHANISM 139

personal experience had led him, the practical conclusion
is that we must keep as close as we can to the observable
realities, for it is in touch with these that we are most likely
to get fresh light.

SUMMARY.

Chemically considered, the organism is of a piece with its sur-
roundings (though very much more complex than any mere thing) ;
it may be usefully studied by chemical methods; it exhibits many
chemical processes which can be studied in isolation. Similarly,
many well-known physical processes occur in the living body, and
there is in its activity no known contradiction of the law of the
conservation of energy. A chemical and physical (i.e., theoretically
mechanical) description can be given of much that goes on in the
living body, and this kind of description will certainly extend its
scope. At the same time, there are difficulties in this chemico-
physical description; some vital processes do not illustrate Van't
HofFs rule and it sometimes seems as if the organism were able to
effect some evasion of the second law of thermodynamics.

But while chemical and physical (ideally mechanical) description
has its place and usefulness in the organic realm, it is inadequate to
answer the distinctively biological questions. It does not cover
the characteristic facts of life.

If we consider the everyday functions of the body, we find that
there has not been given any chemico-physical description of any
total vital operation, such as the contraction of a muscle. We
cannot satisfactorily describe in mechanical terms either the con-
catenation of events in a function or the correlation of one set
of events with another set. This is still more marked when we
consider animal behaviour, with its co-ordination of acts in an
effective series.

As to individual development, we cannot give a mechanical de-
scription of the condensation of the inheritance into a germ-cell, or
of the differentiation of the embryo, or of the regulation-phenomena
observed when an embryo rights itself after the building materials
of its living edifice have been seriously disarranged, or of the way
in which many developing parts seem to conspire towards one result.
Similarly, as regards organic evolution, we cannot offer a mechanical

140 ORGANISM AND MECHANISM

theory of variability, and the process of selection is more than
mechanical sifting. The evolving organism is a historical psycho-
physical being, an agency trading with time; and the humblest
creatures are in their mutations creative.

The conclusion is thus arrived at, that mechanical formula do not
suffice for answering biological questions.

LECTURE V.
THE UNIQUENESS OF LIFE.

LECTURE V.
THE UNIQUENESS OF LIFE.

1. The Inadequacy of a Mechanistic Description of Organisms Is
a Negative Conclusion. 2. The Problem: Vitalism or Me-
chanism, or Neither? 3. Are Organisms Unique in Virtue
of their Complexity? 4. Have Organisms a Monopoly of
Some Peculiar Energy or Energies? 5. Is there a Non-per-
ceptual Vital Agency resident in Organisms and Operative in
distinctively Vital Activities? 6. Descriptive or Methodolog-
ical Vitalism: the 'Biological' View. 7. Speculative. 8.
Retrospect. 9. Why Cannot the Controversy between Mech-
anistic and Vitalistic Theory be Ended?

1. The Inadequacy of a Mechanistic Description of
Organisms Is a Negative Conclusion.

WE have considered the chief characteristics of living
creatures such as persistence in spite of change, cyclical
development, and effective agency. We considered the or-
ganism under the category of a material system to see how
that fitted, and we reached the conclusion that, while this
is a legitimate and useful way of looking at a living creature,
the formulae of physics and chemistry are inadequate for
the re-description of the everyday bodily functions, or of
behaviour, or of development, or of evolution. We did not
reach any conclusion as to the depth of difference between
organisms and not-living things ; our result was a negative
one, that the chemico-physical formula do not suffice for
answering the distinctively biological questions.

It is an unfortunate tendency of the human mind to re-
gard evidence against one theory as evidence in favour of

143

144 THE UNIQUENESS OF LIFE

another. This holds only when we are dealing with two
logical opposites, one of which must be true. Many times
over in the history of thought there has been a rebound
from mechanistic interpretation discovered to be inadequate,
and the rebound has almost always landed the inquirer in a
doctrine of positive vitalism, in the assumption that there
is some non-perceptual agency at work in a living body which
is not present in the inorganic domain, and without which
the results would be otherwise. We shall not jump to this
conclusion, but we must consider it carefully. In its clearest
form %t asserts the actuality of a ' vital principle ', or i vital
impulse ', or c entelechy ', of a non-perceptual character, oc-
casionally operating in living creatures and operating direc-
tively. Is this a tenable theory?

2. The Problem: Vitalism or Mechanism, or Neither?

Before we discuss the theories of vitalism, it may be use-
ful to refer to three preliminary considerations.

(a) It is maintained by some that mechanistic formula-
tion (i.e., description in terms of matter and motion) is
not exhaustive even within the domain of the not-living.
It seems to be adequate for certain purposes, e.g., when the
navigator deals with the tides, but is it certain that it is
an ideal formulation for things in general ? Does it take
account of everything, e.g., of the probability that the living
evolved from the not-living ? But the adequacy of mechanical
categories in the domain of the inorganic is a question for
expert physicists; it is not the biologist's business. Our
question is whether the formulae which work adequately,
if not exhaustively, in describing the not-living world, are
beginning to answer the distinctively biological problems.
If not, what alternatives are there?

THE UNIQUENESS OF LIFE l4<5

Secondly, there is a sense in which all biologists may
be called vitalists, inasmuch as no one can pretend that the
mechanical re-description of vital phenomena has as yet gone
very far. Professor Bateson writes : " If those who proclaim
a vitalistic faith intend thereby to affirm that in the processes
by which growth and division are effected in the body, a part
is played by an orderly force which we cannot now translate
into terms of any known mechanics, what observant man is
not a vitalist?" (1913, p. 80).

We must distinguish between a negative and a positive
vitalism. When we assert that no vital activity in i'ts ob-
served totality has ever been completely described in mechan-
ical terms, as one might describe the movement of a glacier
or the spread of a conflagration, we are making a scientific
statement which we believe to be accurate at the present
time (1919). That it will hold true a hundred or a thou-
sand years hence does not follow from the evidence sub-
mitted, for we do not know what changes are still to be
made in the concepts of chemistry and physics, or what dis-
coveries will reward inquiry into, for instance, the physiology
of correlation. It may be that a mechanistic formulation
of the essential activities of organisms is quite impossible,
but that could not be legitimately inferred from the argu-
ments we used. These went to show that the description
of vital occurrences in terms of present-day chemistry and
physics does not adequately express the connection of the
sequences, still less their correlation. We can speak only
about the chemistry and physics that we know. Sufficient
unto the day is the mechanism thereof. The formula of chem-
istry and physics prove inadequate, and in part irrelevant.
If we go on to say that they are inadequate because the
organism has a monopoly of a peculiar kind of energy, or

146 THE UNIQUENESS OF LIFE

because it has an entelechy, we are embarking on a new
adventure that of a positive vitalistic theory.

(c) It is held by some that it is the presence of con-
sciousness or some expression of mentality, that makes all
the difference, and here again there is probably a great truth
to which we point in using the term Animate Nature.
But the suggestion as it stands cannot be pressed in the
meantime, for the obvious reason that there are many living
creatures about whose mind or consciousness we cannot make
any secure statement, where even the argument from analogy
fails us. So it must be clearly understood that the problem
of vitalism is different from that of animism. The problem
of vitalism would remain even if the world held only plants
and no animals besides ourselves Jack and his beanstalk, in
fact. Now whatever we may believe, we do not know any-
thing about the mind of the beanstalk. Yet we may, and
do maintain that mechanistic formula? do not suffice to an-
swer our biological questions concerning the beanstalk.

Among those who hold that plants and animals stand
apart from things in general, we may distinguish three
grades. (I) The first view is that the configurations that
occur in organisms are so different from those in the inorganic
domain that the activities of organisms cannot be predicted
from any formulation of what occurs in inorganic systems.
This is the very thin edge of vitalism. (II) The second
view is that there operates in living creatures a new kind
of physical energy which does not operate elsewhere. This
is a lineal descendant of the medieval form of vitalism the
doctrine of a vital force. (Ill) There is the theory of a non-
perceptual vital agency or entelechy which operates direc-
tively in organisms. This is the clearest and the most thor-
oughgoing form of vitalism.

THE UNIQUENESS OF LIFE 147

If the term vitalism be restricted to (III), as many would
restrict it, and if a mechanistic theory mean that the cate-
gories of physics and chemistry suffice for the adequate de-
scription of the life of organisms (leaving mental processes
out of account), then we suggest that the proper answer to
the question " Mechanism or Vitalism ? ' is " Neither ".
We regard the question as one of the many false dichotomies
with which Man in his search after clearness has been led
astray. The biologist is not bound to accept either a Vital
Force Theory, or a Machine Theory; he may demand a
biological theory in terms of concepts neither transcendental
nor mechanical.

3. Are Organisms Unique in Virtue of their Complexity?

The first position, recognising, as every one must, a nota-
ble difference between an organism and a not-living thing,
finds the difference in the much greater material complexity.
The configurations of elementary particles are so much more
intricate in organisms that the activities of organisms cannot
be predicted from our formulation of what occurs in inor-
ganic systems. This idea applies in other fields : If we have
never seen more than two or three people together, we are
not likely to be able to predict how a great crowd will be-
have. The mechanist passing to the study of living crea-
tures is like the student of inorganic chemistry who is sud-
denly confronted by the carbon compounds; he is assured
that he is still at the same science, but he finds this difficult
to believe, the data are so different. This is a vitalistic
view in so far as it recognises the apartness of living creatures
from things in general, but it does not admit that the problem
of the Amoeba on the hunt is more than a very difficult
problem in dynamics. It does not admit that new concepts

148) THE UNIQUENESS OF LIFE

are required for the description of the activities of living
creatures. The biologist may be allowed a laboratory to
himself as a matter of convenience and courtesy, just as
there is a laboratory for Electrodynamics quite apart from
another for Hydrodynamics. But the idea of biology being
an autonomous science must be nipped in the bud.

It is interesting to notice that many physicists, who are
familiar with the capabilities of mechanical formulation,
have been very cautious in their statements regarding the
extension of this to vital phenomena. Gauss, Cauchy, and
Kelvin may be mentioned as investigators of the first rank
in mathematics and physics who regarded life as belonging
to an entirely different field. Hertz again was very careful:
" We can neither maintain that the internal phenomena of
animated beings obey the same laws (as in inanimate na-
ture) nor that they follow other laws. . . . Our principle,
sufficient perhaps to describe the motion of lifeless matter,
appears at least prima facie to be too simple and limited to
describe the manifoldness of even the lowest vital phe-

nomena.'

Lord Kelvin's view was more dogmatic, and assertive
rather than reasoned. Yet it is important, for surely he, of
all men, must have known how far his physics would carry
him. " The only contribution of dynamics to theoretical
biology is absolute negation of automatic commencement
or automatic maintenance of life. . . . The opening of
a bud, the growth of a leaf, the astonishing development
of beauty in a flower, involve physical operations which
completed chemical science would leave as far beyond our
comprehension as the differences between lead and iron,
between water and carbonic acid, between gravitation and
magnetism, are at present. A tree contains more mystery

THE UNIQUENESS OF LIFE 149

of creative power than the sun, from which all its mechani-
cal energy is borrowed. An earth without life, a sun, and
countless stars contain less wonder than that grain of mignon-
ette. 7 '

With the first grade of vitalism that the problem of the
homing of the bird is only a very complicated form of the
problem of the return of the boomerang we cannot be sat-
isfied. And a sufficient reason for dissatisfaction though
not the only one is to be found in the fact that it has not
yet been found possible to give a mechanistic answer to
any biological question. We know a great deal about the
structure of muscle, the chemical, thermal, and electrical
changes that go on in muscle, but we cannot give a chemico-
physical account of the contraction of a muscle. If i expla-
nation by analysis ' had begun to be successful, we might
hesitate before resorting to ( explanation by synthesis ',
as we do, for instance, when we say that the bird comes
home because it is a creature in whose present the enregis-
tered past counts.

4. Have Organisms a Monopoly of Some Peculiar Energy

or Energies?

According to the second grade of vitalism, there is a
peculiar kind of energy operative in living creatures and
nowhere else. Organisms have a monopoly of some power
in the same (perceptual) series, as, say, electricity. This
is a continuation of one form of the old hypothesis of
* Vital Force ', and it has not found many supporters in
recent years. But it is an honest theory, and may be illus-
trated by a reference to the work of a thoughtful biologist,
Prof. M. Hartog of Cork. Every one admits that one of
the commonest phenomena of life is also one of the most stag-

150 THE UNIQUENESS OF LIFE

gering, namely, cell-division. After extraordinarily intricate
and uniform internal movements of particles a cell divides
with meticulous accuracy into two precisely similar halves,
sometimes, strange to say, into .two quite dissimilar halves.
As we have already remarked, it is one of the wonders of
the world. Like not a few others, Professor Hartog has been
studying the dividing cell for many years, and he believes
that he has discovered a new force operative in the process.
He is quite clear that well-known physical forces are at play
in the dividing cell, such as mechanical tensions, surface
tensions, and osmotic actions; he is also clear that agencies
are at work which occur elsewhere in living organisms, but
whose physical interpretation is uncertain, such as protoplas-
mic streaming; yet when he has made allowance for all
these he finds evidence of the working of a new force which
he calls " mitokinetism ". He does not know the proximate
cause of this force or its relation to other forces, he knows
it by its works, and he cannot identify it with any other
force, electrostatic for instance. Nor does he base his own
vitalistic belief on his " mitokinetism ". We have here the
basis of a theory that organisms have a monopoly of some
peculiar energy or energies, and are therefore apart both
from machines and from not-living things in general.

A clear statement of this position was given by the late
Prof. Eichard Assheton, who suggested that instead of being
satisfied with the more or less mystical Entelechy we should
look out for some form of energy peculiar to living matter.
In 1894, Koux observed that if the cleavage-cells of the ovum
of the frog (Rana fusca) towards the end of segmentation
be isolated and floated in a suitable medium, they show
mutual attraction. The sides of one cell become drawn out
towards a neighbouring cell ; the cells move towards one

THE UNIQUENESS OF LIFE 151

another and touch; they actually become pressed and flat-
tened up against one another. This interesting attraction
was called by Eoux cytotropism or cytotaxis, and it has been
observed in other cases. Assheton was particularly concerned
with the development of the lancelet or Amphioxus, where
the ovum divides into a hollow ball of cells, which again is
indimpled or invaginated to form a two-layered sac of cells,
the gastrula. Assheton sought to show that, if there were
an attractive force between cell and cell, acting from centres
represented by the nuclei of the cells, the hollow ball of cells
would at a certain stage become invaginated. The explana-
tion of how gastrulation might come about was put forward
as indirect evidence in favour of the existence of some force
acting from a centre like gravitation or magnetism or statical
electricity, but probably of a different nature and with dif-
ferent laws, and an attribute of living matter alone. Asshe-
ton meant definitely a kind of physical energy " which could
be investigated by the ordinary methods of mensuration and
computation available to the mathematician ".

Herbst made the remarkable observation that if the ova
of the sea-urchin be allowed to develop in sea water deprived
of its calcium salts, the blastomeres separate from one an-
other, instead of adhering. What looks like repulsion be-
tween two centres is seen in the normal process of cell-
division, where the incipient daughter-nuclei, while still parts
of the parent cell, seem to repel one another, and yet imme-
diately after separation appear to attract one another strongly.
Assheton suggested that the hypothetical form of energy ex-
hibits an unceasing recurrence of a bipolar state out of a
unipolar state. "The attraction and repulsion observed be-
tween cell and cell are certain of the manifestations of this
supposed form of energy but probably not by any means

152 THE UNIQUENESS OF LIFE

all; just as attraction and repulsion are manifestations of
electrical energy under certain conditions, but are not by
any means the only manifestations." Dr. Assheton went
on to suggest that in nerve impulses we may experience
" manifestations in another way of the same form of energy
which under other conditions produces the attractions and
repulsions and the figures of strain in the dividing cells,
and the actual cell division ". " Driesch's Entelechy," he
concludes, " although not supplying the essential qualities of
a driving force, may perhaps be a complex system of a sim-
pler vitalistic force with other forces which has within cer-
tain limits a balancing or compensatory influence upon the
course of development like that which a gyroscope has in
compensating (within certain limits) for disturbances to
the course of a monorail vehicle ' (p. 76).

The disadvantages of this position are the following:
first, it is difficult to prove the independence of the alleged
new force or energy; second, to attach much theoretical im-
portance to it reminds us warningly of the old mistake of
making much of organic compounds, which it was alleged,
could . not be formed without the aid of the ' vital force '
resident in organism ; third, the inadequacy of the physico-
chemical formulae to describe animal behaviour or the like,
does not appear to be of a kind which would be affected by
the discovery of a new form of physical energy either within
or without the organism. Yet the theory that there may be
a special kind of power or energy operative in living crea-
tures is on the lines of sound science, and must be impartial-
ly tested by biologists. There seems nothing very unlikely
in the idea that living matter may be able to effect an or-
ganisation of movement in some way which we do not under-
stand. The theory has nothing to do with Ostwald's sug-

THE UNIQUENESS OF LIFE 153

gestion that the chemical energy of protoplasm may be trans-
formed into the mental energy of thinking, which seems to
us a contradiction in terms.

It is stated that the movements of molecules in the domain
of the inorganic obey the law of probability ; it is interesting
to ask whether that is true of the molecules within organisms

o

(see Soddy, Matter and Energy, p. 101). But we cannot"
suggest a test case ! Is it conceivable that, just as lowering
the temperature of a gas makes it into a liquid whose mole-
cules below the surface have movements quite different from
what they had in the gas state, so complicated molecules
in a colloid state have movements which obey some other
law than that of probability, and is it conceivable that the
reality of which the molecular movements are one expres-
sion then begins to show another aspect, perhaps, as some
would say, a metakinetic aspect ?

5. Is there a Non-perceptual Vital Agency resident in Or-
ganisms and operative in Distinctively Vital Activities?

The third view is thoroughgoing vitalism, best represented
by Driesch, whose ingenuity and consistency command our
admiration. Its postulate is a non-perceptual vital agency,
which does not occur in not-living things but is confined to
organisms, where it operates in certain cases, directing the
chemico-physical processes so that their results are different
from what they would have been apart from its interven-
tion. Three points should be carefully noted: (1) that the
postulated vital agency or entelechy is not the outcome of
more complex physical conditions, " not a new elemental con-
sequence of some constellation " ; (2) that it only inter-
venes at certain steps, introducing an occasional indetermin-
ism; and (3) that it is supposed to be a genuine agent, count-

154 THE UNIQUENESS OF LIFE

ing for something, " at work " as Driesch says. On this view,
obviously, there is a deep-lying distinction between the flight
of a bird and the movement of a comet, and Biology is by
hypothesis autonomous. A general statement of this third
position, apart from Driesch's particular formulation, has
been given by Ritter (1911, p. 437). After stating that
materialism is the belief that all vital phenomena can be
completely explained in terms of the material elements that
go to make up the organism, he defines vitalism as " the
belief that organic phenomena cannot be fully explained by
referring them to the material elements of which organisms
are composed, but that something not really belonging to
the natural order, either explicit or implicit, is present in
living things. The essence of the conception, whatever be its
variety or form of statement, is that something absolutely
new and novel came into the world when living beings
came and that this came as a special force, or principle, or
factor anything you have in mind to call it, so long as
it is not material. A further essential to the conception is
that this new thing is elemental, protean, once-for-all. It
is not exactly the life itself of the organism. It is rather
the informing, underpinning, ultimate motor, of life."

The general nature of the argument that Driesch uses to
support his conception of Entelechy may be briefly indi-
cated. He takes in particular the facts of morphogenesis-
the development of the embryo or the regeneration of a lost
part. If what takes place is determined solely by physical
factors there must be something in the nature of a very
complex machine in the egg or at the cut end of the hydroid
branch from which a new polyp grows. He allows the
imagination to erect this machine with all conceivable
intricacy and device, and then proceeds remorselessly to

THE UNIQUENESS OF LIFE 155

bring forward fact after fact which contradicts the possi-
bility of such a machine accounting for the result observed.
Thus by an argument by exclusion he seeks to prove that
the development must be determined by a non-spatial, non-
perceptual agent or Entelechy.

(a) One of the objections to thoroughgoing vitalism is
that it implies a definite breach in the fundamental law
of the conservation of energy. If a non-perceptual agency
occasionally directs the chemico-physical operations of the
body, there must be some exertion of power which does not
figure in the chemical and physical accounts. The calo-
rimeter experiments seem to show that for a man in a closed
system the expenditure is equal to the income over a term
of days. There is no gap for the intervention of a physical
agency; no, not for a moment. This is a serious objection,
yet apt to pierce the hand of those who rely on it. For it
is a rash procedure to use a physical generalisation as a
dogma in the realm of organisms. It is begging the question.
Boyle's Law did duty for a couple of centuries before physi-
cists discovered that it is accurate only between certain limits.
The Law of Gravitation does not hold below certain sizes and
distances. Perhaps the Law of the Conservation of Energy
does not quite hold for living creatures. The calorimeter ex-
periments are not so absolutely exact that it can be asserted
that the balance at the end of the day is precisely what it
should have been if the organism were a mechanism and noth-
ing more, and that therefore an Entelechy does not exist.
One remembers that a very minute expenditure of energy
may effect a great deal, just as cutting a tape or pressing
a button launches a vessel. Driesch's Entelechy is supposed
to act by inhibiting for a time the transformation of one kind
of energy into another.

156 THE UNIQUENESS OF LIFE

In a case of this sort it is the opinion of expert physicists
that is most valued, and in discussing the analogous case
of the operation of our will, the late Prof. J. H. Poyn-
ting, an authority of eminence, suggested that a merely
deflecting force does no work though it changes configura-
tion. The will may introduce a constraint which guides
molecules to glide past one another instead of clashing a
slight change of spin which may be compensated for by a
slight opposite spin put on the rest of the body. " The will
may act as a guiding power changing the direction of the
atoms and molecules in the brain, and we can imagine such
a guiding power without having to modify our ideas of
the constancy of matter or the constancy of motion or even
the constancy of energy' (Poynting, 1903, p. 745).

(6) A recurrent argument in Driesch's exposition of his
doctrine of vitalism is that no machine-like agency can possi-
bly account for the facts of development, inheritance, and be-
haviour. A machine is defined as " a given specific combina-
tion of specific chemical and physical agents ", and Driesch
seeks to reduce to absurdity the theory that any machine could
do what is required. His argument is very convincing, but
of course we can argue only about machines that we know,
and imaginative combinations or improvements of these, so
it seems open to the critic to reply that no one knows all possi-
ble machines, and to urge that proving the untenability of a
machine-theory does not prove the necessity of postulating
an Entelechy.

Concerning the ingenious machines almost super-
machines invented by man, it may not be needless to re-
mind ourselves that their introduction into the argument
is apt to be fallacious. For they, like the wonderful achieve-
ments of the synthetic chemists, are the fruits of intelligence,

THE UNIQUENESS OF LIFE 157

not fair samples of the inorganic world. An ingenious
machine, like a type-writing or a calculating machine, is
an elaborated tool, an extended hand, and has inside of it, so
to speak, a human thought. It is because of these qualities
that it is a little like an organism. Practically, however,
most of those who have an intimate acquaintance with living
creatures will agree with Driesch in the negative part of
his position that their behaviour is not very like the work-
ing of machines. For certain purposes it is not amiss to
think of the organism as an engine, but it is a self-stoking,
self-repairing, self -preservative, self-adjusting, self-increas-
ing, self- reproducing engine !

(c) Dr. J. S. Haldane states another objection. " In order
to ' guide ' effectually the excessively complex physical and
chemical phenomena occurring in living material, and at
many different parts of a complex organism, the vital prin-
ciple would apparently require to possess a superhuman
knowledge of these processes. Yet the vital principle is
assumed to act unconsciously. The very nature of the vital-
istic assumption is thus totally unintelligible." Because we
do not understand vital phenomena in terms of mechanism,
we postulate an Entelechy, only to discover that we have no
idea how the Entelechy can know what to do. We believe
that a dog's appreciation of the meaning of certain circum-
stances is real and an effective factor in its ensuing be-
haviour, and there are various ways of thinking of the dog's
intelligent behaviour so that it does not appear magical or
miraculous, but we find it difficult to think of the Entelechy's
appreciation of an intricate chemical situation within the
body. Even if we suppose a hierarchy of psychoids with
division of labour, acting like the various men about a rail-
way station, some of whom put people into the proper trains,

158 THE UNIQUENESS OF LIFE

while others put them into the proper compartments, others
shut the doors and give the signals, and others work the
points, the correlation of the whole by the chief Entelechy
is just the problem we started with.

To many it appears that to assume the existence of an
Entelechy does not help in the least. " It seems to be merely
a way of collecting all the difficulties together and giving the
bundle a name." Professor Jennings asks persistently how
the Entelechy gets its power of co-ordinating and harmonis-
ing. " To accept the Entelechy unanalysed and unexplained
is merely to give up the problem as insoluble." And if
we try to work out a comparative development of Entele-
chies, " then surely we are merely transferring our problem
from the complex that we actually find in time and space
to a sort of manufactured copy of this problem, presenting
the same difficulties, with the additional one that it is
impalpable and cannot be directly dealt with at all. The
Entelechy simply adds to our difficulties."

We confess to some sympathy with those who ask why
there should be all this straining and striving to remove
organisms from the domain which includes the stars and
precious stones, Northern Lights and dew-drops. For the
world that we parcel out is probably one after all, and in
any case there is no stigma in being mechanical. With this
sympathy we would quote from a colleague : " I am neither
afraid nor ashamed to uphold (to the great length that I
have gone) a mechanical theory of the organism and its
activities, or rather of its reactions with the outer world. I
do not admit that in doing so we degrade our conceptions,
or belittle our notions, of the organism. The mechanical
concept is no base one at all. The earth itself and the sea,
the earth with her slowly changing face, and the sea multi-

THE UNIQUENESS OF LIFE 159

tudinous with all its tides and currents and great and little
waves, constitute a mechanism ; the heavens themselves, the
sun and moon and all the little stars, are a glorious mecha-
nism. The whole material aspect of the universe is a mecha-
nism ; we know not how it has its being, but we know that it
lives and moves obedient to everlasting laws; and the same
Benedicite Dominum is addressed to the Showers and Dew
and to the Winds of God as to all that move in the waters
and all that move in the air, and to all the Beasts and Cattle,
and unto the Children of Men ' (D'Arcy Thompson, Life
and Finite Individuality, p. 52).

This is admirably said, yet we do not think that the
category of ( mechanism ' exhausts the reality of the earth
and the heavens, still less that of the flower in the crannied
wall. It is mainly a matter of method : Are mechanical
categories sufficient in biology or must we have biological
categories as well ? For practical purposes, moreover, the
theory of organism transcending mechanism is to be recom-
mended. It has pragmatic sanction.

6. Descriptive or Methodological Vitalism: the

' Biological J View.

Looking backwards, we cannot accept the view that the
study of animal behaviour is just the study of very intricate
and at present insoluble problems in chemistry and physics;
we cannot accept the view that organisms exhibit a new kind
of physical energy or several of them ; and we cannot accept
the thoroughgoing vitalistic theory of an Entelechy. What,
then, is our position ?

We wish primarily and scientifically to stand for what
may be called ( descriptive ' or l methodological ' vitalism.
Unable to attain any discernment of the essence of the differ-

160 THE UNIQUENESS OF LIFE

ence between organisms and things in general, we hold to
what we believe to be a fact, that mechanical formulae do
not begin to answer the distinctively biological questions.
We do not doubt the value of bio-chemistry and bio-physics,
but when these are added up the summation is not biology.
We need new concepts such as that of the organism as a
historic being which has traded with time, and has en-
registered within itself past experiences and experiments,
and which has ever its conative bow bent towards the future.
We need these new concepts because there are new facts
to describe, which we cannot analyse away into so-called
simpler processes. In the present state of knowledge we
cannot tell in what the newness essentially consists. This
appears to us to be a quite legitimate stopping-place, without
going on (except speculatively) to any positive vitalistic
theory which must be, from the nature of the case, meta-
physical.

The best statement that we know of methodological vital -
is that given by Mr. E. S. Russell, and we take one of
his illustrations the migration of the European eel to its
spawning ground in the deep, warm, and salt waters on the
verge of the abyssal Atlantic. Chemical and physical meth-
ods can tell us much how the eel gets energy for its long
journey, and a score of other things ; they might conceivably
give us an account of every transformation of energy within
the eel from the time it left the pond to the time of its death
in the dark abysses, but they do not illumine the biological
fact of the eel's migration. As Mr. Russell says, " The
migration is, so to speak, a fact of a higher order than any
physical or chemical fact, although it is made up of an in-
definitely large number of physical and chemical facts. To
explain the fact one must accept it as a whole, not seek

THE UNIQUENESS OF LIFE 161

to conquer by dividing it, for if one analyses it into its
components one inevitably misses the bond of union. . . .
The explanation of a biological fact cannot be obtained by
decomposing it, any more than the properties of a chemical
compound can be deduced from the properties of its consti-
tuent elements. ... A biological fact is something more
than a mere arbitrary assemblage of component physical and
chemical facts, and the component facts may be explained
without touching at all the problem of their composition.
In the case of the eel it is possible to decompose the act of
migration into a large number of acts of a different order,
into the chemical reactions occurring in muscular move-
ment, in nervous conduction, in the stimulation of peripheral
sense organs, but by doing so one cannot but lose sight of the
interconnection of these single acts, the interconnection which
really binds together all these acts into the single act of
migration. ... To decompose the act of migration
into an infinity of physico-chemical processes is to take an
infinity of little partial views of the act, but what one needs
for an explanation of the fact is a comprehensive view which
will unite all the relevant features of it into one picture. To
the chemist confronted with the problem there is no fact
of migration at all, there is only an intricate enravelment
of chemical reactions ; to the biologist the fact of migration
to a particular region for a particular purpose is cardinal,
and the chemical processes involved in the action are neg-
ligible."

But, it may be said, if the mechanistic description leaves
the eel's migration obscure, does any other description fare
better? The answer is that we must look at the migration
in the light of what we know of organisms in general. It
is certain, for instance, that what a living creature does

162 THE UNIQUENESS OF LIFE

is in part determined by the past its own experience and
the history of its race. In the organism, as Bergson says,
the past is prolonged into the present. " Living things
therefore require an historical explanation. Non-living
things, on the contrary, have no history in the biological
sense of the word, and no inorganic thing carries its past
about with it' (Russell, 1911, p. 338). We have to pass,
therefore, to a new level of explanation, and whenever we
mention that the eel is one of a deep-sea race which has
adventurously taken to colonising the fresh waters just as
the salmon is one of a fresh-water race which has taken to
exploiting the resources of the sea, and notice further that
many animals return to their birth-place to breed, and that
some go back to their birth-place to die, a biological light
begins to be shed on the eel's strange story. And we have
but begun. Of course if the objector is prepared to main-
tain that the enregistering of experience by organisms is
nothing more than a special case of the peculiar way in which
colloids are influenced by their history, we can only say that
this theory must get more facts to back it before we can take
it very seriously.

No one wishes to slacken investigation into the physiology
of migration a most fascinating and suggestive inquiry.
It is known that when eels become mature there is an altera-
tion in the metabolism, and that the altered metabolism af-
fects the carbon dioxide content of the blood, that this in-
creases irritability, and that this increases range and vigour
of movements, and, moreover, that changes in the metabolism
of the animal affect its reactions to chemicals in the water,
to gravity, and to currents. Much knowledge of this kind is
accumulating, but it seems to many that it does not grip the
problem unless it be taken along with the concept of the

THE UNIQUENESS OF LIFE 163

organismal enregistration of past experiences, individual and
racial. We must bear in mind that organismal reactions are
often very precise the North Sea will not suit the eel, it
must move on; that they are often extraordinarily insistent,
as we may infer from Maitland's experiments on Smolts
which were always jumping out of the pond at the time when
they should naturally have been leaving fresh water ; that
the internal adjustments are so delicate that they begin to
operate long before the situation is at all critical ; and that,
after all, what we see is an active searching out of regions or
conditions of optimum stimulation.

7. Speculative.

Such, then, is the position which may be called descriptive
or methodological vitalism. If we are pressed to go beyond
Science in the endeavour to form some connected reconstruc-
tion, we should say that those constellations of ' matter '
and i energy ' which we call organisms afford opportunity
for the expression of aspects of reality which are undetect-
able in the inorganic doman. ' Matter ' and i energy ' are
scientific concepts defined for the description of the so-
called physical universe; they are defined by certain meth-
ods the intellectual instruments of physics and chemistry;
they are admittedly reached by processes of abstraction. In
dealing with the outer world apart from life, these formulae
work well, but we find no warrant for asserting that they
exhaust the reality of Nature. They correspond to reality,
for we risk our lives on this correspondence, but it does not
follow that they are exhaustive. Reality is richer than they.
For just as a physician may on occasions treat his patient
successfully without recognising him as a rational being at
all, yet will on other occasions fail grievously through not

164 THE UNIQUENESS OF LIFE

doing so, so it is possible that an aspect of reality which may
be safely neglected, being latent or hidden, in one constella-
tion of matter and energy, may be patent and dominant in
another. Instead of supposing the intervention of vital
impetus or Entelechies as bolts from the blue which enter
organisms, may we not conclude that the qualities which
render the postulation of vital impetus and Entelechy neces-
sary to some minds have been in kind present throughout.
We say " in kind ", since most naturalists agree in believing
that we share in a movement which is not the unwinding
of something originally given, but an evolution in which
time counts.

Our argument for the autonomy of biology may be ex-
pressed in general form by saying that it recognises the
correlation rather than the unity of the science of Nature.
We find it technically stated by Prof. Arthur O. Lovejoy:
" Scientific unification takes place in so far as diverse classes
of phenomena come to be recognised as deducible from a
single, relatively simple generalisation concerning the cor-
relation of certain variables provided that in each partic-
ular case the actual natures or values of the variables be
known. And unification fails of attainment in so far as
two or more kinds of phenomena appear (in the light of
existing knowledge) as undeducible from any single, already
verified law, even were the actual values of the variables
referred to by any such law precisely ascertained for the
phenomena in question. When two or more comparatively
specific laws are, in the latter sense, incapable of being
deduced from any common, more general, law in other
words, are not thus far unified- -we may speak of the laws
as being discontinuous with one another 7 (1912, p. 17).
He goes on to say that while discontinuity emerges if the

THE UNIQUENESS OF LIFE 165

behaviour of an animal is shown to be not deducible from the
laws of thermodynamics, though in conformity with them,
a greater discontinuity will appear if it should be shown
that in some cases (distinctively vital processes) the motion
of particles in an organism, say an Amoeba, neither follows
from nor conforms to the motion of particles in an inorganic
system, such as, let us say, a whirlpool.

It may be justly said that if Biology requires categories
of its own, it should be able to give some indication of what
they are. They may not be clear as yet, the science is so
young, but they should be emerging. And surely some of
them are beginning to be discerned. First, there is the fact
of organic retention, the capacity of enregistering experience,
garnering the past, capitalising gains. We see this in the
results of training and habituation, in the establishment of
organic rhythms or periodicities, in the organisation of steps
which have proved adaptive, in the organic inertia which
the hereditary relation reveals. Second, there is the self-
maintaining, self-preserving, and purposiveness of the organ-
ism. Life has been defined as " effective response ", but it is
more; it is effective prospectively as well as immediately,
it is effective not only in external action,, but in self-preser-
vation. We see in the developing organism a remarkable
6 conativeness ? , especially when what is artificially disar-
ranged is put to rights again. We see in the simplest be-
haviour, where the meaning of things counts, an element of
pre-awareness that is essentially teleological. Third, there is
the fact of variability, the capacity and habit of giving origin
to the new.

166 THE UNIQUENESS OF LIFE

8. Retrospect.

How does the ' biological ' position differ from the theories
already illustrated? The first theory was that the activity
of living creatures stands apart from that of not-living things
only in being very much more complex. The ' biological '
view recognises that many describable chemical and physi-
cal processes occur in the living body; and admits that many
more such processes and much more complicated ones
will be eventually sifted out, but insists that even if the
ledger of all the chemical and physical transactions were
complete, it would not furnish an account of the creature's
life from day to day, nor of its behaviour, nor of its individ-
ual development, nor of its racial evolution; and why not?
Because the concepts of chemistry and physics fail to grip.
This is what one of the acutest and best-informed of modern
methodologists, Professor Enriques, means by saying:
" The mechanical hypothesis does not appear to be incom-
patible with the phenomena of life, but it is unimportant
for the study of these phenomena' (1914, p. 385). And
again he speaks of " the irrelevancy of the mechanical ex-
planation in biology' (1914, p. 384). And why do the
chemico-physical formula? fail to grip the essential features
of the activity we call living ? Not because the processes in-
volved are too difficult or too complex but because they
demand a different order of scientific explanation.

The second theory was that living creatures have exclu-
sive possession of a peculiar form of energy in a line with
the other forms of energy, like heat and electricity, and
not in any way mystical, but amenable to experimental
and mathematical treatment. The ' biological ' position dif-
fers from this in refraining (in the meantime) from any

THE UNIQUENESS OF LIFE 167

hypothesis as to the nature of the difference between stone
and tree, between boomerang and homing bird, in being
content with holding to the fact that new aspects of reality
have somehow risen to the surface and demand other than
mechanical formulation. Learning, choosing, struggling, and
the like appear to transcend mechanism.

The third theory asserts that something not really belong-
ing to the natural order, something not material, is present
in living creatures, informing them, underpinning them,
inspiring them. The ' biological 5 view differs from this in
keeping to the idea of continuity, in supposing that aspects
of reality which in azoic days were only implicit became
explicit in the first living creatures, and have become more
and more patent as evolution has gone on.

We are here in the difficult position of agreeing on the
one hand with the positive vitalists in their emphasis on
the uniqueness of organisms as compared with not-living
things, and yet of disagreeing with them (or many of
them) in their emphasis on discontinuity. It is plain from
our argument that our understanding of the facts of the
case leads us to a high appreciation of the apartness of
organisms and to a conviction that living transcends all
mechanical description, but we are not compelled by this
to a rejection of the central idea of Evolution, which is
continuity.

To ignore distinctions yields false simplicity; to exag-
gerate them yields false complexity. There is very little
individuality in the inorganic domain, but it must be re-
membered that gold and iron, phosphorus and sulphur,
oxygen and nitrogen remain quite distinct things with prop-
erties and ways of their own, specific like organisms, " each
something of a law unto itself ". There are, indeed, logical

168 THE UNIQUENESS OF LIFE

relationships between the elements as members of a system,
and the radio-active elements are known to be transmuting
themselves, but these facts also bear out our point that there
is more analogy between the inorganic and the organic than
at first appears. And just as the breeder and cultivator help
to make new animals and plants, so the synthetic chemist
makes camphor and sugar, rubber and alizarin, and the
physicist as engineer makes the cleverest machines which
borrow some of his own individuality. The breeder works
mainly by analysis, the chemist by synthesis, but both are
creative. We agree with those thinkers, like Lloyd Morgan,
who have tried to link on the synthetic tendency which
they detect in the formation of crystals and the building
up of carbon compounds to the synthetic tendency which
they see in organic development. Lloyd Morgan refers to
the teaching of Nernst that, while a large number of physical
properties are clearly additive, there are other properties
which are non-additive, and should be called constitutive.
" The kind of influence of the atom in a compound is pri-
marily dependent upon the mode of its union, that is,
upon the constitution and configuration of the compound '
(Nernst, Theoretical Chemistry. Translated by Lehfeldt.
Quoted in The New Realism, New York, 1912, p. 238).

Instead, then, of seeking to interpolate a new agency-
non-material and not perceptual- -we express the fact that
living is not explicable in terms of matter and motion by
saying that all organisms known to our senses as colloca-
tions of protoplasm reveal new aspects of reality, tran-
scending mechanical formulation. That these new aspects of
reality are analogous to those which are exhibited by the
higher organisms namely, intelligence and personality
may by and by appea v r, for our central idea is that the

THE UNIQUENESS OF LIFE 169

organism is a psycho-physical individuality. That they
probably have their infra-conscious and implicit analogues
in the domain of the inorganic is our metaphysical hypothe-
sis, which is but little different from the Aristotelian dictum
that there is nothing in the end which was not also in kind
in the beginning; but little different from the doctrine that
in the beginning was Mind.

9. Why Cannot the Controversy between Mechanistic
and Vitalistic Theory be Ended?

The persistence of the controversy between mechanism
and vitalism has often been the subject of remark. Aristotle
was a vitalist and his biology was in conscious opposition
to the dogmatic mechanism of the school of Democritus.
Yet we are facing the same antithesis to-day. Whence this
terrible longevity ?

Part of the answer is probably to be found in the intrinsic
difficulty of the problem of vital activity, which seems to
be midway between mechanical uniformity and our own con-
scious purposing. The secret of life is baffling, receding
as we approach. Perhaps when it seems almost within the
physiologist's reach, it is farthest away. Perhaps, as Berg-
son says, our intelligence is not suited for this quest, and
we get nearest life in sympathy.

But apart from the unanswered question: What is the
essential difference between the Amoeba and the crystal,
between the bird and the boomerang, is there not something
strange in the historical oscillations of opinion between
mechanistic and vitalistic interpretation of the living or-
ganism ? Now it is a machine and again it is a spirit,
now an automaton and again a free agent, now an engine
again an entelecby? Why does, the pendulum of rejlec?

170 THE UNIQUENESS OF LIFE

tion swing so? It is partly because new knowledge always
rewards the prosecution of chemico-physical analysis, and
the investigators, flushed with success, insist on premature
generalisation. It is partly because vitalism is apt to be-
come vague and mystical, provoking a positivist recoil which
is, within its limits, quite wholesome.

According to Prof. W. E. Hitter, vitalism is the lineal de-
scendant of early animism, sharing with it the assumption of
non-material, essentially extra-corporeal forces or principles
to explain observed phenomena. Similarly, materialism is
the lineal descendant of early magic, sharing with it the as-
sumption of crediting observed bodies with qualities which
are not verifiable. " Both attempt to explain everything in
terms of ' something else ', and this in essence amounts to a
denial of the reality of the organic beings which we actually
see and deal with' 7 (Hitter, 1911, p. 441).

SUMMARY.

It is plain that at present chemical and physical formulations do
not suffice to answer biological questions, do not adequately cover
what is distinctive in the functions, behaviour, development, and
evolution of living creatures. But this does not in itself prove the
validity of any of the various forms of positive vitalism. These
must be considered on their merits.

(a) Some have maintained that mechanistic formulation is not
exhaustive even within the domain of the inorganic. If so it will
be a fortiori inadequate in the realm of organisms, (b) Others,
while admitting that we cannot now translate vital processes into
terms of any known chemistry and physics, suggest that we may
be able to do so eventually. The concepts of chemistry and physics
may have to be modified. But we can only discuss the sciences as
we know them now. (c) Others, again, maintain that it is mind
that makes all the difference. But the problem " Vitalism or
Mechanism?" is the same for plants as for animals, and we do not
know anything about the mind of plants.

It may be said that there are three grades of vitalism. (1) The

THE UNIQUENESS OF LIFE 171

first finds the differentia of organisms in the greater complexity
of their configurations or collocations of elementary particles.
Living creatures are apart, but they do not require new concepts
(an autonomous science) for their description. They only require
separate laboratories fcr their study. (2) The second vitalistic
theoery holds that organisms have a monopoly of some peculiar phys-
ical energy or energies in a line with, say, electricity. (3) The
third theory the only thoroughgoing vitalism postulates a non-
perceptual vital agency, associated with organisms, operating
actively in certain cases, directing the chemico-physical processes,
so that their results are different from what they would have been
apart from intervention. The finest expression of this view is
Driesch's doctrine of Entelechy, the advantages and difficulties of
which must be carefully considered.

Perhaps it is safer to be content with a descriptive or method-
ological vitalism that is, with maintaining that in describing organ-
isms we require ultra-mechanical concepts. But if the word vitalism
is taken to imply dualism and intervention, we may call our posi-
tion simply biological or organismal. The central idea is that of
the organism as a psycho-physical individuality which has enreg-
istered within itself the gains of experience and experiment, and
has ever its conative bow bent towards the future. Instead of
trying to interpolate a new agency, may we not simply recognise
that organisms reveal certain aspects of reality which are not
apparent in the domain of the inorganic?

LECTURE VI.
ANIMAL BEHAVIOUR

LECTURE VI.
ANIMAL BEHAVIOUR

1. What Is Behaviour? 2. Diverse Views as to Animal Be-
haviour. 3. Activities of Unicellular Organisms. 4. Spe-
cial Case of Shell-building among Arenaceous Foraminifera,
5. Reflex Actions. 6. Tropisms. 7. Non-intelligent
Experimentation, 8. Instinctive Behaviour. 9. Theories
of Instinct. 10. Evidence of Intelligent Behaviour. 11.
Secondary Simplifications of Behaviour. 12. Rational Con-
duct. 13. General Impressions of Animal Behaviour.

IN our preceding studies we reached the conclusion that
a matter-and-motion description of living creatures is far
from being adequate, that it does not grip the kernel. While
organisms are collocations of matter and energy, there has
welled up within them a new aspect of reality which de-
mands other than mechanical, chemical, and physical con-
cepts. Wherein the newness precisely consists we have not
discovered ; but we recognise the living creature as a historic
being which has enregistered the experiences and experi-
ments of the past, which trades to good purpose with time,
which has its conative bow often bent. In the hope of a
further appreciation of the significance of life we turn now
to a more systematic consideration of animal behaviour.

1. What Is Behaviour?

The movements of the planets in their courses afford an
object-lesson of orderliness on a grand scale, and yet the least
in the realm of organisms is greater than they in being
an agent. The movements of a rolling stone are completely

175

176 ANIMAL BEHAVIOUR

determined by its momentum and the circumstances, but
there is a spice of unpredictability in the ways of most
living creatures. The unexpected often happens. There are
indeed uniformities of sequence in the reactions of organisms,
otherwise no science of behaviour were possible, but there
is an undeniable appearance of free agency. It is inter-
esting to watch under the microscope the Brownian move-
ment seen when minute granules of sepia or the like are
jostled hither and thither, probably by the invisible ions
which abut against them, but the scene changes in character
when we put in a vigorous unicellular organism. It does
not ' take charge ' like a gun torn from its attachment on
board ship; it commands its course. Only in the realm of
organisms is there true behaviour in which the creature
is an agent and exhibits a correlated or concatenated series
of acts, effective towards some definite result, favourable to
the continuance and harmony of vital processes.

There are two master-activities in the animal organism
for the sake of which life is worth living movement and
feeling, contractility and irritability, the functions in most
cases of the muscular and nervous systems respectively.
These master-activities are kept agoing, the relevant struc-
tures are kept in working order, by the other everyday func-
tions of nutrition, circulation, respiration, excretion, and so
on ; never forgetting, in connection with Vertebrates at least,
the fundamental trigger-pulling and regulative function of
the organs of internal secretion. These everyday functions
are the pre-conditions of behaviour ; and growth and maturity
may also condition behaviour. But behaviour itself is much
more, it means that the organism is an agent and that it
exhibits a correlated or concatenated series of actions.

ANIMAL BEHAVIOUR 177

2. Diverse Views as to Animal Behaviour.

The difficulty of rightly interpreting the observed be-
haviour of animals is confessedly great. It is not easy for
us to get mentally near them. In many cases the structure
of their body in general and of their nervous system in par-
ticular is very different from ours; their sense-organs are
often on another plan, and there are some whose functions
we do not yet know; such words as a few of the higher
animals have, we can only vaguely understand. How are
we to get into mental contact with ants and bees? And
even for more accessible animals, like horse and dog, there
is a great difficulty involved in the simple fact that all our
psychological terms are saturated with human meaning.

Some investigators have found a short and easy way out
of difficulties by dogmatically declaring that there is no more
mind among animals than there is among plants, and that
the sensible course is to keep to physiological description.
If that suffices for giving an account of the bryony climbing
up the hedge with its exquisitely tactile and adaptively
motile tendrils, will it not serve for the sea-urchin climbing
up the rock, the squirrel climbing up the tree? This is
the extreme of over-simplicity. It was indeed a wise saying
of Spinoza : " No one has yet learned from experience what
the body regarded purely as a body is able to do in accord-
ance with its own natural laws, or what it cannot do ", but
it seems to most naturalists to make the behaviour of higher
animals magical if we do not credit them with an aware-
ness and pre-awareness of meaning.

There are others who think that we get nearer the truth
the more anthropomorphic we are, who believe that the
behaviour of all animals shows evidence of mind. That is

178 ANIMAL BEHAVIOUR

to say, the description that we give of an animal's behaviour,
or of critical corners in it at least, is bound to be inadequate
unless we use psychical terms. This is the other extreme.
It was expressed by Hume when he said : ^ : No truth appears
to be more evident than that beasts are endowed with thought
and reason as well as men." That may be tenable generosity
for horse and dog, but it cannot hold good for starfish and
earthworm.

How are we to avoid the stern over-parsimony of Descartes
on the one hand, and the delicious over-generosity of Mon-
taigne on the other? We must not give a false simplicity
to the facts by reducing the animal to the level of an auto-
matic machine, but we must not read the man into the
beast without critical hesitation. The hive-bees that make
the honeycomb so symmetrically are not automatic machines,
but neither are they little geometricians.

To keep to the via media of good sense must always be
difficult, for the assumption of mind in an animal or of a
psychological aspect in the behaviour of an animal cannot
be demonstrated. There is no litmus paper for mentality.
" Every statement," says Bethe, " that another being pos-
sesses psychic qualities is a conclusion from analogy, not a
certainty ; it is a matter of faith." Our assumption of mind
in our fellow-men rests on the same sort of basis (though
with inter-subjective corroborations) ; it is a necessary hy-
pothesis and one that works. Is not a similar hypothesis
indispensable in regard to animals if we are to understand
them and make the most of them? But animal behaviour
has such a long gamut that each case must be judged on
its own merits. We ask in each case whether we can make
sense of what we see without assuming mental factors,
whether we can adequately describe what we see without

ANIMAL BEHAVIOUR 179

using psychological terms. We inquire into the creature's
power of profiting by experience, as to its pursuance of trial-
and-error methods. The growth of experimental psychology
has furnished many a welcome check to interpretations, show-
ing some to be too simple and others to be too generous.
Some weight will also be attached to the degree in which
the nervous system of the animal in question resembles ours,
or that of some types previously judged to be capable of,
let us say, making an inference.

The sound practical rule is to try to re-describe the ob-
served behaviour in as simple terms as possible without leav-
ing out any essential feature. As Prof. Lloyd Morgan has
put it, " In no case may we interpret an action as the out-
come of the exercise of a higher psychical faculty, if it
can be interpreted as the outcome of the exercise of one
which stands lower in the psychological scale ' (1894, p. 53).
The simplest description is not necessarily the true one, as we
know in human affairs ; but the scientific method is to hold
to it till facts force us to give it up.

3. Activities of Unicellular Organisms.

Many unicellular organisms show restless movements
which may be ranked at the foot of the inclined plane of
behaviour. As long as certain combustible materials within
the organism hold out, and as long as certain external stimuli
continue to act, the creatures continue moving; and we see
them responding to various calls which summon them now
to one side and now to the other. This is like the unworked
ore of behaviour, and not much beyond the level of everyday
internal activities. We may speak of it as general organismal
activity among unicellulars.

But even among the simplest creatures we notice three

180 ANIMAL BEHAVIOUR

facts : (1) The movements of one animalcule are often quite
different from those of another, even in the same medium:
so soon is the note of individuality struck. (2) The restless
roving is not at random, and when food is scarce it is in-
tensified, passing insensibly into ' hunting '. (3) Many of
the simplest animals exhibit quite definite reactions to stim-
uli. They respond by particular movements to changes in
temperature, in illumination, and in the chemical composition
of the medium. As there is no nervous system, but simply
a specific inborn protoplasmic organisation, we may use the
phrase unicellular organic reaction for what is in a far-off
way comparable to the reflex action of a higher animal.

The adherents of the mechanistic school point out that the
Amo3ba is a reservoir of energy which is tapped by various
stimuli such as the freshness of the water, the chemical
composition, the temperature, and the illumination. Its
locomotion represents the natural outflow of the stored en-
ergy, and the direction of its journeying depends on the con-
tinually varying stimuli with which it meets. But when we
really study the Amoeba, as Professor Jennings (1906) has
done, the possibility of any simple description of its doings
disappears. Its general condition has much to do with its
reactions; the direction of movement is not wholly deter-
mined by the position of the stimulus or the part of the body
on which it acts; the moving Amoeba shows in its transient
differentiation a trafficking with time; what it has done is
an important factor in determining what it will do ; the
types of reaction are not stereotyped ; it is not possible to
predict the movements from a knowledge of the direct re-
sults of the external influence. So the life of the Amreba
is not such a simple affair as some would make out. We
require a kind of description different from that which

ANIMAL BEHAVIOUR 181

suffices for the potassium pill rushing about on the surface
of the water.

The Amoeba encounters a hurtful stimulating influence
affecting part of the cell ; it withdraws the stimulated part,
and that is related to the localisation of the influence. But
it proceeds to send forth a finger-like process of its living
matter in a new direction, and the issue of this is determined
by internal conditions. " If the new direction of movement
leads to further stimulation, a new trial is made. Such
trials are repeated till either there is no further stimulation,
or if it is not possible to escape completely, until the stimu-
lation falls on the posterior end, and the animal is retracted
directly from the source of stimulation 7 (Jennings, 1906,
p. 22). The importance of this is great. A direction is
taken because it relieves the Amoeba from hurtful stimula-
tion. There is, Jennings says, " selection from among the
conditions produced by varied movements ". Thus the
behaviour of Amoeba is directly adaptive ; it tends to preserve
the life of the animal and to aid it in carrying on its normal
activities" (p. 23).

" The writer is thoroughly convinced, after long study
of the behaviour of this organism, that if Amoeba were a
large animal, so as to come within the everyday experience
of human beings, its behaviour would at once call forth the
attribution to it of states of pleasure and pain, of hunger,
desire, and the like, on precisely the same basis as we
attribute these things to the dog. This natural recognition
is exactly what Miinsterberg (Grundziige der Psychologie,
Bd. I., 1900) has emphasised as the test of a subject. In
conducting objective investigations we train ourselves to sup-
press this impression, but thorough investigation tends to
restore it stronger than at first' (p. 336).

182 ANIMAL BEHAVIOUR

Miss Washburn (1909, p. 41) has inquired into the nature
of the Amoeba's mind, if haply it has one. There cannot be
more than three or four qualitatively different elements in
its experience; there is no evidence of memory images; it
probably has not more than flashes of consciousness. The
problem of the Amoeba's mind can wait, but it seems to us
clear that when we allow as much as possible to physical
properties (such as we see in the improvement of a violin
in the hands of a master), to the response of chemical bodies
to certain stimuli and no others (such as we see in photogra-
phy), to the purely physiological registration of experience
(such as we know in the improvement of well-exercised
muscles), there is a new aspect of reality appearing in the
behaviour of even an Amoeba.

The slipper-animalcule, Paramecium, abundant in water
with decaying marsh plants in it, is a minute, cigar-shaped,
ciliated Infusorian, just visible to the naked eye as an
elongated whitish particle. Its rudimentary but very effec-
tive behaviour has been much studied, especially by Prof.
H. S. Jennings. One of the commonest episodes is that in
its swimming the Paramecium meets with something in-
jurious in the water, and exhibits what is called the " avoid-
ing reaction ". It reverses the action of its cilia and swims
away from the stimulus ; at a certain distance it moves so
as to swing its anterior end in a circle, testing the water in
different directions; when the sample from a certain direc-
tion no longer contains the obnoxious influence, the Para-
mecium goes ahead again in that direction, and may have
a free course till the next stimulus is experienced. When
the original stimulus is due to some mechanical obstacle,
Paramecium can get no hint from testing the water; it u tries
going ahead in various directions, till it finds one in which

ANIMAL BEHAVIOUR 183

there is no further obstacle to progress. In this direction it
continues. Through systematically testing the surroundings,
by swinging the anterior end in a circle, and through per-
forming the entire reaction repeatedly, the infusorian is
bound in time to find any existing egress from the difficulties
even though it be but a narrow and tortuous passageway '
(Jennings, 1906, p. 49).

The behaviour of Paramecium is very instructive in its
combination of effectiveness and simplicity. It drives itself
forward in a narrow spiral, revolving on its long axis and
swerving a little towards the aboral side such is its
action system ; and most of its behaviour consists of slight
variations on this simple tune. " It constantly feels its way
about, trying in a systematic way all sorts of conditions,
and retiring from those that are harmful. Its behaviour
is in principle much like that of a blind and deaf person,
or one that feels his way about in the dark. It is a con-
tinual process of proving all things and holding to that
which is good' (Jennings, 1906, p. 106).

" The behaviour and reactions of Paramecium consist on
the whole in performing movements which subject the or-
ganism to varied conditions (using this word in the widest
sense), with rejection of certain of these conditions, and
retention of others. It may be characterized briefly as a
selection from among the varied conditions brought about
by varied movements' (Jennings, 1906, p. 108). On the
whole the animalcule rejects or avoids what is injurious and
accepts or seeks what is beneficial, just as higher animals
and men do. The behaviour is adaptive and purposive. In-
deed Jennings goes the length of saying : " In no other group
of organisms does the method of trial and error so completely
dominate behaviour, perhaps, as in the Infusoria."

184 ANIMAL BEHAVIOUR

A fact of great interest has been established by Professor
Jennings, that the behaviour of unicellular organisms is
modifiable by experience. He has experimented, for instance,
with a trumpet-shaped ciliated Infusorian called Stentor
which abounds in marshy pools, attaching itself by the nar-
row end to a water-weed, and surrounding the lower half of
its body with a mucus-like sheath, the so-called tube. A
cloud of carmine particles is introduced into the water-
currents passing to the ciliated mouth of the Stentor. It
bends to the aboral side, twisting on its stalk two or three
times as it bends, and thus often avoids the cloud of particles.
That is answer one. But if the particles continue to come,
the ciliary movement is suddenly reversed and the water is
driven away from the mouth. This may be repeated two
or three times, and is answer two. If the Stentor does not
get rid of the obnoxious stimulation in either of these two
ways, it contracts into its tube and suspends activity, this
being answer three. After half a minute or so it re-expands,
and if the carmine particles still reach it, it contracts again.
It will do this many times, and after each contraction it
stays a little longer in its tube than it did before. Finally,
if no improvement in circumstances rewards its trials, it
breaks its attachment and swims forwards or backwards
away from its tube. And this is answer four. " The stim-
ulus and other external conditions remaining the same, the
organism responds by a series of reactions becoming of more
and more pronounced character, until by on of them it rids
itself of the stimulation' (p. 176). " The same individual
does not always behave in the same way under the same
external conditions, but the behaviour depends upon the
physiological condition of the animal. The reaction to any
given stimulus is modified by the past experience of the ani-

ANIMAL BEHAVIOUR 185

mal, and the modifications are regulatory, not haphazard,
in character. The phenomena are thus similar to those shown
in the ' learning 7 of higher organisms, save that the modifica-
tions depend upon less complex relations and last a shorter
time' (p. 179). Our view of living creatures must make
room for the new fact that behaviour reaches this level among
the unicellulars.

Among unicellulars, then, we see the beginning of explor-
ing and testing, the beginning of actual ' hunting ', and this
is on the main line of advance. We see, also, the enregis-
tration of particular reactions to stimuli, an organisation of
behaviour that is economical and in its rapidity of response
often life-saving. But we see, also, a selection of reactions,
a trying of one after the other till haply one meets the needs
of the case, and this ' trial-and-error ' method is likewise
on the mp.in line of advance.

4. Special Case of Shell-building among Arenaceous

Foraminifera.

In the shell-building of some of the so-called arenaceous
Foraminifera Mr. E. A. Heron- Allen and Mr. A. Earland
have described (1915) what looks like constructive skill in
the use of materials. As every one knows, many unicellular
animals secrete shells of exquisite beauty, the ' organic crys-
tallisation ? of which is as much of an unsolved problem as
the adaptive internal architecture of bones, but in the case
of the arenaceous Foraminifera the building materials are
found ready-made in the environment and are utilised very
effectively to form a casing. The points of special interest
are two,--(l) that a particular kind of material, such as
sponge-spicules, is selected from the surrounding debris, from

186 ANIMAL BEHAVIOUR

amid a multitude of apparent alternatives, and (2) that it
is utilised in a fashion which is interpretable as peculiarly
adaptive. The first point may be illustrated by the case of
Technitella tliompsoni, which covers itself with minute per-
forated Echinoderm platelets; the second point by the case
of Marsipella spiralis, which arranges its encasement of
sponge-spicules in a spiral, doubtless of considerable archi-
tectural value.

5. Reflex Actions.

Among simple multicellular animals we find, as among
the unicellulars, abundant illustrations of exploring, testing,
and hunting. Perhaps we may recognise more staying power,
persistence, and momentum, advantages naturally accruing
from the acquisition of a body.

But the establishment of a nervous system opened the
way to the organisation of reflex actions, which are the out-
come of hereditarily prearranged linkages of nerve-cells and
muscle-cells. These play an important role in behaviour.
The sea-anemone's tentacles close upon their victim ; the
nestling's mouth opens at the touch of the food in its mother's
beak ; the earthworm withdraws into its burrow when it feels
the tremor of a thrush's footstep ; we cough in spite of
ourselves when the crumb of bread is going the wrong way,
and so on. These reflex actions are uniform reactions to
a particular kind of external or internal stimulus ; they are
exhibited by all animals of the same kind in approximately
the same way, though some individuals are quicker than
others; they are independent of individual experience and
do not require control on the part of the central nervous
system; they depend on inborn structural linkages of par-
ticular sensory and particular motor nerve-units or neurons.

ANIMAL BEHAVIOUR 187

In typical and simple cases, a reflex action involves (1) the
receptor of a stimulus the sensory or perceptory nerve-cell
from which impulses pass in to the central nervous system ;
(2) a ' motor ' nerve-cell which connects the central nervous
system with a muscle or a gland; and (3) between these
two a * communicating ', or internuncial, or ' associative '
nerve-cell connecting them within the nervous system. The
receptor neurone has its cell-body outside of the nerve-centre ;
the motor neurone, with its cell-body within the nerve-centre,
sends a nerve-fibre to some peripheral effector organ ; the
associative neurone connects the two others. Thus is formed
a ' reflex arc ', the functional unit of the nervous system. In
most cases the arrangements are more complex and several
i reflex arcs ' become interlinked. But the point is that
reflex actions do not require individual correlation; that is
pre-established. Yet it is important not to think of reflexes
too simply.

Combination of Reflexes in Unified Behaviour. The per-
fection of reflexes is well illustrated in the behaviour of
a sea-urchin, which has no nerve-ganglia. Its test is cov-
ered with mobile spines and snapping blades (pedicellaria?)
which react in definite ways to definite stimuli and have an
astonishing independence. For a single spine or pedicellaria
on an isolated fragment of shell reacts very much as usual.
In the uninjured creature the spines and other structures are
all connected by a nervous network on the surface of the
shell, and they act harmoniously, working into one another's
hands, securing effective defence and locomotion. According
to von Uexkiill the sea-urchin is a " republic of reflexes ".
" The separate reflex arcs are so constituted and so put to-
gether that the simultaneous but independent course of the
reflexes in response to an outer stimulus produces a definite

188 ANIMAL BEHAVIOUR

general action, just as in animals in which a common centre
produces the action." As von Uexkiill puts it, when a dog
runs, the animal moves its legs; when a sea-urchin crawls,
the legs (spines) move the animal.

The astounding fact is the unification of behaviour that
may occur in such a " republic of reflexes ". When a sea-
urchin is placed upside down, a continuation of all the usual
reactions would cause it to move on in an inverted position.
But as von Uexkiill has shown, the unusual physiological
state induces a thoroughgoing change in the behaviour of the
spines, they depart altogether from routine, and work adap-
tively to the needs of the organism as a whole, the animal
being turned right again. This warns us not to think of
reflexes woodenly; and if we need another warning we
may get it in the extraordinarily subtle reflex by which a
flatfish adjusts its coloration to that of the immediate en-
vironment of shingle.

Reflex Responses are Affected ~by the Physiological Con-
dition of the Organism. In stinging animals, such as sea-
anemones and medusae, there are numerous reflex actions
of an adaptive kind, concerned, for instance, with feeding.
But it has been shown by Professor Jennings and others that
the reaction is not simply a question of predetermined struc-
ture and an external stimulus. The answer depends on the
relation of external conditions to internal processes. " We
cannot predict how an animal will react to a given condition
unless we know the state of its internal physiological proc-
esses ' (Jennings, 1906, p. 231). Thus, to take a simple
case, a sea-anemone cheated several times with false food
ceases to exhibit the normal reflex. Many a sea-anemone,
e.g., the large Stoichactis helianthus, will remove food from
the oral disc if it is not hungry. A specimen of Metridium

ANIMAL BEHAVIOUR 189

or Aiptasia will refuse to take bits of filter paper, though
it will still take meat. " After it has thus refused paper,
two or three pieces of meat are given in succession, and
taken readily. Now the bit of paper is placed again on the
disc, and it too is swallowed. Clearly, the uninterrupted
taking of a number of pieces of meat changes the physiologi-
cal condition in some way, preparing the animal for the
taking of any object with which it comes in contact. One
cannot fail to note the parallelism with what occurs in higher
animals under similar conditions '' (Jennings, 1906, p. 226).
We see, then, that in relatively simple creatures, such as
sea-anemones and starfishes, which have no nerve-ganglia,
past stimuli and past reactions are important factors in
determining present behaviour. Thus an elongated sea-
anemone, Aiptasia annulata, which lives in crevices beneath
and between stones, will bend into a new position if it
is touched too often, and if it be molested still further
will release its foothold and move to a new region (p. 206).
In its natural surroundings it often has to cramp its
body into quaint zigzag shapes, and a point of some
interest is that this may become habitual and may per-
sist for some time after the creature is removed to an
unimpeded habitat. This illustrates what is meant by
registration.

In his valuable study of the behaviour of the earthworm,
Prof. H. S. Jennings shows that the response to a stimulus
depends on external factors (such as the intensity and locali-
sation of the stimulus), and on internal factors (such as
the state of the animal at the time, its tendency to move
in a certain way, e.g., head foremost, and the direction in
which it was crawling at the time). But what is particu-
larly interesting is the definite evidence that the behaviour

190 ANIMAL BEHAVIOUR

at a given time depends on past experiences on former ex-
ternal conditions and on former actions.

Succession of Tentative Reflexes. Because of the abun-
dance of reflexes in the simpler animals the impression has
gained ground that behaviour in these lower reaches of life
is very stereotyped. But this impression requires critical
consideration. When a particular reflex action solves a par-
ticular problem at a stroke, there is no more to be done.
But the problem is often more difficult, and what the creature
does is to exhibit varied movements and to select certain
resulting conditions. Even in such predominantly reflex
creatures as sea-urchins, the tube-feet, spines, and pedicel-
larise may in difficult situations continue in varied tentative
movements, as if trying all expedients, and long after the
original stimulation has ceased. The ' righting ? reaction
of an ' inverted ' starfish is singularly varied and flexible.
Professor Preyer repeatedly slipped a short india-rubber tube
over one of the arms of a brittle star, and observed five
different ways in which it was removed, including, it must
be confessed, as one desperate method, the surrender of the
arm itself. As the observer remarked, " If one method does
not help, another is used."

Professor Preyer's experiments on pegging down starfishes
(of course without injuring them) revealed extraordinary flex-
ibility of behaviour and also a shortening of the time required
for escape. The number of useless movements, " superfluous
twistings, feelings about, and forward and backward mo-
tions ", becomes less the oftener the individual has been
placed in such a situation. If this is true (Prof. Jennings
notes), we have in so low an animal as the starfish regulation
through the selection of conditions produced by varied move-
ments passing into a more directly regulatory action; in other

ANIMAL BEHAVIOUR 191

words, what is commonly called in higher animals intelli-
gence ' (Jennings, 1906, p. 241). In many cases we have
to do with l chain reflexes ', one phase leading on to another,
but the fact is that " in most cases the succeeding phase is
not invariably and irrevocably called up by the preceding
one ' (Jennings, p. 251), the present action depending upon
the entire physiological state of the organism, which, again,
is determined by various factors.

i/

One of the clearest results of the modern study of the
behaviour of the lower animals is that the kind of action de-
pends greatly on the physiological state as a whole, which,
again, depends in part on history and experience. That ex-
perience can be enregistered in organisms with the simplest
of nervous systems or with none is certain. Two individual
Planarias (small ciliated fresh-water worms) often react in
opposite ways to the same stimulus. What they do varies
with their appetite, their freshness or fatigue, their recent
stimulation and degree of excitement, and their history.
After long study of Planaria, Professor Pearl concludes that
" it is almost an absolute necessity that a person should be-
come familiar, or perhaps better, intimate, with an organ-
ism, so that he knows it in something the same way that
he knows a person, before he can hope to get even an approxi-
mation of the truth regarding its behaviour' (quoted by
Jennings, 1906, p. 254).

If a reflex be an invariable reaction to a given stimulus,
then there is much more than that in the behaviour of lower
animals. For different answers to the same stimulus may
be given by the same kind of creature or by the same creature
at different times. The answer depends on the organismal
condition as a whole. Moreover, the fact that stands out most
clearly in the behaviour of the lower organisms is this:

192 ANIMAL BEHAVIOUR

" Each stimulus causes as a rule not merely a single definite
action that may be called a reflex, but a series of ' trial '
movements, of the most diverse character, and including at
times practically all the movements of which the animal is
capable" (Jennings, 1906, p. 280).

6. Tropisms.

From chains of reflexes, suffused with awareness, it is not
difficult to pass to the level of instinctive behaviour, but
before we pass to that level we have to recognise the important
role played by tropisms (see Loeb, 1918). Tropisms are
obligatory or forced movements of the creature as a whole,
which more or less automatically secure physiological equi-
librium in relation to outside stimuli, such as light or heat,
gravity or electricity, diffusing chemicals or water-currents.
When a moth, constitutionally adapted to nocturnal activity,
comes in its flight within the sphere of influence of a candle,
and has one eye much more illumined than the other, owing
to the direction in which it happens to be flying, more intense
chemical processes are set up in the illumined eye. On that
side there is therefore a relative increase in the mass of
certain chemical products. But messages, impulses, stimula-
tions, or waves of chemical reaction are always passing from
the brain of the flying moth to the contracting muscles, and
if the physiological symmetry of the brain has been disturbed
by the unequal illumination of the eyes, the muscles on the
more illumined side are thrown into a state of stronger ten-
sion or tonus, with the result that they will respond more
forcibly to stimulation from the brain, and will therefore
turn the head and body of the moth directly towards the
candle near which it is flying. " As soon as the plane of
symmetry goes through the source of light, both eyes receive

ANIMAL BEHAVIOUR 193

again equal illumination, the tension (or tonus) of sym-
metrical muscles becomes equal again, and the impulses for
locomotion will now produce equal activity in the symmetri-
cal muscles. As a consequence, the animal will move in a
straight line to the source of light until some other asym-
metrical disturbance once more changes the direction of mo-
tion ' (Loeb, 1918, p. 14). Such, in outline, is Prof.
Jacques Loeb's ingenious and convincing theory of the tro-
pism or ' forced movement ' which brings the moth into the
candle.

Tropistic actions are obligatory in the sense that every
creature of the same kind and in the same physiological
state will in similar circumstances behave in the same way ;
there is no alternative. But it is a very notable fact, to
be carefully thought over, that a tropism may be changed,
reversed, or annulled by changes in the physiological con-
dition of the body or by changes in the surrounding medium.
The common Amphipod Crustacean Gammarus of fresh-
water pools always moves away from light that is its tro-
pism, but add the least trace of acid to the water, and it
moves towards the light as if a drop of philtre changed
the creature's whole nature !

The tropistic movements often appear as if they had a very
definite external aim such as the candle but that is illu-
sory. The orientation is physiologically coerced. There is no
desire of the moth for the star. It should be noted that
their general adaptiveness is not contradicted by cases like
the moth flying into the candle, for organisms are not and
could not be adapted to the altogether exceptional and un-
natural. In some cases one tropism way thwart another,
and it may be that a tropistic movement is sometimes in-
terrupted by some strong internal stimulus such as a desire.

194 ANIMAL BEHAVIOUR

Oiie of the criteria of organisms is the power of retention
or registration which eventually finds remarkable expression
in human memory, and the general view we wish to suggest,
as a clue to the maze of animal behaviour, is that there
has been at level after level a process of automatisation or
organisation, which makes for economy of time and energy,
and also, if it does not go too far, leaves the organism free
for experiment and initiative. So in established reactions,
in reflex actions, and in tropisms we see enregistrations
which are, in a way, off the main line of advance.

Besides established reactions, reflex actions, and tropisms
there are rhythmic activities adjusted to external periodici-
ties, such as change of position in shore animals when the
tide goes out or comes in. That these may be more than
tropisms is shown by cases where the rhythm is so engrained
in the creature's constitution that it persists for a time in
periodic expression even when the external stimulus has
ceased. The interesting green worms called Convolutas,
well-known on some flat beaches, such as that of Roscoff,
come up to the surface of the sand when the tide goes out,
and retreat again when the tide comes in. Bohn has found
that they will continue doing this for a couple of weeks
in an aquarium away from the sea. Similarly, some hermit-
crabs which make for the light at high tide and away from
the light at low tide have been observed doing this for some
time at the proper hours in a tideless aquarium.

It is a question for expert discussion and further experi-
ment how far the conception of tropisms will carry us as
an interpretation of the ways of the lower animals. Loeb
believes it will cover most cases; Jennings thinks its scope
is narrowly limited. Just as tropisms differ from ordinary
reflexes in being usually adjustments of the animal as a

ANIMAL BEHAVIOUR 195

whole, so behaviour differs from tropisms in being an effec-
tive concatenation or correlation of successive adjustments.
In a tropism there is really but one adjustment, which is
repeated over and over again. In behaviour there is trial
after trial of different reactions, and a selection of the best
available result.

7. Non-intelligent Experimentation.

Preoccupation with reflexes and tropisms is apt to lead
to an ignoring of the ' trial movements 7 which are common
among the lower animals. " Unprejudiced observation of
most Invertebrates will show that they perform many move-
ments which have no fixed relation to sources of external
stimuli, but which do serve to test the surroundings and
thus to guide the animal ' (Jennings, p. 247). Prof. S. J.
Holmes writes to the same effect and gives many illustra-
tions : " The lives of most insects, crustaceans, worms, and
hosts of lower Invertebrate forms, including even the Pro-
tozoa, show an amount of busy exploration that in many
cases far exceeds that made by any higher animal. Through-
out the animal kingdom there is obedience to the Pauline
injunction, ( Prove all things, hold fast that which is good ;
(quoted by Jennings, p. 250).

Among simple multicellular animals there is, one must
admit, not a little of that restless locomotion which we see
in Infusorians and the like, which we have called general
organismal activity. But at any moment this may give
place to more definite behaviour. The creature commands
its course and is neither blown hither and thither by every
tropistic gust nor bound by reflex routine. It makes sensori-
motor experiments which work towards an end, such as the
systematic exploration of a corner in search of food. It

196 ANIMAL BEHAVIOUR

shows control and selection. It may profit by experience,
even though it has no brain.

The sea-anemone AniJioldba, reticulata, described by
Burger, usually lives on the back of a crab. If it be re-
moved it fixes itself to the stony floor of the sea and spreads
its tentacles, biding its time. After four or five days it
frees itself and turns upside down. Now if the upturned
base of the sea-anemone be touched by a crab's leg, it lays
hold, folding itself about the limb. " It now, in the course
of several hours, climbs up the crab's leg to its back, where
it establishes itself. The sea-anemone thus by its own activ-
ity attains the extraordinary situation where it is usually
found. The whole train of action is like that shown in the
complicated and adaptive instincts of higher animals '
(Jennings, p. 197).

As the type-case of what we propose to call simply organis-
mal behaviour (or perhaps sensori-motor behaviour), we take
the attack which the brainless, ganglionless starfish makes
on the brainless, ganglionless sea-urchin (see Prouho, 1890).
The starfish lays an arm upon the spinose surface of the
sea-urchin and grips with its suctorial tube-feet. The sea-
urchin responds by biting with its numerous snapping organs
or pedicellariae which close on the tube-feet. The starfish
then draws away an arm, wrenching off the pedicellarise.
It repeats the process with the same or another arm until the
sea-urchin is cleared of its weapons. The starfish then pro-
trudes a portion of its highly elastic stomach over its victim,
and the business is over. Now some of the items in the pro-
cedure are probably purely reflex, such as the attachment
of the tube-feet, but the point is that the starfish exhibits a
chain of actions, certainly not in the line of least resistance,
which are mutually adjusted or correlated in such a way

ANIMAL BEHAVIOUR 197

that they bring about an end. How the conative bow of
the starfish was bent towards that end and kept towards
that end, who shall tell us, but that we have here to do with
behaviour seems undeniable. It appears to us to be an
important fact that ganglionless animals show a trial-and-
error method, a selection of the responses that put things
right, and for a short time, at least, a profiting by experience.
We cannot call this intelligent behaviour, but it is objec-
tively the counterpart of intelligent behaviour.

This stage in the evolution of behaviour may be said to
mark one of the great events in the history of life. As the
organism became more differentiated it was open to a larger
number of stimuli; as it gained a foothold in particular
situations " the door to choice was unlocked " ; as experience
began to be garnered it became possible for an internal im-
pulse to control the natural reaction to a stimulus. This
was the dawn of freedom.

8. Instinctive Behaviour.

When a spider makes a web or the bees a honeycomb,
when a digger-wasp paralyses insects and stores them in its
burrow as provender for its offspring, when a male stickle-
back builds a nest, when a young moorhen swims deftly the
first time it touches the water, we have to deal with instinc-
tive behaviour. It reaches its climax and its purest expres-
sion in Arthropods, such as ants, bees, and wasps ; in birds
and mammals it is more likely to occur in co-operation with
intelligence.

There seems indeed to be a sharp contrast between what
Sir Kay Lankester calls the big brain type, which reaches its
finest development in birds and mammals, and the little brain
type, the climax of which is in ants, bees, and wasps. The

198 ANIMAL BEHAVIOUR

big brain type is relatively poor in ingrained capacities of
instinctive behaviour but is eminently educable: the chick
reared in an incubator in the laboratory does not recognise
what water is, even when it is thirsty and standing in it;
it does not know what its unseen mother's cluck means ; and
it will stuff its crop once or twice with worms of red worsted.
But it learns to find its way about with prodigious rapidity.
The little brain type is rich in ingrained capacities of in-
stinctive behaviour, but is relatively non-educable. If a bell-
jar be placed over the nest of a ground-wasp, from the
door of which the inmates are wont to fly away, they are
psychically unable to force a path out amid the herbage
pressed down by the edge of the glass. Even when those
outside force a way in, they cannot come out again, or give
their fellows a hint how to escape.

It must not be supposed, however, that the little brain type
is unable to profit by experience. We know in fact that they
build up complex chains of associations. It is instructive
to recall Professor Yung's experiments with hive-bees. Of
20 taken in a box into the country 6 kilometres from
Geneva, 17 returned; of those 17 taken next day out on
to the lake, none returned. This is to be contrasted with
the successful return of the terns which were taken from
Bird Key in the Tortugas to Cape Hatteras, 850 miles into
seas never before visited; yet some returned in safety to
their nests.

Those who incline to use in reference to ants and bees,
crabs and spiders, the terms we need in describing our own
activities, should remember the great differences in the plan
of the nervous system in the respective ranks of Arthropods
and Vertebrates. In the former there is much less centralisa-
tion; the cerebral ganglia are connected with a ventral chain

ANIMAL BEHAVIOUR 199

of ganglia which are able to control many actions by them-
selves. We must remember that a wasp or a bee may go
on feeding after its tail has been cut off, as Baron Mun-
chausen's horse went on drinking after most of its body had
been shot away. Even a decapitated insect can do a good
deal, like St. Denis who walked round the town with his
head in his hands. But whatever may have been the saint's
reflections, we may be sure the insect has none.

Before going further let us take a thoroughly typical
instance of instinctive behaviour, and there is no better
than that of the Yucca Moth (Pronuba yuccasella) , which
has been often cited. When the large yellow bells of the
Yucca open, each for a single night, the silvery moth, just
emerged from her chrysalis, sets forth to visit them. From
the anthers of one she collects pollen, which she kneads into
a ball, and holds beneath her head. She flies to another
flower, pierces the pistil with her ovipositor, lays her eggs
among the ovules, and then places the fertilising pollen-
pellet in the funnel-shaped opening of the stigma. Without
the pollen thus brought by the moth the ovules would not
develop. The larva? of the moth eat a share of the developing
ovules, but not more than about half are required. So that
both plant and insect are served. In referring to this ex-
traordinary case Prof. Lloyd Morgan writes : " These mar-
vellously adaptive instinctive activities of the Yucca moth
are performed but once in her life, and that without in-
struction, with no opportunities of learning by imitation,
and, apparently, without prevision of what will be the out-
come of her behaviour; for she has no experience of the
subsequent fate of the eggs she lays, and cannot be credited
with any knowledge of the effect of the pollen upon the
ovules. The activities also illustrate what is by no means

200 ANIMAL BEHAVIOUR

infrequent in the more complex instincts, namely, the serial
nature of the adaptation. There is a sequence of activities,
and the whole sequence is adaptive in its nature."

What are the general characteristics of instinctive be-
haviour as exhibited by animals like ants, bees, and wasps,
of the little brain type?

(1) Instinctive behaviour in its typical form is always
specific or particulate. The garden-spider's web is not like
the hedge-spider's web; the nest of one wild-bee is not like
another's ; each wasp has its own victims which it deals with
in its own way; the female butterfly lays eggs on specific
food-plants which are appreciated not by her but by the
future caterpillars ; and so on. Another aspect of the par-
ticulateness is a certain wooden lack of plasticity.

(2) The routine of instinctive behaviour has often a con-
siderable degree of perfection the very first time, and while
it may be improved by practice, it certainly does not require
learning or experimenting. In other words, the instinctive
behaviour depends upon a hereditary predisposition of the
nervous system. Professor Driesch has defined instinctive
behaviour as " a complicated reaction that is perfect the
very first time ", but this inclines to be too hard and fast,
for there is a certain amount of individual development in
some instincts. ISTone the less Paley expressed one of the
characteristics of instinct when he spoke of it as " a pro-
pensity prior to experience and independent of instruction '\
Instinctive behaviour * just comes ' when the organism is
exposed to the appropriate stimulation.

(3) The capacity for a particular piece of instinctive be-
haviour is shared with approximate equality by all like mem-
bers of the species. All the female spiders of a given species
make an equally fine web; all the males an equally inferior

ANIMAL BEHAVIOUR 201

one. The capacity is often very markedly sex-linked, the
one sex doing with perfect finish what the other does not do at
all; thus the drones of the bee-hive take no part in comb-
making. One must not, of course, suppose that instinctive
capacities are not variable; the point is rather that instinc-
tive equipment is much more uniform than intellectual en-
dowment. It may be admitted that part of the individuality
of intelligence is due to the fact that intelligence is as much
made as born, which brings us back to the contrast that
instinctive capacity is much more inborn than made.

(4) Instinctive behaviour is always adaptive to the nor-
mal conditions of the animal's life, though it may prove in-
effective or misleading in face of peculiar exigencies. It
has to do with particular events and circumstances, particular
stimuli and configurations, which frequently recur, or, if not,
are of vital moment (as in the escape from the imprisoning
egg-shell) ; and a slight change in the conditions is likely
to result in extraordinary nonplussing.

A study of these limitations tends to impress us with the
difference between purely instinctive behaviour, and that
experimental, inferential, or reflective kind of behaviour
which we call intelligent. Let us illustrate.

The veteran French naturalist Fabre, who died in 1915
at the age of ninety-two, relates that he induced a long file
of procession caterpillars to move round the circular parapet
of a fountain, and by making the head of the leader touch
the tail of the last member formed a living circle which
continued for days circumambulating futilely. " They knew
nothing about anything." The grub of the mason-bee is
hatched in a mortar-cradle with a lid through which it has
to cut its way. This it does without difficulty. If the
lid be artificially thickened by gluing on a piece of stout

202 ANIMAL BEHAVIOUR

paper, this makes no difference to the success of the boring.
But if a little empty paper box be placed over the lid the
grub emerges into this, and having completed the boring
part of its inborn routine cannot recommence it, and dies
in its paper prison. Limitations of this sort are quite char-
acteristic of purely instinctive behaviour and seem to remove
it far from intelligence.

But the rigidity of instinctive routine must not be exag-
gerated. Professor and Mrs. Peckham have made a careful
study of the instincts of wasps, both solitary and social.
Several of the solitary forms go through the same general
routine, but with interesting generic, specific, and even indi-
vidual differences. When the female Ammophila, for in-
stance is ready to lay eggs, she makes a hole in the ground,
closes it up, searches for some kind of prey (such as a cater-
pillar), stings it several times and pinches it, drags it to
the nest, lays it down, opens the nest, drags in the paralysed
victim, deposits an egg beside it, and then covers up the hole.
On the whole it works like clockwork, but there may be
variations and mistakes at every step! Moreover, in the
wasp's routine there is probably help from intelligence-
in choosing a good site, in adapting the shape of burrow to
the soil, in remembering the locality, in biting at the prey
to suit the size of hole, and so on.

The general characteristics of instinctive behaviour have
been admirably summed up by Prof. Lloyd Morgan. " In-
stinctive behaviour is that which is, on its first occurrence,
independent of prior experience; which tends to the well-
being of the individual and the preservation of the race;
which is similarly performed by all the members of the same
more or less restricted group of animals and which may
be subject to subsequent modification under the guidance of

ANIMAL BEHAVIOUR 203

experience. Such behaviour is, I conceive, a more or less
complex organic or biological response to a more or less
complex group of stimuli of external and internal origin,
and it is, as such, wholly dependent on how the organism,
and especially the nervous system and brain centres, have
been built through heredity under that mode of racial prep-
aration which we call biological evolution ' (Instinct and
Experience, 1912, p. 5).

It is confusing to use the term instinctive so loosely that
it becomes almost equivalent to hereditary or inborn, as in
phrases like instinctive pugnacity or instinctive gregarious-
ness, for the usefulness of the term is in reference to specific
behaviour. Yet it may be legitimate and useful to distin-
guish between general instinctive tendencies and specialised
instinctive behaviour. A general instinctive tendency is the
expression of an inborn impulsion which has not much par-
ticular content, such as is shown by mammals who are about
to become mothers for the first time, or by an isolated hen-
bird who fumbles at nest-making, or in the so-called i sex-
instinct '. Thus we ourselves have many instinctive ten-
dencies, but few instincts. These general instinctive ten-
dencies are to be distinguished from fundamental appetites
such as hunger, and also from general tropisms, illustrated,
for instance, when young birds gather under a tea-cosy as
under a mother where we have evidently to do with sim-
ilar responses to similar stimuli.

9. Theories of Instinct.

It is too soon to come to any hard-and-fast conclusion
in regard to the nature of instinctive behaviour. We have
not yet got the facts fully before us, and there is much
need of more experimental study. It is almost certain that

204 ANIMAL BEHAVIOUR

there are different grades of instinctive behaviour. There
are three main theories at present in the field. (A) Some
investigators rank instinctive behaviour as closely comparable
to chains of reflex actions, and as due to non-cognitive hered-
itary predispositions to follow a certain routine when a
number of stimuli present themselves. (B) Others regard
instinctive behaviour as quite inseparable from intelligent be-,
haviour. (C) According to a third view, instinct and in-
telligence are two radically different though often co-opera-
tive kinds of knowing, which have evolved along divergent
lines.

(A) Some investigators rank instinctive behaviour as near
compound reflex actions, as the outcome of non-cognitive
hereditary impulsions or predispositions to enter upon a
certain routine when a certain trigger is pulled, and to follow
on in a perfectly definite manner, the result of one trigger-
pulling leading to another trigger, and so on. This may be
called the reflex theory of instinctive behaviour, and it is
often held by mechanists in the strict sense. It may, how-
ever, be held by biologists who admit that vital processes
cannot be adequately re-described in terms of chemistry and
physics, who are, however, unwilling to admit in instinctive
behaviour any reality beyond the physiological processes of
the animal's nervous system. We shall call it, therefore, the
reflex theory, rather than the mechanistic theory of instinc-
tive behaviour.

Instinctive behaviour agrees with reflex acts in not re-
quiring to be learned, in being dependent on hereditary
nervous predispositions, and in being exhibited approxi-
mately in the same way by all similar individuals of the
species.

It differs from reflex acts in being the activity of the

ANIMAL BEHAVIOUR 205

organism as a whole and in requiring (with few exceptions)
an intact nervous system. It differs also in sometimes hav-
ing some measure of plasticity or of variability, which is
quite unknown in reflex actions. It differs also inasmuch
as it does not always consist of acts soon over and done
with and attaining a result useful in itself; it is often a
unified many-linked concatenation of acts, working towards
a distant result. In many of the chains of instinctive be-
haviour connected with parenthood, the end is very remote,
sometimes never experienced ; and making a dark burrow
in a bank can hardly be its own reward. To describe in-
stinctive behaviour as nothing more than a series of intri-
cately dovetailed reflex actions suggests a false simplicity
slurring over the characteristic unification or concatenation.
Considered physiologically, instinctive behaviour is based
on neuro-muscular prearrangements, but to many naturalists
it seems impossible to do descriptive justice to what takes
place without supposing that the behaviour is suffused with
awareness and sustained by. endeavour.

According to Prof. W. McDougall, the higher or more
complex instinctive activities are much more than compound
reflexes. They are induced not by simple sense-impressions
as reflexes are, but by complex groups of sense-stimuli, such
as some scene. Thus insects visiting flowers show " a total
complex reaction to a total complex sense-impression ".
There is meaning or significance in it ; and a sustaining cona-
tion or endeavour.

Prof. Lloyd Morgan holds an interesting view which
seems more applicable to the * big brain ' than to the ' little
brain ' type. Instinctive behaviour he regards as physiologi-
cally akin to reflex action ; it consists of concatenated reac-
tions of the whole organism. The capacity for this in birds

206 ANIMAL BEHAVIOUR

and mammals probably has its seat in parts of the brain
below the cerebral cortex. But the lower centres stimulate
the higher centres and intelligence qualifies the instinctive
behaviour.

On Prof. Lloyd Morgan's view, intelligent guidance is the
function of the cerebral cortex with its distinguishing prop-
erty of consciousness ; the co-ordination involved in instinc-
tive behaviour, and in the distribution of physiological im-
pulses to the viscera and vascular' system is the primary
function of the lower brain-centres ; in instinctive behaviour
as such, consciousness correlated with processes in the cere-
bral cortex is, so to speak, a mere spectator of organic and
biological occurrences at present beyond its control ; but, as
spectator, it receives information of these occurrences through
the nerve-channels of connection between the lower and the
higher parts of the brain. Thus instinct and intelligence
are different organs, but they co-operate, and as intelligence
is kept more or less informed of the steps of instinctive
behaviour it is sometimes on the spot to help the animal out
if some critical situation arise which the routine-behaviour
cannot meet.

Some who think that it is feasible to interpret instinctive
behaviour biologically as a concatenation of reflexes are at
the same time willing to admit that there may be a psychical
accompaniment which does not rise to the cognitive level.
Thus Minkiewicz, who has made very important experiments
on animal behaviour, regards instinctive performance as im-
plying " a certain low form of unconscious, but none the less
purposive psychical activity ".

(B) Others regard instinctive behaviour as inseparable
from intelligent behaviour. Thus Professor Stout regards in-
stinctive behaviour as being biologically a concatenated series

ANIMAL BEHAVIOUR 207

of reflex-like actions, dependent on hereditary neuro-mus-
cular prearrangeraents. Subjectively, however, it shows
" conative impulse, unity and continuity of attention, per-
severance with adaptive variation of behaviour correspond-
ing to felt success or failure, and, in many cases, the evi-
dence of having learned by experience ". " The congenital
prearrangements of the neuro-muscular mechanism for spe-
cial modes of behaviour do not of themselves suffice to ex-
plain the animal's conduct. Their biological utility depends
from the outset on their operation being sustained, controlled,
and guided by intelligent interest in the pursuit of ends."
It seems to us that this view fits the blended instincts of
birds much better than the pure instincts of bees.

According to Prof. C. S. Myers there is but one psychologi-
cal function- -instinct-intelligence. " In what is ordinarily
called instinctive behaviour the innate mechanism is rela-
tively fixed and given ; in what is ordinarily called intelli-
gent behaviour the mechanism is relatively plastic and ac-
quired. But I maintain that such differences are only rela-
tive and that no mental state (or process) can be spoken
of as solely instinctive or as solely intelligent."

(C) A third view, particularly associated with Professor
Bergson, regards instinctive behaviour and intelligent be-
haviour as two quite different kinds of efficiency, implying
different kinds of knowing.

If we define intelligent behaviour as that which involves

d'

objectively some trial-and-error experimenting and profiting
thereby, and subjectively some perceptual inference, we may
say that instinctive behaviour differs in being non-experi-
mental (though it may improve as the result of experience)
and non-inferential (though not necessarily destitute of
awareness). It is the impression of many observers that

208 ANIMAL BEHAVIOR

instinctive behaviour differs from intelligent behaviour in
the rigidity of the routine and in the absence of awareness
of the end to be attained. In intelligent behaviour, as we
know it in ourselves, there is an awareness of ends as ends,
and there is a power of adapting old means to new ends.
But it is only by an argument from analogy that we can
speak about absence or presence of awareness, and even in
intelligent behaviour the degree of awareness varies greatly
in intensity.

According to Professor Bergson, instinct and intelligence
differ in kind and have evolved on divergent paths. The ways
of ants and bees cannot be described as intelligent. As Prof.
H. Wildon Carr puts it, " the fundamental difference lies
in the mode of apprehension of reality, and the kind of
knowledge that serves the activity of each ". " We can
never know what this instinctive knowledge is." But we
may approach it sympathetically in our power of intuition
" a direct vision of reality that is not clothed, so to speak,
with the categories of the understanding ". " This reality
is the living activity itself apprehended as a real duration."

One of the fundamental sentences in UEvolution Creatrice
is this: " The cardinal error which, from Aristotle onwards,
has vitiated most of the philosophies of nature is to see in
vegetative, instinctive, and rational life three successive
degrees of the evolution of one and the same tendency,
whereas they are three divergent directions of an activity
that has split up as it evolved. The difference between them
is not a difference of intensity, nor, more generally, of degree,
but of kind." To this, M. Bergson has, indeed, immediately
to add that intelligence and instinct are rarely to be caught
pure, for instinct is often accompanied by gleams of intelli-
gence (seen, for instance, when hive-bees nest in the open

ANIMAL BEHAVIOUR 209

air), and there is no intelligence in which some traces of
instinct are not to be discovered.

Intelligence uses unorganised instruments tools; instinct
uses inborn organised instruments. The innate knowledge in
instinct is of tilings, of particular pieces of matter ; the innate
knowledge in intelligence is of relations, of forms. Instinct
implies intimate and full awareness of a particular configura-
tion of things; intelligence makes frames applicable to many
things. If instinct has signs or words, they are adherent,
" invariably attached to a certain object or a certain opera-
tion ". Intelligence has mobile signs, which can pass from
things to ideas, and this language has been a great liberator.
In short, instinct and intelligence are quite different expres-
sions of life. As to the much-debated question whether in-
stinct is conscious or not, Professor Bergson holds that there
may be lively consciousness in some cases, and that it may be
nullified in others. Consciousness is the light that plays
around the zone of possible actions, in the interval between
representation and action ; it is associated with hesitation
and choice. Therefore since there is much choice in intelli-
gent behaviour and little in instinctive behaviour, the latter
tends to be less conscious than the former.

The position that instinctive behaviour is on a different
evolutionary tack from intelligent behaviour may be defended
apart from Professor Bergson's particular view of the differ-
ence. When we observe a spider executing an extraordinarily
complex and sharply punctuated series of movements which
result in a web and doing this effectively the very first time,
we seem to be in a world different from that of intelligence.
And again when we observe insects continuing to go through
a laborious routine which has lost all its point, and from
bondage to which the least modicum of intelligence would

210 ANIMAL BEHAVIOUR

deliver them, we seem to be in a world very different from
that of intelligence.

While the frequent limitations of instinctive behaviour
seem to us to point to a differentia between it and intelligent
behaviour, we find further evidence in considering its achieve-
ments in preparing for the unforeseen and remote for off-
spring which will never be seen, for the evasion of a winter
which will never be experienced. There is an adjustment
of means to ends which certainly does not rest on a basis
of individual experience. It is possible to say that this
organisation for the attainment of remote and unknown ends
is the inherited result of an originally intelligent prevision,
but there are great difficulties in face of this theory. There
is certainly inherited organisation, but there is no evidence
that the instinctive behaviour ever passed through an intelli-
gent phase. In simple cases, we can imagine a sort of
intelligent argument from analogy : thus the woodpecker-like
bird, Colaptes mexicanus, feeds on insects while it can, but
stores acorns against the day when no insects will be availa-
ble. But no analogy can suggest making elaborate provision
for offspring that are never seen.

If we rule out the theory that instinctive behaviour has
no psychical side, for that is an outrageously false simplicity,
we may say that there is a considerable amount of common
ground between the various theories. There are plainly two
aspects of instinctive behaviour objective and subjective.
There is the hereditary organisation of the nervous system
which has been so prepared or evolved that the specific be-
haviour comes automatically when the organism is appropri-
ately stimulated. But there is also the associated instinctive
experience, some degrees of awareness of the situation, some
memory of analogous past experiences, some more or less dim

ANIMAL BEHAVIOUR 211

consciousness of an end. Along with this cognitive factor
there is a conative one, a predetermined hen ding of the con-
stitutional bow in a particular direction. And there may also
be, in some cases, an evocation of associated emotions.

According to Professor McDougall, instinct is a functional
unit which is transmitted as such from generation to genera-
tion, but it implies the existence in the creature's innate
constitution of three things " first, a specialised perceptual
disposition; secondly, a specific conative tendency that is ex-
cited when this perceptual disposition is played upon by the
appropriate sense-impression; and thirdly, some co-ordinated
system of motor channels through which the conative tend-
ency works towards its satisfaction ".

Less technically we may say that there is (1) some degree
of awareness of what is being done, (2) a feeling of activity
and a bent bow, and (3) the constitutionally ingrained link-
ages which make a chain of reflex-like acts possible.

10. Evidence of Intelligent Behaviour.

Especially among birds and mammals we find behaviour
which cannot be adequately described without using psycho-
logical terms. It implies, objectively, some i trial-and-error '
experiments and profiting thereby, some ' learning ' that is
more than woodenly associative, something more than the
dog's secretion of salivary juice when the dinner whistle is
blown. We infer that it implies, subjectively, some per-
ceptual inference, some working with ideas, some apprecia-
tion of the relations of things. It is reflective and experi-
mental as contrasted with reflex and instinctive.

The Greek eagle lets the tortoise fall on the rocks so that
it is broken, just as the rook does with the fresh-water mus-
sel. The collie anticipates a possible straying of the flock

212 ANIMAL BEHAVIOUR

and guards against its occurrence. Beavers cut a canal right
through an island in a big river a task not practically justi-
fied till it is completed. It is strictly impossible to prove
that these animals really put two and two together as we
do in perceptual inference, but no less generous interpreta-
tion seems adequate.

When Dr. G. T. Romanes's chimpanzee was asked for a
number of straws up to five, it used to pick up the required
number and present them with the ends exposed between
finger and thumb. When it was right it got its reward. Some-
times, however, if asked for four straws, it would gather three
to save time and double one of them so that four ends showed.
When a reward was refused on such occasions, it would
straighten out the doubled straw, pick up another one, and
present the required number. In a case of this sort we are
inclined to admit intelligence, for it was rather subtle and
novel, and we know that the chimpanzee has a highly de-
veloped brain.

But pass to one of Miss Drzewina's experiments with
hermit-crabs. She removed them from their borrowed shells
and gave them similar shells which had been plastered up.
The hermit-crabs spent a long time trying to get into these
closed shells. Eventually, however, they gave it up as hope-
less, as of course it was. When some shells of the same
sort, but empty, were put into the aquarium the hermit-
crabs would not look at them. The established association
was too strong. Yet when some other shells of a different
shape were introduced, the hermit-crabs tried them at once.
The question is whether this also was intelligent behaviour,
or whether it illustrated what we do not understand, a profit-
ing by experience on a lower than an intellectual level, such
as must form the basis of the very effective agency of the

ANIMAL BEHAVIOUR 213

brainless, ganglionless starfish already referred to. And our
inclination to be parsimonious in our interpretation is of
course strengthened by the fact that the hermit-crab belongs
to the i little brain ' type of organisation on quite a different
line of evolution from Vertebrates. Many spiders are read-
ily deceived if a vibrating timing fork is brought near their
web. They rush out to deal with the situation responding
to the familiar tremor stimulus. They may be cheated over
and over again. In one case, however, after a tantalising
deception extending over fifteen days, the spider ceased to
give any attention to the tuning fork. The question is
whether we must in such a case postulate memory and per-
ceptual inference, or whether some purely physiological in-
terpretation is adequate. Thus the ( getting used to ' a stim-
ulus may be in some cases due to fatigue, in the wide sense,
including dulled sensation. Our inclination to a parsimoni-
ous interpretation in such a case as this is strengthened by
the fact that even brainless and ganglionless animals illus-
trate a modification of activity by individual experience.
Repeated stimulation alters ' the physiological condition ' of
an animal so that it gives an intensified reaction to a mod-
erate stimulus, as in the case of an earthworm that has been
teased a little. Contrariwise, repeated stimulation that leads
to nothing may result in the suppression of a reaction, as in
sea-urchins that soon stop answering back to fruitless changes
in light and shade, or in sea-anemones that cease to respond
to the touch of false food. Even the carnivorous plant,
Venus's Fly Trap, refuses to be duped many times in suc-
cession.

One of the marks of intelligence is profiting by experience
learning. At a lower level there is temporary modification
of behaviour, and this passes, insensibly -we think, into last-

214 ANIMAL BEHAVIOUR

ing modification. A crab or a crayfish learns in a week or
two to distinguish infallibly between the right way and the
wrong way to food and freedom. How far down this capac-
ity extends we do not know; perhaps it requires a nervous
system of considerable complexity. If we obey the law of
parsimony, we are led to the conclusion that the creature
under sufficient stimulus of reward and " of shortening a
period of unpleasantness and unrest ", forms a habit without
' knowing how ', though probably with high-strung attention
and delicate quivering sensitiveness, and precise registration
of sequences of movements ; and that after the trick has been
learned it trusts itself, as a piano-player does who learns in
quite a different way. Miss Washburn notes that " an ani-
mal that has gone astray on the path will often find the way
back to the starting-point, and from there traverse the whole
road rapidly and unerringly, apparently in the same way
that a piano-player who has a piece " at his fingers' ends ",
but has stumbled in a passage, can go through with entire
success if he starts over again. As piano-players know,
in such a case it is much better not to attend to stimuli
at all, but to think of something else; the movements will
take care of themselves better if consciousness intervenes as
little as possible" (1909, p. 231).

Many experiments have been made with rats, dogs, cats,
chicks, and other creatures, which learn in the course of
time to find their way out of labyrinths and puzzle-boxes.
After some practice they are left in peace for a few days
and then replaced in the previous situation. It is observed
that they make fewer useless movements, that they sometimes
make none. The question is whether ideas are at work,
whether the creatures think. Have they remembered images
of their successful movements, or do they obey the prompt-

ANIMAL BEHAVIOUR 215

ings of an organismal registration in which ideas have not
been involved ?

In her admirable book on The Animal, Mind, Miss Wash-
burn points out that images of a Hampton Court maze are
difficult, and that the slow learning and the nature of the
mistakes do not suggest working with ideas. Similarly, in
regard to puzzle-boxes, she says that the slow learning, by
gradual elimination of useless movements, suggests the ab-
sence of any guiding idea of the action, and Professor Thorn-
dike, who initiated these experiments, corroborates this view
by pointing to the entire lack of inferential or reflective
imitation. That is to say, the successful behaviour of com-
panions does not seem to be suggestive. But other observers,
such as Professor Hobhouse, have come to the opposite conclu-
sion, and in any case, as has been well said, " We cannot
conclude that an animal is incapable of ideas because it does
not have them suggested to it under circumstances that would
suggest them to our minds."

11. Secondary Simplifications of Behaviour.

The difficulty of understanding animal behaviour is in-
creased by the occurrence of secondary simplification. We
are familiar with this in the individual habituation of ex-
ercises which originally required attentive selection and
detailed control. What required conscious regulation from
step to step becomes ' automatic ', requiring very little atten-
tion, and the objective side of this is believed to be the es-
tablishment of nerve-paths of least resistance, of linkages
such that one phase of the behaviour automatically evokes
the next. One of the features is the dropping out of what
is called implicit behaviour, a common name for the move-
ments, too slight for detection, which seem at first to inter-

216 ANIMAL BEHAVIOUR

vene, e.g., in type-writing and piano-playing, between the
external stimulus and the overt reactions when more than a
single reflex is involved.

There is not at present any convincing evidence that the
direct results of habituation can be as such entailed on the off-
spring, and there are few available facts in support of the
theory once widely held that instinctive predispositions to
go through a certain routine are the hereditary results of the
habituation of what was originally intelligent. That the
instinctive capacities are inborn is certain, but it does not
follow that they have been due to ' lapsed intelligence '. At
the same time, it is a fact of observation that the individual
performance of a piece of instinctive routine may bring with
it an increased perfection.

It is very interesting to find that particular reactions
periodically repeated may take such a grip of the individual
constitution that they are exhibited even in the absence of
the liberating external stimulus. It is probable that this
implies, in part at least, that long continuance of external
periodicities has established internal rhythms in some im-
portant part of the metabolism of the individual creature.

In the simplest forms of behaviour, which imply little
more than a co-ordination of a series of reflexes towards a
desired result, there must also be organic registration. This
is shown by the simple experiment of putting a starfish on
its back, for it learns to right itself more and more quickly
as time goes on. Although its effective behaviour is not
instinctive, for it has to be learned, nor intelligent, since
there are no nerve-ganglia, it improves with practice.

We shall return to the subject when we come to discuss
the evolution of behaviour, but in the meantime we notice
the suggestion that it is, metaphorically speaking, part of the

ANIMAL BEHAVIOUR 217

tactics of Animate Nature to economise mental activity for
higher issues by a structural organisation or registration
(badly called mechanisation) of capacities for effective
agency. Thus instinctive capacity being a substitute for
instruction may make emancipated experiment practicable,
as birds well illustrate.

12. Rational Conduct.

In the case of man, and probably in his case only, there
is sometimes evidence of rational conduct as contrasted with
intelligent behaviour. We cannot describe such conduct with-
out using general terms; we know personally that, like
original thinking, it involves experimenting with abstract
ideas ; it implies conceptual as distinguished from perceptual
inference ; it is controlled in reference to an ideal or pur-
pose. We wonder whether even at this level there may not
be a continuance of the organisation-process, for mathema-
ticians of distinction and other original thinkers assure us
of the reality of unconscious cerebration, and the absolute
trustworthiness of the immediate ethical judgment of fine
characters may be another illustration in a different field.
There is an assured immediacy of reaction in many cases
that makes the ordinary person marvel, and leaves the moral
genius free to tackle more difficult problems.

13. General Impressions of Animal Behaviour.

What we see is like a great staircase, exhibiting wonderful
perfection at different levels, such as those of tropisms, in-
stincts, and intelligence. We may distinguish a main line
of experimenting, ' trial and error ', and initiative from the
side lines in which organisation or automatisation of be-
haviour predominates over immediately controlled direction.

218 ANIMAL BEHAVIOUR

But while there is a hierarchy of activities, the diverse modes
often overlap. Just as the surface relief of a countryside
may show in one feature the outcrop of various strata of
very different geological age, so in an animal's behaviour
there is often a mingling of different kinds of activities uni-
fied in a way that baffles analysis. Instinct concatenates re-
flexes, and intelligence catches up tropisms. Instinctive
capacities may form a basis for an advance in intelligence ;
and intelligently controlled behaviour may sink into habit.
We have to distinguish in general (a) the ingrained or en-
tailed hereditary capacities of responding effectively to cer-
tain stimuli, circumstances, and situations; (&) the indi-
vidual tentatives, selections, adjustments, and ' learning '
which seem to many to imply some degree of awareness or
pre-awareness and some conative element; and (c) the in-
dividual retention and registration of experience which facil-
itates for the individual the rapid repetition of effective
reactions.

Our survey suggests some general impressions: (1) The
first is a deepening of rational wonder before the extraordi-
nary variety of ways in which living creatures express them-
selves, assert themselves, enjoy themselves, and bend the
Titan of the inorganic to their indomitable endeavour. An
unsophisticated but shrewd observer of Nature once said that
he could not understand a man intelligently watching an ant-
hill and remaining irreligious.

(2) The second is an impression of the pervasiveness of
a kind of behaviour which, considered objectively, is closely
analogous to what we know in our case to be associated with
intelligent control. The inference, which does not admit
of direct verification, is that consciousness in some form is
pervasive. We cannot well describe the behaviour of even

ANIMAL BEHAVIOUR 219

brainless animals without using words like selecting, trying,
learning, and profiting by experience. We cannot demon-
strate the existence of consciousness in the lower animals, but,
as Professor Jennings observes, " objective investigation is
as favourable to the view of the general distribution of con-
sciousness throughout animals as it could well be' (1906,
p. 337). " So far as objective evidence goes there is no
difference in kind, but a complete continuity between the
behaviour of lower and of higher organisms 7 (1906, p. 335).
We start at one end with our own doings, in some of
which intelligence counts, we pass gradually, though never
perhaps by rigid demonstration, through the behaviour of
our fellows, our horses and dogs, birds and fishes, spiders
and hermit-crabs, ganglionless starfishes and sea-anemones,
to the extraordinarily puzzling condensed individualities of
Infusorians and Amoebae, ISTor will it be easy to shut out
carnivorous plants and others that stir themselves in what
seems to us a sleep-life, whose dreams are flowers. At all
levels of organisation we find behaviour which, objectively
considered, is like our intelligent behaviour. We know that
in many cases the creatures are not so clever as they look,
and we do not know of any way of proving that mentality
pervades it all. But it is impossible to think of intelligently
controlled behaviour evolving from behaviour in which men-
tality was wholly absent, and it seems clearest to think of
all organisms as psycho-physical individualities.

(3) Third we get a vivid impression that the realm of
organisms stands out in strong relief against the inorganic
background. The not-living world is a domain of mechanical
necessitation, without initiatives; a domain of uniformities,
without alternatives; a domain of absolute determination,
without spontaneity; a domain where there is no individu-

220 ANIMAL BEHAVIOUR

ality, and therefore no behaviour. It is an interesting point
that the rare occasions on which one applies the term be-
haviour to a not-living thing are when one is dealing with
something like a ship to which man has given a quasi-indi-
viduality.

(4) Perhaps the most important question before us is
whether the behaviour of organisms has any real spontaneity,
precluding or limiting the possibility of prediction, or
whether the suggestion of spontaneity is fictitious and due
to the complexity of the conditions. It was once true to
say that the wind bloweth where it listeth, but now the
meteorologist tells us whence it comes and whither it goes.
Are we, in our ignorance or obscurantism, postulating for
the living creature a spontaneity and unpredictability such
as our forefathers believed to be exhibited by the wind ? This
is the problem of biological determinism, analogous to the
problem of psychological determinism and free will. We
venture to say just a little on this difficult problem.

As we ascend the scale of being there is a growing amount
of experimental indeterminism. An organism is free as com-
pared with a not-living system. When we begin experiment-
ing with a starfish, we cannot tell what it will do in the
various situations in which we place it, but after we have
experimented for a long time we can tell what the starfish
we have worked with will do under certain circumstances,
provided always that we know its ' physiological condition '.
For a hungry animal does not behave as a full-fed one does.
But when we are rash enough to make a prediction in regard
to the behaviour of a fresh starfish, of the same kind and
weight and size, we are very likely to be very far wrong.
Why is this ? It is otherwise in the inorganic world, where
we can safely argue from one thing to another thing of the

ANIMAL BEHAVIOUR 221

same kind. The difference is not one of complexity, but of
kind. The starfish is not mechanically necessitated to act
as it does ; it often checkmates mechanism. Even when we
say that it is coerced by its own brainless constitution we
must remember that it was itself in some degree an agent in
establishing that constitution.

Similarly, an animal with a big brain, i.e., a well-
developed capacity for intelligent behaviour, is free com-
pared with a starfish. By careful study we may reduce
the experimental indeterminism and predict with some suc-
cess what our dog will do in a particular situation. But we
are likely to make a bigger mistake than we made with our
starfishes if we argue from our dog to our neighbour's. For
why, the individuality of the dog is so much greater than
that of the starfish. The details of its behaviour are deter-
mined much less by its general constitution and much more
by the character which it has itself been an agent in building
up. Thus we see in the realm of organisms a ladder of
emancipation the evolution of free-will.

The impression which we get from the study of even star-
fishes seems to us to hold for the whole realm of Animate
Nature and for ourselves in it. We find neither systems of
absolute determinism nor i miscellanies of miracles ', but
systems in which determinism and freedom are both illus-
trated, sometimes more of the one and sometimes more of the
other. The enregistrations within an organism limit its
actions within certain trammels; the reflexes, the tropisms,
the instincts, the hereditary appetites are all determinist
in effect; but our conception of the typical organism is not
complete unless we recognise its possibilities of initiative
and experiment, of trial and error, of choice and control.
Perhaps we may profitably continue into the realms of ethics

222 ANIMAL BEHAVIOUR

and religion this compromise between determinist and free-
will interpretations which biology suggests.

SUMMARY.

Only in the realm of organisms is there true behaviour in which
the creature is an agent and exhibits a correlated or concatenated
series of acts, effective towards some definite result favourable to
the harmony of vital processes and the continuance of the race.

Among unicellular or non-cellular organisms there is often a
restless locomotor activity, hardly on the level of behaviour, which
is sustained by the everyday internal functions and is not very
clearly separable from them. There are also definite organic re-
actions to all sorts of stimuli except sound waves, corresponding
in a far-off way to reflex actions in higher animals. In difficult
situations there may be a trial-and-error procedure, a selection of
the fittest answer and a short-lived modification of behaviour in
relation to experience. As Professor Jennings especially has
shown, there is among the simplest animals the counterpart of
intelligent behaviour.

Of great interest is the shell-building of some of the arenaceous
Foraminifera, where particular materials, such as sponge-spicules,
are selected from amid an embarrassment of alternatives, and
where the selected material is utilised in a particularly effective way.

Reflex actions are usually movements of parts, uniform reactions
to a particular kind of external or internal stimulus, exhibited ap-
proximately to the same extent by all animals of the same kind,
and depending on inborn structural linkages of nerve-cells and
muscle-cells. But reflexes, though not alterable by experience, are
sometimes controlled by what looks like some appreciation of cir-
cumstances. ' Chain-reflexes ' are often broken.

Another simple form of animal activity is seen in tropisms
more or less obligatory movements, like the moth's to the candle,
which automatically tend to secure physiological equilibrium in
reference to particular stimuli. But the tropistic coercion is some-
times successfully thwarted by individual experiment on the part
of the organism.

One of the most important results of recent studies is the proof
that many brainless and even ganglionless animals, such as star-
fishes and sea-urchins, exhibit a counterpart of the intelligent be-

ANIMAL BEHAVIOUR 223

haviour of higher animals. They show a ' trial-and-error '
method, a selection of regulatory responses, and, for a short time at
least, a profiting by experience. There is experimenting below the
level of perceptual inference.

Among the more complex animals there seem to be two distinct
modes of effective behaviour, namely, instinctive and intelligent be-
haviour. The former finds its finest expression in the ' little brain '
types, such as ants, bees, and wasps ; the latter in the ' big brain '
types, such as birds and mammals. Each mode has its excellencies
and its limitations.

Instinctive behaviour agrees with reflex action in being dependent
on a hereditary nervous predisposition characteristic of the species,
but it is a concatenated series of correlated acts of the whole crea-
ture. There is a hereditary awareness of the practical significance
of certain things and configurations, and a hereditary impulsion
to a precise routine. The capacity may be improved by experience,
but it is to some degree independent of individual learning. It
is not experimental, inferential, or reflective like intelligent be-
haviour, and has very striking limitations. It is often linked with
intelligence, especially in the * big brain ' types, such as birds.

As regards the nature of instinct, there are three main theories
at present in the field, between which it is too soon to decide dog-
matically. (A) Some investigators rank instinctive behaviour near
reflex actions, as due to non-cognitive hereditary predispositions to
follow out a certain routine when a number of triggers are pulled.
(B) Others regard instinctive behaviour as quite inseparable from
intelligent behaviour. (C) According to others, instinct and in-
telligence are two radically different, though often co-operative,
kinds of knowing, which have evolved along divergent lines.

Among birds and mammals, in particular, there is evidence of
intelligent behaviour. It implies, objectively, some ' trial-and-
error ' experiments and profiting thereby. It implies, subjectively,
some perceptual inference. It is reflective as contrasted with in-
stinctive.

As is well known, a secondary simplicity often comes about in the
individual lifetime, when what originally required attentive selection
and detailed control becomes habitual. But it is not known to
what extent, if any, the results of habituation can be entailed on
the offspring. It seems at present improbable that instincts can
arise in this way. Yet, as will be seen later on, it seems to be
part of the tactics of Animate Nature to economise mental activity

224 ANIMAL BEHAVIOUR

for higher issues by a structural organisation (badly called
mechanisation) of capacities for effective behaviour.

In the case of man there is evidence of rational conduct on a
higher level than intelligent behaviour. It implies conceptual as
distinguished from perceptual inference, and is controlled in ref-
erence to general ideas, ' values/ or conscious purpose.

Four general impressions stand out: (1) The extraordinary
variety of ways in which living creatures express themselves, assert
themselves, and bend the Titan of the inorganic to their endeavour.

(2) The pervasiveness of mentality at all levels of organisation.

(3) The growing scope of spontaneity and individuality as we
ascend the series. (4) A gradual emancipation of the organism from
environmental coercion.

LECTURE VII.
THE PROBLEM OF BODY AND MIND,

LECTURE VII.
THE PROBLEM OF BODY AND MIND.

1. The Approach to the Problem. 2. What Must Be Recog-
nised from the Biological Side. 3. What Must Be Recog-
nised from the Humanist Side. 4. Various Theories of the
Relation of 'Mind' and 'Body'. 5. Monistic Speculation
along the Line of the Double-Aspect or Correlation Theory.

1. The Approach to the Problem.

IT is with a heightened sense of responsibility that we
turn to the ancient problem of the relation of body and
mind. But it is a question in regard to which the biologist
has something to say, and it cannot be evaded in a study
of Animate Nature nor in prolegomena to a philosophy of
Animate Nature. By the latter we mean a consistent think-
ing together of -what we know and feel about Animate Na-
ture along with what we know and feel about other orders
of facts.

As the view to which a biologist is most naturally led
may seem, at first sight, disappointing, and may even be
misunderstood as a capitulation of the citadel of personality,
we would plead that after we get past what seems to most
thinkers the quite untenable position of crude materialism,
with its Gothamite metaphysic, and what seems to most
scientific workers the quite untenable position of subjective
idealism, and the theory of epiphenomenalism, which is
materialism in modern garb, the conclusion we come to does
not imply any practical depreciation of the reality of the
bodily system and activity on the one hand, or of spiritual

227

228 THE PROBLEM OF BODY AND MIND

values and the thought-life on the other. If we avoid the
three fatal errors of false simplicity just mentioned, it is
not perhaps of great moment what theory monist or dual-
ist, parallelist or animist we are led to adopt. We must
choose the interpretation which is most consistent with the
rest of our thinking and experience.

What is familiar ground to the expert philosopher is full
of pitfalls alike to the biologist and to the man in the street,
and we probably do well to remind ourselves that the way
we put the question of the relation between mind and body
may be misleading. It is often asked: Is the body the real
thing and the mind a derivative illusion? Or is the mind
alone real and the body in some way dependent? These
questions are badly put, for both bodily activity and the
thought-life are real. A conviction of the actuality of the
body as an agent to be reckoned with need not imply that
the mind is in any way illusory. ISTor need a conviction of
the reality of the mind, readily reached by any one who has
ever made up his mind, imply that the body is not substan-
tial and effective. The practical truth is, that what we call
the mind counts, and that what we call the body counts; or
perhaps that what counts is body-mind or mind-body. So
far there is general agreement. But are there two distinct
and disparate real activities a player and an instrument,
so to speak, or is there one order including both bodily and
mental processes, metabolism and awareness of meaning?
Is there interaction of two orders of being, or correlation
within one order? (See Lloyd Morgan, 1915. p. 6.)

We know ourselves by our senses as organisms; we know
ourselves also as thinking, feeling, purposing, endeavouring
beings. For immediate experience there is unity. For
scientific purposes, however, it seems almost necessary to

THE PROBLEM OF BODY AND MIND 229

separate off the two aspects, or processes, or systems, and
the problem arises how we are to think of them in relation
to one another. But the fact is that ' body ' and ' mind '
are alike abstractions. Prof. A. E. Taylor has said : " The
severance of the original unity of experience into a physi-
cal and a psychical aspect is entirely a product of our own
abstraction-making intellect. ' Body ' and * Soul ' are not
given actualities of experience, but artificial mental construc-
tions of our own" (1903, p. 314).

Yet here again, while many of us are impressed in our
experience with the inter-dependence rather than independ-
ence of these " two aspects ' -bodily and mental we must
admit that we do not find it an easy task to explain what
we mean by the phrase " two aspects ' in this particular
connection. The words do not seem to grip.

In stating the problem Prof. Lloyd Morgan takes the
case of the processes involved in seeing a candle. The rays
of light affect the receptors of the retina, a physical related-
ness (a), but as the stimulus passes by optic neurones to
the visual centre in the occipital lobe of the cerebrum, there
is a superadded physiological factor (&), so that the entire
process may be called db. But if we definitely take note of
the candle and adjust ourselves deliberately to it there seems
to be a third kind of relatedness, a psychical process, so that
the whole process may be called abc. We have thus (1)
the receptors in physical relation to the physical object ;
(2) the visual centre in physiological and physical relation
to the receptors and through them to the object; and (3)
something in psychical relation in some way to the visual
centre, and through it to the receptors, and ultimately and
essentially to the candle as representing the external world.
This something we call the mind. (1915, p. 4) ...

230 THE PROBLEM OF BODY AND MIND

" The mind is somehow a mid-term receiving messages from
the object in the external world and issuing messages to the
organs concerned in behaving appropriately to that object.
Whenever the mind is thus effective in guidance we have
what we called a&c-process. The distinguishing feature in
such guidance is a context of meaning within a sphere of
interest." Using the term mind in this sense, we have to
consider its relation to the processes that go on in the cortex
of the brain, and, anticipating our subsequent discussion,
we may say that there are two main views. " According
to the first there are two radically distinct and wholly dis-
parate orders of being the mental order and the physical
order," which interact. " According to the second there
is only one order within which there are distinguishable
types of relatedness and of process, e.g., physical, physio-
logical, and psychical. Any given term may be coincidentally
related to other terms in these severally distinguishable ways.
This is the a&c-mterpretation already suggested." On the
second view the c process is always correlated with ab
processes ; on the first view the c process is independent of
any physiological correlate.

2. What Must Be Recognised from the Biological Side.

It is possible, as we have seen, to apply to a living body
many of the methods of chemistry and physics, and to give
chemical and physical descriptions of isolated observed
processes. The more that is done, the more will the distinc-
tively vital stand out in relief. If it can be shown that the
balsam's jerking out of its seeds admits of complete mechani-
cal description in terms of tensions, elasticity, and the like
the more obvious will be the distinctively vital factor in
the sundew's fly-catching successes. But no adequate chem-

THE PROBLEM OF BODY AND MIND 231

ico-physical description has yet been given of any distinc-
tively vital process. A new aspect of reality wells up within
organisms, which are material systems none the less, and
we require new concepts for its description. Even in their
simplest forms organisms are integrated systems, capable
of unified regulatory action and of registering experiences.
But just as the mechanical description has its limitations,
so is it with the biological. In our study of Animal Be-
haviour we have seen evidence of the gradual disclosure
of another aspect of reality which transcends the biological.
Mentality wells up from the spring. It appears at first in
traces only, so that we are not quite sure whether it is there
or not, just as it is not very easy to be sure whether a
calcareous Alga, or a dormant chrysalis, or a hibernating
snail is living or not. But by and by there is a copious
flow, and we have no hesitation in saying that the rook or
the parrot, the dog or the elephant, has a mind of its own.
The student of science is organically more interested in es-
tablishing the fact that the study of living things requires
concepts which are not needed in the study of the heavenly
bodies, than in a discussion of what, in principle, is meant
by Life. Similarly he is more interested in establishing the
fact that the study of animal behaviour and not in its
higher reaches only requires concepts which are not needed
in the study of the everyday functions of the body, than
in a discussion of what we mean by Mind. But we cannot
be satisfied without at least facing the old problem of the
relation between body and mind. It is in reality a meta-
physical question, but the metaphysical interpretation must
be consistent with what we know of the facts, and we shall
begin by stating what must be recognised from the bio-
logical side.

232 THE PROBLEM OF BODY AND MIND

Our theory of the relation of mind and body (if it be a
relation) must be consistent with what we know of individ-
ual development. The intelligent mammal begins its in-
dividual life as a pinhead-like cell, and for a long time it
must be admitted that psychological methods or formula}
are quite inapplicable. The developing ovum of a rabbit
(fide Brachet) can go on developing for some time outside of
the maternal body, it is a self-contained implicit organism.
We do not understand how it is managed, but it has born
with it the potentiality of the big brain and the intricate
behaviour. There is a gradual emergence of reflexes, of
tropisms, of spontaneous exertions, of experiments, of learn-
ing, of putting two and two together, of clever behaviour
and, in man, of occasional wisdom. In our own case we are
sure that as the minute structure of the cerebral cortex in-
creases in complexity, the child becomes more intelligent ;
as the child becomes more intelligent, the cerebral cortex
increases in complexity. Not a single nerve-cell is added
after birth, but the inter-relations between the cells increase
in number, and the brain becomes a labyrinth. There are
no new nerve-cells, but there is normally no lack of new ideas
in the growing boy.

(6) Our answer to the body and mind problem must be
consistent with what we know of the historical facts. In
the course of evolution the nervous system has become grad-
ually more complex and behaviour gradually more masterly,
wider in range, more fertile in resource. We do not wish to
make too much of the nervous system, for the method of
trial and error, for instance, is practised by animals with
no nervous system at all, and a very dennite capacity for
learning may be exhibited by an animal, like a starfish,
without a single ganglion in its body. But when we have

THE PROBLEM OF BODY AND MIND 233

made this admission we must advance to the other fact that
evolution of brains and evolution of behaviour have pro-
ceeded hand in hand, in intimate correlation.

(c) The theory we frame as to the mind and body relation
must be consistent with the fact of their functional inter-
dependence. We express one side of this inter-dependence
when we say, " the spirit is willing, but the flesh is weak ",
which suggests the picture of a worn-out instrument unequal
to the player's demands. We express another side of the
inter-dependence when we say of our friend that " he died
in his prime, of a broken heart, having lost interest in life ",
which suggests the picture of a strong organisation or society
crumbling away because of the resignation of one who was
its heart and soul.

A large and a complex brain among Vertebrates is cor-
related with a dominance of intelligent behaviour. The
more convolutions the greater the fulness and freedom of
life. An intricate brain among Arthropods is correlated
with subtlety of instinctive behaviour. Thus an important
part of the ant's brain is big in the worker, smaller in the
queen, and almost absent in the drone. Retardation or
warping of the development of the nervous system is as-
sociated with enfeeblement or disharmony of mental life.
Fatigue, or poisoning, or degeneration of the nervous system
has its mental correlate. Injury to particular areas of the
brain may bring about specific changes in behaviour, e.g.,
disorders of speech. It seems, for instance, that an area
at the base of the third convolution on the left side of the
brain is the seat of the impressions and processes associated
with remembrance of the movements of articulation ; that
an area affecting the first and second left temporal convolu-
tions is similarly associated with memory of the sound of

234 THE PROBLEM OF BODY AND MIND

words ; that an area at the posterior part of the second pari-
etal convolution on the left side is similarly associated with
visual images of words and letters (see Bergson's Creative
Evolution).

The senescence of the worker hive-bees after their all too
strenuous short life is correlated with observable fatigue-
changes in their brains, and the influence on the human
nervous system of degeneracy of the thyroid gland is cor-
related with the semi-idiocy of cretinism. There is no
question-begging in giving these illustrations of the way in
which our mind's activity and development are bound up
with the health and development of the body, for it is
quite open to any one to hold that the brain, for instance,
is the instrument in and through which the mind realises
its desires and ideals. " It may be held also/' an expert
psychologist writes, " that the gradual failure of powers
with old age or the temporary failure with illness or fatigue
failure which, though primarily physical, seems to reach
to the very core of the mind's being is defect not of the
player, but of the instrument on which he plays, and through
which alone his genius can find fitting expression '' (J. L. Mc-
Intyre; Hastings' Cyclopaedia, vol. x, p. 778). Our pres-
ent point is simply that, whatever be our theoretical inter-
pretation, it must do justice to the facts of correlation. For
whatever theory we adopt, these facts remain.

3. What Must Be Recognised from the Humanist Side.

In pondering over the body and mind problem we must
never lose sight of the supreme reality of i mind '. We need
not dwell on the fact that we do not know anything of Na-
ture save in the selective mirror of our minds ; it is more
important to insist on the positive reality of the thought-life,

THE PROBLEM OF BODY AND MIND 235

the most real fact in the world. There must surely be some
bungling with words when the distinguished physiologist
Prof. Jacques Loeb speaks of our existence being " based
on the play of blind forces and only a matter of chance ",
and of ourselves as " only chemical mechanisms ". Ideas are
not impalpable will-o'-the-wisps, they have hands and feet.
" My mind to me a Kingdom is," not a dispensable emana-
tion suspended tremulously over the physical, like the heat-
haze over the cornfields. The starry firmament on high
is scarce more awe-inspiring than the spiritual edifice
scientific and ethical, artistic and religious which man has
built outside himself. Neither in peace nor in war can
we ignore the larger values of the true, the beautiful, and
the good without imperilling body as well as soul. What-
ever theory we adopt about body and mind monist or dual-
ist, correlationist or interactionist, organicist or animist
these facts remain.

One of Darwin's services was to show man's solidarity
with the rest of creation, his affiliation to a mammalian

stock. That this was a very important contribution to human
thought is recognised almost unanimously, arid no one any
longer dreams that the dignity or value of a result is affected
by the historical conditions of its becoming or evolution.
Yet it seems fair to point out the risk, that focussing atten-
tion on the rock whence Man was hewn and the pit whence
he was digged, may lead to an under-estimate of the apart-
ness and uniqueness of Man as compared with the rest of
creation. He is separated off by reason or the power of
conceptual inference, by morality or the habit of control-
ling his conduct in reference to ideals, by the possession of
true language or Logos. Man was the greatest of mutations
a new synthesis; and it is certain that in him organismal

236 THE PROBLEM OF BODY AND MIND

individuality finds a new and finer expression which we
call Personality.

4. Various Theories of the Relation of f Mind ' and f Body \

To the question how we are to think of our thought-life
and our brain-life in relation to one another at least seven
answers have been given, but we need not give all of them
the same amount of attention. Two of them fall if we
conclude, as we have done, that mechanistic formulation
does not give an adequate account of the world of organisms.
These two are (I) thoroughgoing materialism, and its modern
representative, (II) epiphenomenalism. (I) According to
thoroughgoing materialism, mind is fictitious and the only
realities are matter and motion. Sensation, according to
Hobbes, is nothing but motion; and the brain, according
to Cabanis, secretes thought as the liver secretes bile. To
this it may suffice to answer that the mechanical theory of
organisms breaks down ; that we cannot satisfactorily ex-
plain our thinking in terms of laws of matter and motion
which are the results of our thinking; and that we cannot
think clearly to ourselves the proposition that mind is a
function of the brain, or that the motion of particles produces
the emotion of joy.

(II) According to Huxley's epiphenomenalism, the
stream of consciousness is like the chain of foam-bells on
the river, called into existence by the real physico-chemical
processes in the brain, and ceasing as these cease. The real
causal sequence is to be found in the neuroses which are
assumed to admit of mechanical formulation; the sequence
of psychoses is due to that of the neuroses, for the elements
of consciousness have no influence either on one another or
on the activities of the creature. The psychoses are the

THE PROBLEM OF BODY AND MIND 237

shadows cast by the vanes of the cerebral windmill, or the
creakings of the machinery, or at the best the electrical
sparks which accompany the friction. There may seem to
be two watches, but only one is going (the brain) ; when
the going watch ticks there is an echoing tick in the other;
nay more, by induction the going watch may cause move-
ments of the hands of the watch which only seems to go.
Perhaps the most generous image is, that the elements of
consciousness are the short-lived foam-bells on the wonderful
current of cerebral processes.

We cannot accept this view because it is wrapped up with
the mechanistic hypothesis, because it hands over the reins
of life to matter and motion, because it denudes the thought-
life of all reality. When biologists become preoccupied
with the psychical concomitants of blots in the brain, or
with the localisation of particular mental functions in partic-
ular areas in the cerebral cortex, they are apt to lean towards
epiphenomenalism, but this has to be corrected by trying
to see life whole.

The epiphenomenalist theory (which regards mentality as
a negligible phosphorescence of life) is to be rejected on
common-sense grounds because we are sure that in human
life consciousness and awareness of meaning count for much.
It is rejected by most biologists because they cannot evade
the conviction, we can hardly say conclusion, that mentality
is pervasive throughout all creatures that exhibit genuine
behaviour, associative memory, and profiting by experience;
and because they find it difficult to believe in the elabora-
tion and persistence of what is, on the epiphenomenalist
theory, a useless by-play, counting for nought. And if it be
asserted that the persistence and evolutionary elaboration
may be accounted for because consciousness is the inevitable

238 THE PROBLEM OF BODY AND MIND

by-product of the all-important inter-relations of nerve-cells,
then we have slipped back again into the slough of material-
ism. And it does not seem unfair to put to those who say
that thinking is only the phosphorescence of an exuberant
cerebral metabolism, the question, " What, then, must the
theory of epiphenomenalism be held to be? A will-o'-the-
wisp looking at itself ? '

Against the theory that the mind does not count let us
note the opinion of Professor Sherrington, one of the most
distinguished investigators of the nervous system. In his
important book The Integrative Action of the Nervous
System, he says : " The concomitance between certain
nervous reactions and psychosis seems an alliance that
strengthens the restless striving of the individual animal
which is the passport of its species to continuance of exist-
ence ' (p. 333). . . . "Certain it is that if we study
the process by which in ourselves this control over reflex
action is acquired by an individual, psychical factors loom
large, and more is known of them than of the purely physi-
ological 'modus operandi involved in the attainment of the
control" (p. 390).

Only in the analytic laboratory or systematic museum-
can we rest satisfied with a view of Animate Nature which
maintains that mind does not count. By sympathy if not
by science we are sure that to leave mind out is a travesty
of the facts. Especially in its higher reaches, life is suffused
with feeling and meaning.

In his Birds and Man Mr. Hudson tells of what his
brother once saw on a lonely sheep-farm on the southern
frontier of Buenos Ayres. " Immense numbers of upland
geese in great flocks used to spend the cold months on the
plains where he had his lonely hut; and one morning in

THE PROBLEM OF BODY AND MIND 239

August in the early spring of that southern country, some
days after all the flocks had taken their departure to the
south, he was out riding, and saw at a distance before him
on the plain a pair of geese. They were male and female
a white and a brown bird. Their movements attracted
his attention and he rode to them. The female was walking
steadily on in a southerly direction, while the male, greatly
excited, and calling loudly from time to time, walked at
a distance ahead, and constantly turned back to see and
call to his mate, and at intervals of a few minutes he would
rise up and fly, screaming, to a distance of some hundreds
of yards ; then finding that he had not been followed he would
return and alight at a distance of forty or fifty yards in
advance of the other bird, and begin walking on as before.
The female had one wing broken, and, unable to fly, had set
out on her long journey to the Magellanic Islands on her
feet; and her mate, though called to by that mysterious
imperative voice in his breast, yet would not forsake her;
but flying a little distance to show her the way, and return-
ing again and again, and calling to her with his wildest
and most piercing cries, urged her still to spread her wings
and fly with him to their distant home.

" And on that sad, anxious way they would journey on
to the inevitable end, when a pair or family of carrion
eagles would spy them from a great distance the two
travellers left far behind by their fellows, one flying, the
other walking; and the first would be left to continue the
journey alone " (Birds and Man. 2nd Ed., 1915, p. 214).
The realm of animal life is crowded with this sort of thing.

(Ill) Also to be rejected is subjective idealism, which
is the extreme antithesis of epiphenomenalism, and finds
nothing real but the routine of personal conscious experience.

240 THE PROBLEM OF BODY AND MIND

This amounts to a denial of the existence of the physical
world and of the possibility of science ; it is the non-pos-
sumus of solipsism.

(IV) A fourth view common as a working-hypothesis
at least goes by the name of psycho-physical parallelism.
It admits the reality of both mental and cerebral processes,
but regards them as concomitants merely, without inter-
action, two parallel causal chains, each complete in itself.
We may think of two watches tied together, keeping perfect
time, but constructed on different principles and using dif-
ferent notations. This view was subjected to what seems
to us destructive criticism in Professor Ward's first course of
Gifford Lectures on " Naturalism and Agnosticism " ; but
it is still held by some psychologists of distinction, either
simply as a convenient way of formulating the facts, or
with a metaphysical theory behind it namely, an idealistic
view of material phenomena.

Besides psycho-physical parallelism there are in the field
three possible theories. One is much favoured by philoso-
phers (V) the theory of psychical monism. Another view,
(VI) the soul-theory or animism, does not seem to be fa-
voured by many philosophers or by many scientific investiga-
tors, but may be true for all that. The remaining theory,
much favoured by biologists, is (VII) the two-aspect or iden-
tity hypothesis. It seems to us that each of these theories has
its particular advantages and its particular difficulties, and
that a decision must at present be left with the individual
according to his personal experience. In our judgment the
biological facts mostly favour the two-aspect theory, but we
have no assurance that it is the most valid.

(V) Psychical Monism. According to the doctrine of
psychical monism, conscious process is the only reality, and

THE PROBLEM OF BODY AND MIND 241

though what we call physical objects and physical processes
are also real, they owe their reality to being conscious
processes or activities in disguise. We can formulate physi-
cal processes as if they consisted of the movements of bodies,
but our formulation is purely symbolic. There are no
things that move, nor things that have potential energy,
there are no individualities outside the conscious stream.
Things vanish away; things in themselves are regarded as
mental in their nature. Needless to say, students of science
are rarely attracted to this view. But it is to be suspected
that the provocation to antipathy is in part due to confusing
metaphysical and scientific language.

(VI) Animism. Of all the theories of the psycho-phys-
ical relation the oldest and perhaps the most attractive is
animism, the soul-theory. In its clearest form it maintains
the actuality of the soul as an embodied psychical being,
which realises itself in interaction with the bodily organism.
The soul is, apart from the bodily organisation, the ground
of the unity of consciousness; it makes sensation, meaning,
endeavour, and guidance possible. Its relation with the
body is reciprocal, for while it controls the body, the bodily
processes supply to it the content of consciousness. Inter-
acting with the body, it develops into the centre of personal-
ity. It may conceivably attain to an existence independent
of the life of its partner.

On Bergson's view, the brain is the medium between
consciousness and the external conditions of life ; it is " the
organ of attention to life ", keeping the mind in contact with
reality. But thought, he maintains, is in great part in-
dependent of the brain, and " there is infinitely more in
a human consciousness than in the corresponding brain ".
If the mental life thus transcends the cerebral life, if the

242 THE PROBLEM OF BODY AND MIND

brain serves simply to translate a small part of what goes
on in mind, then personality is not permanently tethered
to protoplasm.

The animist need not occupy the extreme position that
the body is but an instrument on which the mind plays.
Wiser and truer is the view that through the body the mind
is educated, disciplined, and enriched. As Aliotta puts it,
" The body is not something with which the mind can dis-
pense, it is not the forbidding prison which the Platonists
depicted in such gloomy colours, it is no torture-chamber in
which mind is doomed to expiate some mysterious crime,
but rather the fertile soil in which alone the plant of spirit-
uality can develop and blossom."

Among the advantages of animism we recognise (1) its
emphasis on the supremacy and efficiency of what we call
mind or spirit; (2) that it nevertheless faces the fundamen-
tal and all-pervading fact of body; (3) that its idea of inter-
action or reciprocal influence, though perhaps inconceivable,
is a good working hypothesis, fitting many familiar facts;
and (4) that it is congruent with that attractive and opti-
mistic view of the world which assures us of the conserva-
tion of values. A spirited and scholarly defence of Animism
has been furnished by Dr. W. MacDougall in his book on
Body and Mind.

Difficulties in the Way of Animism. All the statements
that have been proposed of the body and mind puzzle have
their particular difficulties, and they are not awanting in
the case of animism.

(&) The whole trend of science is to emphasise the influ-
ence of the bodily life on the thought-life, and although we
are told that this only means that the soul cannot realise
itself except in co-operating with its partner the body, we

THE PROBLEM OF BODY AND MIND 243

are haunted by the knowledge that particular defects in the
instrument are terribly perturbing to the player.

(&) The experiences of mathematicians and other thinkers
at a high level lead us to attach considerable importance to
unconscious cerebration, to actual achievements on the part
of the personality when the partner whose task is with think-
ing appears to be in abeyance.

(c) The characteristic feature of the animalistic theory is
the idea of interaction, and this raises several serious diffi-
culties. For how can the mind act on metabolism or metab-
olism on the mind ? How can there be interaction between
two disparate series? As Professor Stout (Manual of Psy-
chology, Chap. III.) puts it, " When we come to the direct
connection between a nervous process, and a correlated con-
scious process, we find a complete solution of continuity.
The two processes have no common factor. Their connection
lies entirely outside of our total knowledge of physical na-
ture on the one hand, and of conscious process on the other."
It has been answered that the force of this difficulty is in
the assumption that the two series are absolutely disparate,
an assumption which the undeniable correspondence between
the two series disproves. To positive vitalists there is no
particular difficulty, for the non-material psychoid or entele-
chy which directs brain-processes will be readily susceptible
to the influence of the mind ; but this is a purely verbal
relief, since it leaves us in face of the difficulty of the psy-
choid's or entelechy's capacity of acting on metabolism. We
have admitted the difficulty of explaining what is meant by
the " two-aspect theory ' or " the double-faced unity ", but
we are not sure that the idea of interaction is any more
intelligible. We suggest, however, to those who uphold the
idea, that the difficulty will appear less if it be recognised

244 THE PROBLEM OF BODY AND MIND

that the vital activities of the organism, considered apart
from its psychical activities, are not susceptible of satisfac-
tory mechanical description. When we have abandoned a
mechanistic view of the organism, we have made a step of
importance towards understanding what Professor Ward calls
the internal or inter-subjective relation that the subject bears
to its organism.

It is often said that animism involves a breach with the
principle of the conservation of energy. If mind really
counts, it is argued, work is done which the antecedent
energy-conditions do not fully account for. If the mind acts
on the brain in a way that tells, then some energy disappears
from the books, for the mind is outside the sphere of energy-
transformations. But to suppose that the mind acts on the
material system without expending energy is, the critics of
animism continue, to forsake scientific procedure, for the
law of the conservation of energy cannot be broken.

Now we are not concerned in the defence of animism,
hut this criticism is not one that commends itself to us.
The doctrine of the conservation of energy includes two
propositions. In the first place, it suggests that the total
amount of energy in the universe is a constant, but this is
rather a pious opinion than an established fact. The less
we say regarding the universality of the conservation of
energy the better, for we do not know. But in the second
place it is a regulative principle, based on experimental
evidence, which states that in any closed physical system
at work the energy expended in one way must be gained in
another. The organism and its environment are comparable
to the change-office outside an exhibition ; there are ceaseless
transformations, but the amount of cash is not only the same
in the evening as in the morning, it is the same all through

THE PROBLEM OF BODY AND MIND 245

the day. The question is whether, with this regulative
principle in view, we can think of mind acting on body or
of body acting on rnind ?

Various answers have been given, and we shall take the
worst first. (1) It has been suggested that some physical
energy may rise into mental energy and some mental energy
may sink into physical energy. But mental energy is a
mere metaphor. On this theory it is supposed that, if the
physical energy is locally augmented by the influence of
mind, e.g., of a strong will, a corresponding amount of phys-
ical energy in another part of the system disappears, say
in engendering a feeling of self-approbation. When the
resources of the change-office till are augmented by a remark-
able operation in receiving cash they are automatically re-
duced to a corresponding amount by a remarkable operation
in disbursing the same. This seems more like art than
science and the preservation of the balance savours of the
miraculous.

(2) We have already referred to Professor Poynting's sug-
gestion that the will may act as a guiding power changing
the direction of motion of the atoms and molecules of tho
brain, and that the amount of energy will not be changed,
since a deflecting force does no work. " But the interposi-
tion of the guiding power does affect the transformation of
energy; instead of the clash which the physicist would fore-
tell there would be a new configuration as the molecules
glided past each other in their new directions." This is an
interesting position, but the difficulty of thinking of mind
shunting material particles is surely hardly less than the dif-
ficulty of materialism that brain-motion causes consciousness.
It is almost certain that this attempt to square animism
and the doctrine of the conservation of energy is on quite

246 THE PROBLEM OF BODY AND MIND

the wrong line, for it pictures the mind acting mechanically
on matter in motion. But if the mind can thus determine
the direction of physical processes, say in the brain, the
disparateness of mind and body is surely given up. Even
Lotze spoke of " elements of mental life, intervening between
the operation of the corporeal organs, and filling gaps be-
tween the single links of the chain of vital processes ", but
can we think of mind producing an impact or causing mo-
tion ? What we call mind bulks largely in Animate Nature,
but surely whatever be its mode of operation it is not that
of a shunter. W. K. Clifford compared the belief in this
kind of psychical influence upon material things to the
belief that the wagons of a railway train are held together
by the friendly feeling of the engine-driver for the guard.

(3) The animist is probably on firmer ground when he
simply refuses to be tyrannised over by the principle of the
conservation of energy. That principle was established in
reference to inorganic systems which can be adequately
summed up in dynamical terms, belonging to a domain with-
out spontaneity or alternatives or endeavour. We need not
allow a law of our own making to dogmatise as to what is
possible or impossible in systems run on different lines.
No doubt the life of the organism conforms on the whole
to the principle of the conservation of energy, as calorimeter
experiments prove; perhaps it corresponds absolutely; but
what we are concerned to maintain is, that there is no reason
grounded in the constitution of nature why a living material
system should entirely correspond as regards energetics to a
non-living material system.

In this connection it should also be noticed that just as
a spark may cause an explosion, and cutting a tape may
launch a liner, an emotion may intervene to considerable

THE PROBLEM OF BODY AND MIND 247

purpose in bodily affairs without it being possible to prove
by calorimetric methods whether its interaction is accom-
panied by expenditure of energy or not.

It need hardly be said that the view of the soul as some-
thing extended in space is not the genuine animism, no
matter how subtle that ' something ' may be. Mr. Nor-
man Pearson (1916) works with a soul which " has no re-
semblance to the ponderable matter of our senses . . .
is finer even than the imponderable ether of our inference
. . . is, in fact, the nearest conceivable approach to
spirit." This may be a legitimate hypothesis, for one can-
not dogmatically assert that the extended in space is ex-
hausted by ordinary physical methods, but it is not pure
animism.

(VII) The Two-Aspect Theory. There remains a view
to which biological facts incline us, ' the two-aspect theory ',
or the ' Identity Hypothesis ', or the i correlation theory '.
We think of the organism as one, as, while it lives, an in-
dissoluble psycho-physical being. The mind and the body
are both abstractions, very convenient for purposes of dis-
course; there is but one realitv, the life of the organism,
which has a subjective aspect known as psychosis and an
objective aspect known as neurosis. The living creature
gives an account of itself in two ways. It can know itself
as something extended and intricately built up, burning
away, moving, throbbing; it can also know itself as the seat
of sensations, perceptions, feelings, wishes, thoughts. But
there is not one process, thinking, and another process, cere-
bral metabolism; there is a psycho-physical life a reality
which we know under two aspects. This view may be as-
sociated with the names of Aristotle, Spinoza, Fechner, Eb-
binghaus, Lloyd Morgan. Cerebral control and mental

248 THE PROBLEM OF BODY AND MIND

activity are, on this view, different aspects of one natural
occurrence. What we have to do with is the unified life
of a psycho-physical being, a body-mind or mind-body.

The advantages of the two-aspect theory, if it is tenable,
are (1) that it does justice to the extraordinarily intimate
inter-dependence of what we call ' mental processes ' and
' brain-processes '. It regards them as two equally real
aspects of the continuous life of the organism. There is
not merely a material watch with a ticking which we call
consciousness; there is not merely a thought-life with an
illusion of associated things ; there are not two watches
which keep time without interacting, nor yet two watches
which interact; there is one watch with two sides, which
we call objective and subjective. The objective side is the
body as a living whole; the subjective side in Man's case
is the unity of mind. (2) The psycho-physical being is one,
but its two aspects are not always equally clear to us. In
thinking out a mathematical problem we may be quite un-
aware of anything but our thought-experiments, yet the
evidence points to the possibility of these being continued
by us (by the organism) without any conscious endeavour.
In the application of an anaesthetic, one level after another
of the conscious life is obliterated in precise relation to the
degree of chloroforming, till by and by complete uncon-
sciousness may result. It looks as if the uninterrupted
life of the instrument kept the player in being, it looks as
if the life were one. (3) It is extremely difficult to think
of the mind in the ante-natal period ; it is less difficult to
think of a psycho-physical being, in whose one-cell phase
the psychical aspect is as non-explicit as it is in the adult
life during deep anesthesia. (4) It is easier to think of
evolution on this double-aspect view, for what has come

THE PROBLEM OF BODY AND MIND 249

about has always been simultaneous progress in the expres-
sion of both aspects more intricate bodies with their
counterpart in subtler behaviour, a growing mentality and
its counterpart in a more complex brain-life.

Objections to the Two-Aspect Theory. (1) It has been ob-
jected that the phrase " two aspects of the same process " is
unmeaning when forced upon the psycho-physical relation,
where we have to deal with sequences of radically different
orders, " apprehended in two radically different ways, the
one by sense-perception, the other by reflective introspection ".
Fechner spoke of the view of a sphere from the inside and
from the outside being two aspects of the same thing, but
in that case the one gives us the other, whereas we cannot
in the least degree deduce the nature of the psychical from
an observation of the physical, or contrariwise. But this
objection states a false case, for the postulate of the identity
hypotheses is that there never are two events, but always
only one. We must not think of two disparate series, one
teleological, implying a purposive selective unity, and the
other mechanical, due to the refined and complicated or-
ganisation of the nervous system ; we must think of one
series fundamentally purposive and in its higher reaches
consciously purposeful. As Bain put it, " The line of
causal sequence is not mind causing body, and body causing
mind, but mind-body giving birth to mind-body." From a
very different starting-point Samuel Butler said almost the
same thing: " The idea of a soul, or of that unknown
something for which the word * soul 7 is our hieroglyphic,
and the idea of living organism unite so spontaneously, and
stick together so inseparably, that no matter how often we
sunder them they will elude our vigilance and come together,
like true lovers, in spite of us."

250 THE PROBLEM OF BODY AND MIND

(2) It is also objected to the identity hypothesis that
there is lacking, except in the case of the introspecting psy-
chologist, any observer occupying the inner-standpoint.
But it is not in the least necessary to the theory that there
should be any continuous observation of the subjective as-
pect. In ordinary daily life there is introspection only at
intervals, when this miraculous power of self-awareness has
a definite role to play. In animal life there is, of course,
no demonstrable self-consciousness, but there is a mental life
which cannot be interpreted in terms of the abstractions of
the physiology of the nervous system. According to the
identity hypothesis this mental life is one aspect, hypotheti-
cally imagined by us, of the very highest reach of the
organism's activity.

(3) It is objected that the two-aspect theory simply in-
vents and glorifies an X, an unknown and unknowable en-
tity. To make clearer what we do in some measure know,
it postulates an indefinable reality of which we can know
nothing. " The one substance," says Professor Stumpf,
" which is supposed to manifest itself in the two attributes,
the physical and the psychical, is nothing but a word which
expresses the desire to escape from dualism, but which does
not really bridge the gulf for onr understanding." But
the charge " nothing but a word ' is readily made and as
readily recoils. The identity hypothesis does not pretend
that we know anything like all about that fraction of reality
which we call a living creature, nor that we can explain
its having two aspects. It maintains, however, that we know
this about organisms, that they are agents that do things,
unique individualities that express themselves in endeavour,
psycho-physical beings that burn away and yet remember,
that ripen and rot and yet work towards ends which transcend

THE PROBLEM OF BODY AND MIND 251

themselves. What the ' identity hypothesis ' or correlation
theory postulates is not an unknown X, but an imperfectly
known organism, whose pre-awareness of meaning is as real
as its flesh-and-blood metabolism, yet inseparable from it.

(4) Another objection to the ' double-aspect ' interpreta-
tion is that we know ourselves as self-determining for no
one can get away from an immediate awareness of his per-
sonal agency whereas the organism is determined from
without, being part of the mechanical system of things. Can
the same reality be determined from without and self-de-
termining? But the objection must be disallowed, first be-
cause the organism has spontaneity, from the Amoeba up-
wards, and is certainly not wholly determined from without ;
and, second, because when we examine ourselves carefully
we find that our mental life is not wholly self-determined.
It is an unnecessary difficulty to say that one aspect is
teleological and the other mechanical ; for we have given
good reasons for believing that the organism is more than
mechanical. i Body ' and ' mind ' are both of the teleological
or purposive type, for that is the nature of the creature from
first to last.

5. Monistic Speculation along the Line of the Double-
Aspect or Correlation Theory.

On the Double-Aspect or Identity Hypothesis all animals
are psycho-physical beings, and this is borne out by what is
known of the behaviour of the very simplest, for we see
Amoebae going ahunting and Foraminifera working like
selective artificers. But what of the plant world ? Logically,
we can make no halt, and there are curious phenomena which
approach behaviour in carnivorous plants and climbing
plants. In some cases, there is what looks like memory.

252 THE PROBLEM OF BODY AND MIND

But the continuity argument presses us further. Since it
seems very likely that organisms arose upon this earth from
not-living materials, in a manner at present obscure, are we
to suppose that consciousness somehow entered ab extra into
the early organisms when they were as yet only beginning;
or that it was interpolated later when they attained to some
degree of complexity; or that the analogue of consciousness,
which some have called infra-consciousness, was present even
in the domain of the inorganic ? The desire for continuity
impels us to the speculation that even the inorganic raw
materials were psycho-physical. For in no case can we
think of consciousness arising out of motion, any more than
we can think of atoms uniting for love.

There has been great progress in the course of evolution,
but on the identity hypothesis we think rather of potencies
being raised to higher powers than of the interpolation of
new faculties. Instead of insinuating a principle of life
ab extra when a suitable mixture of proteins had been some-
how synthesised, we suppose that a synthetic advance of
materials, which were ever more than motions, made be-
haviour possible. Instead of insinuating mind ab extra
when the organism became complex enough, we suppose that
the progressive differentiation and integration of what was
from the outset a psycho-physical being, by and by disclosed
another aspect of its inherent reality, and experimenting
with ideas became possible. And similarly with man's
rational discourse and with the amazing phenomena of
human society.

Biological monism has been characterised as a relapse to
the old and crude metaphysics of hylozoism. Perhaps it is
nearer the hylopsychism of some of the New Realists. " By
hylopsychism I mean the theory that The potentiality

THE PROBLEM OF BODY AND MIND 253

of the physical is the actuality of the psychical and the
potentiality of the psychical is the actuality of the physical.
Or, to put it in the form of a definition of consciousness :
Consciousness is the potential or implicative presence of a
thing at a space or time in which that thing is not actually
present . . ." (W. P. Montague, p. 281). " By hylopsychism
I wish to denote the theory that all matter is instinct with
something of the cognitive function ; that every objective
event has that self-transcending implication of other events
which when it occurs on the scale that it does in our brain
processes we call consciousness' (p. 283).

Is there any difference between this and the monistic spec-
ulation of Prof. Lloyd Morgan ? " Of simple awareness
there can be no evidence by acquaintance, save in being aware.
And since we cannot be an Amreba or an isolated neurone,
an oak or an acorn, an attracting magnet or a shred of iron
attracted thereto, we can never directly know whether in
them some dim awareness is present or absent. None the
less we may be permitted to suppose that awareness, as a
specific mode of relation between terms, is ubiquitous
throughout nature basing this supposal on the principle
of continuity. If here in us in high measure, then in the
oak and the acorn, in the molecule and the atom, in their
several measures and degrees' (1915, p. 10).

To demand of the biologist an explanation of the double
aspect of the psycho-physical being is to demand the im-
possible. Organisms are unique facts; intelligent organisms
are unique facts. But if the biologist is pressed hard and
asked if there is no other unique fact beside which he can
place his double-aspect organism, perhaps he may answer,
" Why, there is only thought itself, which is subjective and
objective at once,"

254 THE PROBLEM OF BODY AND MIND

The t Body and Mind 5 problem has served to stretch
man's brains for more than two thousand years, and there
are many who would abandon it with the word * Ignorabi-
mus '. But Man will never leave it alone, and the resolute
endeavour after greater clearness is likely to bring its own
reward even if the riddle remain unread. For the inquiry
patiently prosecuted is likely to lead to a deeper appreciation
of what we call ' Body ' and of what we call ' Mind '. And
this deeper appreciation is the practically important result.

SUMMARY.

The approach to the difficult problem of the relation between
' body ' and ' mind ' has been cleared (a) by the argument that
mechanical formulation is inadequate for the description of vital
activities, and (b) by the recognition of the pervasive role of
' mentality ' in Animate Nature.

In any consideration of the problem there must be borne in mind,
from the biological side, how gradually mind develops in the in-
dividual, how gradually mind has evolved in the races of animals,
and how intimately inter-dependent the psychical and neural pro-
cesses are. Whatever theory is adopted, these facts remain.

In any consideration of the problem there must be borne in mind,
from the humanist side, the reality of the thought-life, the reality
of the external spiritual not-self which man has in the course
of ages built up, and the potency of spiritual values in history and in
everyday life. Whatever theory is adopted, these facts remain.

The question is how we are to think of our thought-life and of
our brain-life in relation to one another, for we can at any rate
talk of them as distinct actualities. At least seven answers have
been given to this question. Two of these are only acceptable on
the mechanistic hypothesis, namely (I) the throughgoing material-
istic answer and (II) the theory of epiphenomenalism. The theory
at the very opposite extreme subjective idealism (III) seems to
deny the possibility of science. The theory of psycho-physical
parallelism (IV) lands in apparently inextricable difficulties so
well exposed by Prof. James Ward. There remain in the field three
possible theories: (V) the theory of psychical monism, which few

THE PROBLEM OF BODY AND MIND 255

scientific investigators can entertain; (VI) the theory of animism
or the soul-theory; and (VII) the identity hypothesis, or two-aspect
theory, or correlation theory.

A case can be reasonably stated for the theory of psychical
monism, for the soul-theory, and for the two-aspect theory, and a
decision must be left with the individual according to his personal
experience. Each theory has its own advantages and its own dif-
ficulties. When the biological facts are dominant in the mind the
balance will swing towards the ' two-aspect theory ' or * identity
hypothesis/ which regards the living creature as a psycho-physical
unity, psychosis and neurosis being two aspects of one and the
same continuous life.

Perhaps, as in the case of vitalism, the most consistent scientific
position is to keep firmly to the fact that just as the everyday
functions of the organism, not to speak of its development, hered-
ity, and evolution, cannot be adequately described in terms of
chemico-physical concepts, so it appears that many of the forms of
behaviour cannot be adequately described in terms of the concepts
of biology. A new aspect of reality is expressed requiring new
categories psychological categories. This is but a pedantic way
of expressing what was said of old: "Surely the life is more
than food."

LECTURE VIII.
THE FACT OF BEAUTY.

LECTUEE VIII.
THE FACT OF BEAUTY.

1. A Synoptic View of Animate Nature Must Include the Fact
of the Pervasiveness of Beauty. 2. General Characteristics
of the Esthetic Emotion. 3. Beauty a General Quality of
Animate Nature. 4. Theoretical Objections to the Thesis.
5. Concrete Objections. 6. Factors in ^Esthetic Delight.
7. Aspects of Beauty in Animate Nature. 8. Biological
Significance of Beauty to the Beautiful Organisms themselves.
9. Beauty of Animal Artifice. 10. Evolution of ^Esthetic
Emotion. 11. The Significance of the Pervasive Beauty of
Animate Nature.

1. A Synoptic View of Animate Nature Must Include
the Fact of the Pervasiveness of Beauty.

IN an inquiry into the significance of Animate Nature,
there is no getting past the fact of Beauty. Whatever we
make of it, the Beauty of Nature is a joy for ever to many,
not only to the cultured, but to the unsophisticated who
never heard of the aesthetic attitude. Man's contemplative
and disinterested delight in the beautiful is well-nigh the
best of him; and it is a reasonable and verified belief that
we get at something in this way which can be reached by
no other, certainly not by scientific analysis or by logic.
There are curiously few general affirmations that we can
make about Nature; one is that Nature is in great part
intelligible or rationalisable, and another is that Nature
is in greater part beautiful.

It is our object in these lectures to indicate what contri-

259

260 THE FACT OF BEAUTY

butions Biological Science has to offer to a general view
of the world, and it is impossible for biologists to pass over
the pervasiveness of beauty in the realm of organisms. We
cannot say that science is required to discover this beauty
in its obvious expressions in bird and flower, but its luxuri-
ance in the unobtrusive, in the well-concealed, in internal
and microscopic structure, and among the unicellulars cannot
be discerned without scientific investigation. If the popular
impression be that beauty is the exception, the scientific im-
pression is that beauty is the rule. For a long time, perhaps
till the middle of the 19th century, Beauty was very gen-
erally spoken of as a quality of the exotic the orchid and
the Bird of Paradise now we feel it most at our doors. St.
Peter's lesson has been learned, for we find nought common
on the earth. As one of the poets says, " Beauty crowds us
all our life." Moreover, sound science tells us much that is
very interesting regarding the beautiful and intensifies our
appreciation of its significance.

2. General Characteristics of the Esthetic Emotion.

We mean by the beautiful that which excites in us the
particular kind of emotion which we call aesthetic. This is
experienced in many degrees of intensity and of purity, but
it is distinctive. The aesthetic emotion is not excited by
touch, taste, or smell. The aesthetic emotion is an end in
itself, like intellectual contemplation, though it may liberate
Man's formative impulse. It grips us as organisms, l body
and soul ' at once, and abides with us incarnate. The thing
of beauty is a joy for ever. Prof. B. Bosanquet points out
(1915) that aesthetic feeling has qualities of permanence, rel-
evance, and community. That is to say, it brings no satiety;
it is annexed to particular qualities not a feeling of general

THE FACT OF BEAUTY 261

well-being; and it grows as we share it with others. In all
but its simplest expressions, it strikes the chords of imagina-
tion, for, as Professor Bosanquet insists, " the aesthetic atti-
tude is an attitude in which we imaginatively contemplate an
object, being able in that way to live in it as an embodiment
of our feeling. . . . The esthetic attitude so far as enjoy-
able ? is " the pleasant awareness of a feeling embodied in
an appearance presented to imagination or imaginative
perception."

3. Beauty a General Quality of Animate Nature.

Now, what seems to us to be a fact, and a very interesting
fact, is that all natural, free-living, fully-formed, healthy
living creatures, which we can contemplate without preju-
dice, are in their appropriate surroundings artistic har-
monies, having that quality which we call beauty. That is
to say they have qualities objective qualities which excite
in us a particular kind of emotion, often of a very high
order. To many of us of the eye-minded type the blotting
out of the annual pageant, say of flowers and of birds, would
be the extinguishing of one of the lights of life. But we
must pause to inquire whether our proposition really ex-
presses a fact.

4. Theoretical Objections to the Thesis.

The first objection is, that beauty is in no sense a quality
of things, but is wholly in our minds purely subjective.
Hegel, forgetful of Schelling and Goethe, remarked that
it had never occurred to any one to emphasise the aspect
of beauty in natural things, that in fact the beauty was not
in the things but in the contemplating mind. Some other
philosophers, such as Vaihinger, the author of The Philos-

262 THE FACT OF BEAUTY

ophy of the As If, have maintained that the Beautiful is
one of Man's self-preservative * fictions ' -whistlings to keep
his courage up. But this is an extreme of subjectivism. No
doubt the aesthetic emotion implies a racially and individu-
ally attuned mind, but this is not thrilled except in the pres-
ence of compositions of lines and combinations of colours
which have a particular quality. There are other compo-
sitions and combinations usually of our own making
which fail to please us, which have not the quality. Except
in reminiscence, we do not have the aesthetic joy unless the
thing of beauty is there, and in regard to animate objects
there is remarkable congruence of emotion on the part of
the observers, after certain readily intelligible difficulties
have been overcome. Moreover, as a domesticated animal
or cultivated plant degenerates under artificial conditions,
becoming obese, or coarse, or scraggy, as the case may be,
there is a correlated slackening in our pleasure in it. There
is an objective basis of ugliness correlated with our subjective
repulsion.

And again, it cannot be a mental fiction, this aesthetic de-
light, for if there is any corner of experience where the
unity of body and mind is more forcibly illustrated than
elsewhere, it is in connection with the aesthetic emotion. It
is a body-and-mind reaction. " If we try/' says Professor
Bosanquet (1915), " to cut out the bodily side of our world,
we shall find that we have reduced the mental side to a mere
nothing."

Speaking of " the aspects of beauty and sublimity which
we recognise in Nature, and the finer spirit of sense revealed
by the insight of the poet and the artist ", Professor Pringle-
Pattison writes : " These things also are not subjective imag-
inings ; they give us a deeper truth than ordinary vision,

THE FACT OF BEAUTY 263

just as the more developed eye or ear carries us farther into
Nature's refinements and beauties " (1917, p. 127). " Phi-
losophy does not require us, then, to treat the beauty and
sublimity of natural objects as subjective emotions in the
bystander: we are entitled, on the principles I have been
advocating, to treat them as qualities of the object just as
much as the vaunted primary qualities' ... (p. 129).
" Things are as they reveal themselves in their fullness to
the knowing mind ' (p. 130).

It is highly probable that our likes and dislikes, our
standards and criteria, have been to some extent wrought
out in the course of ages of familiarity with Nature. It is
highly probable that certain arrangements of lines and colours
please us greatly because of racial and even pre-human asso-
ciations, for we are strange medleys of organic memories.
But no one can say that he knows much about this. There
are some cases of apparent aesthetic delight among animals,
e.g., that of the Bower-birds which decorate their honey-
moon bower with brightly coloured objects, apparently pro-
ductive of pleasant excitement. But we do not wish to
make much of the rather problematical aesthetic predisposi-
tions inherited from pre-human ancestry, especially since
whatever was thus entailed had to pass muster with Man
himself, had to be assimilated or eliminated, approved or
rejected by an evolving rational being. Allowing something
for hereditary associations, we have to face the fact that
man has a great pleasure in the lines and colours of, say,
flowers and birds; and our point is that these are not ' any-
how ' lines and colours, but have a positive quality.

It is worth noting (1) that many quite unfamiliar living
creatures such as deep-sea animals are recognised at first
glance as triumphantly beautiful; (2) that it is among the

264 THE FACT OF BEAUTY

domesticated and the cultivated, in favour of which man
should be prejudiced, that we find the best examples of the
ugly; and (3) that for many people the most beautiful
things that is to say, the things which evoke the keenest
aesthetic delight are not natural objects, but queer creations
which bear no resemblance to anything in the heavens above,
or in the earth beneath, or even in the waters under the
earth where strange beings abound. Yet the beautiful thing
a decoration, a piece of pottery, a tile thrills us through
and through, and we never tire of it.

Another objection is based on the capriciousness of taste.
In his well-known Komanes Lecture on " Criticism and
Beauty ", Mr. Arthur J. Balfour laid emphasis on the con-
spicuous absence of common agreement as to what is beauti-
ful. There is no accepted body of aesthetic doctrine. Taste
differs with race, age, and degree of culture. Greece had
apparently in ancient days values very different from ours
as to music, and in pictorial art what is one man's food is
another man's poison. Even among the aristocracy of taste,
what agreement is there among the various schools and
critics ? Mr. Balfour maintains that there is no standard
of the beautiful to be found (a) by critical analysis, or
(&) in the consensus of experts, or (c) in the general suffrage
of pleased mankind. So he concludes that just as that is
for every man most lovable which he most dearly loves, so
that is for every man most beautiful which he most deeply
admires.

Perhaps we may evade the force of this argument by
remembering that Mr. Balfour was discussing art, while
our theme is Nature, which makes a great difference. More-
over, while there is discrepancy of view among experts as
regards the merits of subtle expressions of art, there is usu-

THE FACT OF BEAUTY 265

ally agreement in appreciating straightforward aesthetic ex-
cellence and in rejecting the ugly.

In maintaining the objectivity of beauty we recognise to
the full the subjective side, namely the assthetic emotion,
which is complex, not simple. The emotion is the subjective
side, and, as every one knows, very personal, varying with
age, health, state of mind, past experiences, and so forth:
but certain qualities of form, colour, and movement in the
objects of contemplation are objective and do not in any
way depend on us. Against this position it does not seem
particularly cogent to urge that the uneducated may see
no beauty in a grass; that the sick man may find his old
favourites intrusive and repugnant; that an analysis of our
delight in the beautiful reveals subtle associations and self-
projections. For it must be remembered that all sensory
alertness demands discipline; that there is, so to speak, easy
beauty and difficult beauty the latter often mistaken by
the careless for ugliness; that health in subject and in ani-
mate object is the normal state with which we have primarily
to reckon ; and that a pleasedness directly induced by certain
qualities of things may be enhanced and overwhelmed by
secondary factors due much more to the world within than
to the world without.

5. Concrete Objections.

But there is another series of objections, perhaps to the
scientific mind more interesting. These consist in bringing
forward evidence that the realm of organisms is spotted with
ugliness. To meet these objections let us briefly explain the
saving-clauses attached to our thesis.

(1) There are some creatures which the average man
cannot contemplate without prejudice. He does not admire

266 THE FACT OF BEAUTY

the jellyfish, beyond doubt a decorative masterpiece, because
he was once stung; he cannot abide the handsome newt be-
cause of its clammy skin ; he does not appreciate the snake's
beauty because of the Garden of Eden. There is no use
trying to get a fair verdict from a packed jury. In testing
our thesis we must exclude cases where our impressions are
more or less excusably warped by some unpleasant associa-
tion by something which is often at least quite extrinsic
to the creature. It is difficult, even for a naturalist, to judge
impartially of the artistic merits of parasites, though in
some cases, like dodder and mistletoe, the beauty is too
strong for our prejudice. In support of the view that Nature
is spotted with ugliness, Prof. James Ward refers to crea-
tures like the spinose lizard which has been called Moloch
horridus. But his examples are unfortunate. They are
animals in regard to which a prejudiced association might
readily arise ; but they are delightful quaint creatures over
which the artist is enthusiastic.

The other saving-clauses are slightly different. To get
a clear issue we must exclude domesticated animals such as
prize pigs, and cultivated plants such as the buxom cabbage,
which are non-viable in a state of nature, and bear too ob-
viously the marks of man's fingers. We may exclude also
unfinished or embryonic stages, which are often, as a matter
of fact, hidden away very carefully in Nature. We may ex-
clude also all captive creatures which are distorted or crippled
by parasites or by disease, and all the monsters of the terato-
logical show which Nature would not have tolerated for a mo-
ment. These are ugly, and we shall see, later on, that there
are several objective reasons for their being repulsive to us.
Our thesis refers to wholesome wild nature.

Another saving-clause is significant. If we are to appraise

THE FACT OF BEAUTY 267

rightly we must see the creature in its native haunts, in
the environment to which it is adapted, which is in a sense
its external heritage, which it has in some cases sought out.
The hippopotamus at the Zoo may fail to excite aesthetic
emotion, but that this is our misfortune and not Behemoth's
fault is evident from the book of Job. We have to see him
as the author of that poem saw him, with his ruddy hide
in the shade of the lotuses, in the covert of the reeds and fens.
" His strength is in his loins, his force in the sinews of
his belly, the muscles of his thighs are knit together, his
bones are pipes of brass, his limbs are like bars of iron, he
is the chief of the ways of God." And we, purblind, call
the hippopotamus an ugly creature!

This is a subtle subject which we venture to discuss
the pervasiveness of a certain quality in living things and
in the inorganic domain as well that makes life to the rela-
tively unfettered a continuous delight. So we must be par-
doned if we treat it gently, rather than with stern analysis.
The science of assthetics has not gone far yet, and we are
not desirous of doing much more than pleading that our
synoptic view of Nature must include a frank recognition
of the fact of beauty.

6. Factors in Esthetic Delight.

What is implied in our aesthetic emotion when we watch
beautiful animals the Shetland ponies racing in the field,
the kingfisher darting up the stream like an arrow made of
a piece of rainbow, the mayflies rising in a living cloud
from a quiet stretch of the river, or the sea-anemones nestling
like flowers in the niches of the shore-pool ? What is implied
in our thrill at finding in a corner of the rocks near the
waterfall a stately Royal Fern

268 THE FACT OF BEAUTY

" Plant lovelier in its own recess
Than Grecian naiad seen at earliest dawn
Tending her font, or Lady of the lake
Sole sitting by the shores of old romance."

In the first place, our enjoyment has a sensory or physi-
ological factor. What we see sets up agreeable rhythmic
processes in our eyes, and agreeable rhythmic messages
waves of chemical reaction if you will pass to our brain,
and the good news the pleasedness is echoed throughout
the body, in the pulse, for instance, and the beating of the
heart. Wordsworth was a better physiologist than he knew
when he said, " my heart leaps up when I behold a rainbow
in the sky ", or again, " And then my heart with pleasure
fills, and dances with the daffodils ". As with music, so
with beautiful sights external rhythms are often echoed
in internal rhythms, and rhythms are pleasant. It is easy
enough to burlesque the idea of the physiological factor in
aesthetic delight, but the sensory thrill is always there, and
in simple cases, where perception is not wide awake, it may
be predominant. We cannot enter into the difficult question
of the precise relation of the bodily resonance to the aesthetic
emotion, in connection with which three views have been
held. They are thus stated by Sherrington: (a) that emo-
tion is first aroused and that its nervous correlate excites
bodily resonance; (&) that the stimulus excites the mind
and the nervous centres for visceral resonance concurrently ;
and (c) that the stimulus acts on centres ruling the viscera,
and that the visceral sensations, laden with affective quality,
induce the emotion. We adhere to Sherrington's conclusion,
that the visceral resonance is secondary to the cerebral ex-
citement and the associated emotion, that it reinforces rather
than initiates the joy.

THE FACT OF BEAUTY 269

The second factor in our aesthetic delight is perceptual.
The l form ' (in the widest sense) of what we contemplate
is significant for us and satisfies our feeling. Beauty in-
creases with significance of form, with the degree in which
meaning is suffused into material, or with the degree in
which the way is opened to us to give imaginative interpre-
tation. The aesthetic attitude, Professor Bosanquet says, " is
an attitude in which we imaginatively contemplate an object,
being able in that way to live in it as an embodiment of
our feeling ". We actively respond to what we enjoy looking
at, projecting ourselves into it, reading ourselves or some-
thing else into it, in an aesthetic illusion, which has some-
thing in common with make-believe forms of play, just as
these in turn are linked on to art. It is because of the im-
portance of this factor that many have been led to the idea,
which seems to us mistaken, that the quality of beauty is
altogether subjective.

If the beautiful form which moves us is truly excellent,
it becomes more significant in all its details, in proportion
to the intensity of our aesthetic contemplation. The form
lends itself to more and more meaning. The imagination
receives a succession of liberating stimuli, one after the
other, according to the depth of the beauty of the object;
and the fact which seems to us to be outstanding is that
the lines and patterns and colours of living creatures go
to make up a ( form ' which almost never disappoints.

In its highest reaches the imaginative perception rises
into the poet's vision, of which Blake speaks :

" And before my way
A frowning thistle implores my stay.
"What to others a trifle appears
Fills me full of smiles or tears;

270 THE FACT OF BEAUTY

For double the vision my e} T es do see,
And a double vision is always with me,
With my inward eye, 'tis an old man grey,
With my outward a thistle across my way."

While venturing to lay some emphasis on the objectivity
of beauty and on the physiological as well as psychological
side of the aesthetic emotion, we recognise that the higher
factors may come to mean much more than the primary ones.
As Professor Bosanquet says, " Man is not civilised, aestheti-
cally, till he has learned to value the semblance above the real-
ity. It is indeed, as we shall see, in one sense the higher
reality."

A third factor in our aesthetic delight is conceptual. Ex-
perts maintain that nothing which does not appear can count
in the aesthetic impression, but it seems to us impossible to
shut off the effect of associations and the influence of con-
cepts on percepts. There is, for instance, the influence of
the concept of adaptiveness which is always in the back-
ground of the naturalist's mind, as is, indeed, true of most
of us. That thoughtful physiologist, Sir John Burdon
Sanderson, was firmly persuaded that an appreciation of
adaptiveness bulks very largely in our aesthetic enjoyment
of animal form and structure. Canon Hannay speaks of the
delight of watching the flight of birds : " Above the rocks
hovered the gulls with outstretched wings. Sometimes they
slid down the wind till they almost touched the sea. Then
with slow strong beatings of their wings they rose high again,
slanted seaward against the breeze, swept in wide circles,
lazily indifferent as it seemed to destination, but bent on
satisfying themselves with exquisite smooth motion." As
we watch this everyday sight we have purely aesthetic ad-
miration of the grace of the creatures and of the music

THE FACT OF BEAUTY 271

of their movements. There is sensory pleasure and there is
imaginative sympathy. But the delight is subtly heightened
by an appreciation of the fitness of the birds to this mastery
of the air, an appreciation that steals into the mind rather
as an aroma than as a cold-blooded scientific reflection.

By the objectivity of the beauty of Animate Nature we
mean that there is in the ' form ' of plants and animals a
positive quality which excites the aesthetic emotion. Speak-
ing of tragic poetry, Mr. Bertrand Russell says : " it becomes
possible at last so to transform and refashion the unconscious
universe, so to transmute it in the crucible of imagination,
that a new image of shining gold replaces the old idol of
clay. In all the multiform facts of the world in the visual
shapes of trees and mountains and clouds, in the events of
the life of man, even in the omnipotence of Death the
insight of creative idealism can find the reflection of a
beauty which its own thoughts first made." This is splen-
didly said, and that man's mind should be able to assert
" its subtle mastery over the thoughtless forces of Nature '
is something to ponder over, but our concern is with simpler
things than the triumph of imaginative idealisation. We
are pleading for the reality of a beauty which man's thoughts
did not first make.

7. Aspects of Beauty in Animate Nature.

Another question arises : Of what elements does the beauty
of plants and animals consist? The general answer must
be: In combinations and arrangements of lines and colours,
and, in the case of animals, in movements as well.

It has been known for centuries that certain forms are
much more pleasing than others. This has been borne out
by experiments with children and other unsophisticated per-

272 THE FACT OF BEAUTY

sons. Thus an ellipse with its axes in the proportion 5 : 3
has been recorded as very pleasing since 300 B.C. ; it is the
golden or divine section ; it leads on to the mystic pentagram.
But why it is more pleasing than other ellipses, or than a
rectangle, who can tell us ? The eye registers certain forms
with pleasure; there are lines that flow and shapes that sing.
The approximate logarithmic spirals, so common throughout
organic nature, for instance in horns and cones, in shells
and buds, are peculiarly pleasing.

Perhaps this depends in part on racial education. For
racially we were brought up in the country, and grew up
more appreciative of rounded surfaces than of sharp corners.
When we get beyond the domain of the inorganic, Nature
is on the whole a world of curves. We were brought up
on curves. Perhaps certain dominant associations of very
early origin linked curves and pleasure together. Even our
photographic plate our retina is a beautiful curved sur-
face, and this may have something to do with our dislike
of the angular.

Among organisms we like best those with flowing lines,
which repeat one another rhythmically; which conspire, as
Lessing said, to one effect; which are readily summed up;
which compose. We are apt to be less pleased with asym-
metrical animals (like snails), top-heavy animals (like horn-
bills), disproportionately lanky animals (like ostriches), not
that any of these are to be artistically apologised for. We
are least inclined to admire creatures whose architectural
plan is difficult to grasp, which are distracting conundrums,
or those which are too prolonged and monotonous in their
repetition (like millipedes), or those which startle our per-
ceptual conventionalities (like the Indian Ocean fish which
has a window right through it). But our point is simply

THE FACT OF BEAUTY 273

that with a few exceptions (which are too difficult for us)
the lines of living creatures are such that they give us
aesthetic pleasure. This is as true of the microscopic shells
of, Foraminifera and Radiolarians which are joys for ever
as of the lines of the crane and of the cedar of Lebanon.
It is as true of the carefully hidden down-feathers of the
eagle as of the tail of the peacock. It is as true of the
internal architecture of a sea-urchin's spine as of the external
moulding of a tiger. It is as true of the minute chiselling
of many a moth's egg-shell as of the sweeping lines of an
Iguanodon. Is there no significance in the omnipresence
of these pleasing lines ?

The second element in organic beauty is colour, which
so often emphasises and enhances the value of form. It
seems that all wild animals and plants, living an independent
and healthy life and in their natural surroundings, are
beautiful in colour, that is to say, a3sthetically pleasing. The
combinations in parrots, humming-birds, birds of Paradise,
coral-reef fishes, butterflies, orchids, and the like are often
daring, but they are never wrong. That is to say, when
we look at natural schemes of colour we are always pleased,
which means, to begin with, that the chemical processes
set up in our retina are harmonious. It may be remarked
that some skin-diseases involve vivid colours, and that they
displease us, partly perhaps because associations make us
feel them uglier than they are, but partly because they are
ugly, being expressions of disharmonious vital processes,
non-viable failures which Nature scarce troubles to look at,
but casts at once as rubbish to the void. The coloration of
a scallop shell, of a peacock's feather, of a poppy's petal,
and so forth, depends on the orderly chemical processes of
a healthy life, and it is perhaps for this reason primarily

274 THE FACT OF BEAUTY

that they never fail to set up pleasant changes in the human
eye.

The third component of the beautiful in animals is move-
ment. Just as we enjoy watching a waterfall, a fountain,
the waves, or even the dance of motes in the sunlit air, so
we are delighted with the jelly fishes throbbing in the tide,
the flotilla of sepias all keeping time as they swim, the flying-
fishes rising before the prow of the steamer like locusts
before us as we walk in the meadow, the porpoises gam-
bolling in the waves, the jerboas with their startling jumps,
the flight of bat and bird and butterfly, and the way of the
serpent on the rock. Let us watch the last. As Sir Richard
Owen said, the snake can " outclimb the monkey, outswim
the fish, outleap the zebra, outwrestle the athlete, and crush
the tiger ". The accurate zoologist cannot accept every word
of Ruskin's famous description of the way of the serpent,
but he will admit that it gets at the fact of beauty. " That
rivulet of smooth silver how does it flow, think you? It
literally rows on the earth with every scale for an oar;
it bites the dust with the ridges of its body. Watch it when
it moves slowly a wave, but without wind ! a current, but
with no fall ! all the body moving at the same instant, yet
some of it to one side, some to another, or some forward and
the rest of the coil backwards, but all with the same calm
will and equal way no contraction, no extension ; one sound-
less, causeless, march of sequent rings, and spectral proces-
sion of spotted dust, with dissolution in its fangs and dis-
location in its coils. Startle it the winding stream will be-
come a twisted arrow; the wave of poisoned life will lash
through the grass like a cast lance."

Spoil an animal say by fattening and the beauty of
its movements vanishes, we have the waddling duck and

THE FACT OF BEAUTY 275

the wobbling pig. But the general fact unquestionably is
that the movements of wild animals are eurhythmic. We
like them primarily because they set up a pleasant internal
mimicry of eurhythmic movements within ourselves. \Ye
admire the fitness of the structure to the movements ; an
accompanying song may increase the thrill ; we add the
imaginative touch ; the lark is at heaven's gate and we with it,

8. Biological Significance of Beauty to the Beautiful

Organisms themselves.

The question now rises whether the combinations and
arrangements of lines and colours in organisms which mean
so much to us mean anything physiologically in their pos-
sessors. Is there any deep reason behind them ? (a) In
some cases the answer is easy, for the arrangements are ob-
viously useful in giving stability of architecture, in reduc-
ing friction, and in economising materials. Thus one of
the most exquisite structures in the world is the flinty skel-
eton of Venus' Flower Basket (Euplectella) ; and the ex-
perts say that the architecture of this is very perfectly
adapted to stand such strains as are put on it as it rises
like a fairy palace from the floor of the deep sea. A spirally
coiled tendril is a pleasing object, and we know that it is
directly useful in its formation by drawing the climbing
plant closer to its support and afterwards by forming a
spring which yields to the wind but does not break. The
green pigment of a leaf is well known to be the most useful
non-living substance in the world, but though the greenness
is somehow wrapped up with its chemical composition it
might conceivably have worked just as well had it not been
green. On the other hand, colour is often of direct external
utility in giving the animal a garment of invisibility, or in

276 THE FACT OF BEAUTY

giving the flower an advertisement which attracts useful in-
sect visitors.

(b) Secondly there are arrangements of lines and colours
which are not of direct use to their possessors, but have none
the less a physiological significance, heing expressions of
rhythmic growth and orderly chemical processes. The pleas-
ing parallel lines on many shells express periods of growths
like the concentric rings inside the stem of a tree or the
spine of a sea-urchin. The beautiful cross-bars on a hawk's
feather are the expression of diurnal variations in the blood-
pressure at the time when the feather was amaking. The
subtlety of coloration is often due to its rhythmic distribu-
tion its waxing and waning, its paling and flushing so that
it represents very literally the ripple-marks of growth.

(c) But, thirdly, in many cases, we cannot suggest for
the beauty any utility whatsoever, either direct or indirect.
Just as it is the way of water in certain circumstances to
crystallise into very beautiful and very varied snow-crystals,
so it is the way of individualised living matter to form the
exquisitely beautiful shells of Foraminifera and Radiola-
rians. It may be that these relatively simple animals illus-
trate something that may be called organic crystallisation,
though we shall afterwards find reason to suspect that this
is not all ; our present point is that their beauty is not useful.
Just as it is the way of particles of water in the atmosphere
to form a rainbow when the sun shines through, a beautiful
thing that has no meaning at all except to us, so the " beauty
for ashes ' that transfigures the leaves of the forest in their
dying has, so far as we know, no significance whatsoever
to the plant. The withering leaves might as well be ugly,
but they are not. Whence again rises the question, Is there
any meaning in this pervasiveness of the beautiful ?

THE FACT OF BEAUTY 277

The main part of the answer which we would suggest
is simple. Keeping to those combinations and arrangements
of lines and colours which are the expression of development,
growth, and activity, what strikes us as characteristic is their
harmony. The expert in these matters is of course the artist,
the producer of the beautiful and of more than beauty, and
his verdict almost without exception is that every one of
these wild creatures is an artistic unity. The simple reason
for this is that the lines and the colours, in their arrange-
ments and combinations, 'are the expression of unified viable
individualities which have stood the test of time. Perhaps
this is in agreement with Signer Croce's definition of beauty
as " successful expression ". In the age-long struggle for
existence the unharmonious, the ' impossible ', have been
always weeded out before they took firm root and multiplied.
The monster is a contradiction in terms. Meredith put it
all in a nutshell when he said " Ugly is only half way to a
thing ". Nature pronounces her verdict on ugliness by
eliminating it. Beauty is Nature's stamp of approval on
harmonious viable individuality, and just as, objectively,
the ugly is only halfway to a thing, a too incomplete ex-
pression, so is it subjectively. As Professor Bosanquet puts
it (1915), the imagination is " at once excited in a particular
direction and thwarted in it ".

But there is another side to it. In the course of hundreds
of thousands of years our senses have become attuned to the
natural. We have unconscious or conscious standards of
line and colour, of sound and movement. Just as a discord
may break a precious glass vessel by setting up contradictory
vibrations, so there are colour-schemes that almost literally
jar, and muddy colours that are as painful as noises. The
big result remains, that the combinations of lines and colours

278 THE FACT OF BEAUTY

in natural individualities are such that they evoke in us
an activity a disinterested contemplative activity which,
as we have said ; is almost the best of us. This is a note-
worthy correspondence.

9. Beauty of Animal Artifice.

When we pass from incorporated or incarnate beauty to
that of artifice, we experience a delight in which there seems
to be a deeper note than any that we have yet sounded.
When we study the nests of birds, 'the webs of spiders, the
architecture of the termitary, the combs of bees, the work
of tube-building worms, the arenaceous encasements of some
Foraminifera, we recognise skill in the use of materials, or
selection of fit and congruent materials, or a triumphing over
material difficulties, or an expression of individuality at a
level almost reaching to art. Then in a new way deep calls
to deep, we have a sympathetic joy in the creature's mas-
tery of its materials, in its circumvention or solution of
technical difficulties. We enjoy a vicarious victory of
mind over matter. Let us consider once more the arena-
ceous Forminifera, organless, tissueless creatures, with
little visible complexity. When a Technitella makes for it-
self an encasement of minute Echinoderm plates, when an-
other species makes a two-layered warp and woof of sponge
spicules, when a Reophax makes a chain-armour of mica
platelets cemented at their margin with chitin, when a
Marsipella twists its borrowed sponge spicules in a spiral
probably anticipating the prehistoric genius who invented
string, we venture to think that in such moments of en-
'deavour and adventure in dealing with inorganic materials,
artistic consciousness finds its first glimmering expression.
We have argued that organisms are psycho-physical individ-

THE FACT OF BEAUTY 279

ualities, and perhaps we are nearer the truth in saying that
Technitella thompsoni says to itself, in a quiet way of its
own, " Anch' io sono pittore " " I also am an artist ", than
in supposing that its beautiful architecture is describable in
terms of surface-tension. Perhaps an intermediate view is
truer still.

The artist knows of the emotion that rewards formative
achievement, and we have ventured the suggestion that part
of the ordinary man's enjoyment in a beautiful work of ani-
mal artifice (or, secondarily, in a beautiful organism itself)
is a sympathetic sharing in the triumphant mastery of mate-
rials. The same general idea we have found in more devel-
oped expression in a lecture by Dr. P. Chalmers Mitchell
entitled " Science and Life ". From this we would quote
a few sentences. Speaking not of Nature but of art, he
says : " I do not doubt but that the creative artist is a supreme
example of the exuberant will of conscious life to absorb,
comprehend, transform the universe into itself, and that the
emotion he conveys to us is an all-powerful stimulus. The
form that he has created is significant, not because it is a
vision of abstract relations, or of reality, or of truth, but
because it has laid hold of more of the external world, recast
it in categories of human mind and the human senses '
(p. 18). " ^Esthetic emotion is the responsive thrill to
creation realised, and life, seeing the image of its own power,
knows that it is beautiful ' (p. 21).

10. Evolution of ^Esthetic Emotion.

In his Gifford Lectures (1915) Mr. Balfour has spoken
of the absence of any pedigree for aesthetic emotions, and
has suggested that all that evolutionists can do is to regard
them as chance by-products. ^Esthetic emotions have opened

280 THE FACT OF BEAUTY

to Man at his best something conveying not knowledge, but
an intuition that was greater than knowledge. How can
this be if the aesthetic emotions are but the refined outcome
of primeval distributions of matter and energy? We have
tried in our consideration of the organism to take the edge
off such arguments. There are few active evolutionists of
the present day who are committed to such materialism.
From the physical abstractions ( matter ' and ' energy ' it is
impossible to account for emotion, yet emotion may have
evolved in psycho-physical beings such as it seems quite
legitimate to postulate as the first organisms.

^Esthetic emotion is a very subtle feeling, and is possibly
peculiar to mankind, yet it is not inconceivable that its raw
materials up to the level perhaps of a pleased awareness
of specific arrangements of certain lines and colours as dis-
tinguished from others may be detected far below the
human plane of being. Bower-birds are not, of course,
among man's ancestors, but it is interesting to know how
the males decorate their sometimes elaborate courting bowers
with brightly coloured pods and flowers and shells. We must
remember that low down in the kingdom of the unicellulars,
as we have seen, animals select material to work with and
handle it without hands dexterously, and it does not seem
far-fetched to suppose that the creature has a dim pleasure
in its work. We find similar artificers at various levels in
the animal hierarchy, and the thrill accompanying success-
ful formative endeavour will probably strengthen and deepen
with the degree of general differentiation and integration.
From enjoyment of one's own achievement it is possible to
pass to an appreciation of that of others, and in the fact
that some birds will appropriate characteristic phrases of
song from others we have a hint of admiration. It is too

THE FACT OF BEAUTY 281

soon to close the door on inquiry into the evolution of sesthetic
emotion.

We have to remember also that from time to time value
has been given to the beautiful by linking it to love. Shapes,
patterns, colours, lights, fragrance, movements, perhaps orig-
inating for constitutional reasons, as decorative exuberances
arise even in complete darkness, come to be seized upon by
selection and brought into the service of preferential mating.
To this difficult subject we shall return in Chapter XIV.
We simply refer to it now because it suggests one of the
ways in which interest in the beautiful might have been cul-
tivated historically in pre-human days.

Another point worthy perhaps of consideration is that
aesthetic emotion is its own evolutionary reward, since the
feeling has a quite noteworthy unifying value in the develop-
ment of personality, and in its communicability has been,
especially in music, an important socialising factor. This
idea has been elaborated in the work of Guyau that enthu-
siastic evolutionist philosopher who recognised the impor-
tance of the Beautiful and of Art in adding social sympathy
to social synergy. A common admiration and delight helps
to produce a community of feeling and sentiment.

To speak of the evolutionary value of being pleased with
beautiful things does not involve the heresy of suggesting
that we like beautiful things because of an ulterior reward.
The delight is its own reward. But there is no real difficulty
here, for an activity, like play, which is exercised for its
own sake, may none the less have survival value. Beyond
and deeper than this utilitarian interpretation, however,
there is the idea difficult, we confess, to state that just
as a beautiful "organic ornament seems often of no use to
its possessor, but is an expression of a harmonious life, so

282 THE FACT OF BEAUTY

man's joyous drawing towards the beautiful, when we trace
it back far enough, may be an expression of the same, or
of a harmony further back still.

11. The Significance of the Pervasive Beauty of Animate

Nature.

The recognition of the pervasiveness of beauty in the realm
of organisms is important. First, because its enjoyment may
mean much to man part of the salt of life. And though
its enjoyment may not be brought nearer by any cold-blooded
assertions on the subject, man is susceptible to indirect edu-
cation in reference to the beautiful as well as in relation
to the true and the good. Various influences which may
be typified by Gilbert White, Wordsworth, Ruskin, Whit-
man, and Meredith have done much to increase appreciation.
Second, to those who agree with our position that the scien-
tific view of the realm of organisms is not exhaustive, it
will not seem far-fetched that we are inclined to dwell on
the fact of beauty, regarding aesthetic emotion as another
right-of-way path towards reality. It is thus that the beauti-
ful has been thought of by many philosophers, such as
Schiller and Schelling, " not as a casual and fanciful at-
tribute of certain things or mental states, but as an inde-
pendent revelation of the essence of reality of the truly
real' (Merz, 1914, p. 25). Their suggestion is that the
beautiful in Nature may be a key to her deeper significance.
As Lotze put it, " It was of high value to look upon beauty,
not as a stranger in the world, not as a casual aspect afforded
by some phenomena under accidental conditions, but as the
fortunate revelation of that principle which permeates all
reality with its living activity ' (quoted by Merz, 1914,
p. 25). Third, in reference to the triad of human ideals

THE FACT OF BEAUTY 283

the True, the Beautiful, and the Good is there not signifi-
cance in the correspondence that obtains between these and
what we find in nature? To the ideal of the true there
corresponds, perhaps, the rational orderliness and harmoni-
ous consistency of Nature, but rather, we should say, the
reward of those organisms which face the facts effectively
with the clear-headedness of vigorous health. To the ideal of
the good there corresponds the extraordinary subordination
of self to species which is so characteristic of organisms. To
the ideal of the beautiful there corresponds the richness of
the realm of organisms where ugliness is banned.

SUMMARY.

In an endeavour to indicate what contribution Natural Science has
to make to our general view of the world, it is impossible to pass
over the pervasiveness of beauty in the realm of organisms. Scien-
tific investigation has disclosed it in the microscopically minute, in
internal structure, in the well-concealed everywhere.

We mean by the beautiful that which excites in us the distinctive
kind of emotion called assthetic, the characteristic qualities of
which, such as duration without satiety, communicability, and detach-
edness from utility, have been much discussed by experts. What
concerns us in this study is the interesting fact that all natural,
free-living, fully-formed, healthy living creatures, which we can
contemplate without prejudice, are in their appropriate surroundings
artistic harmonies a joy to behold.

This thesis may be objected to on various grounds that beauty
is wholly in our minds, that our likes and dislikes are wholly due
to individual and racial nurture, that there is no agreement as to
what is beautiful; but it seems possible to meet these objections.
Another series of objections, however, consists of evidence that
the realm of organisms is spotted with ugliness; and to meet these
it is necessary to emphasise the saving-clauses of our thesis, that
it does not apply to the domesticated and cultivated, the diseased or
crippled, the unfinished, the parasitic, and the freakish. Moreover,
the artistic harmony is often obscure till the creature is seen in its
native haunts a fact of special importance when these are of its
own choosing.

284 THE FACT OF BEAUTY

In our aesthetic emotion there is a physiological factor of sensory
thrill. Pleasant eurhythmic processes are set up within us, a
bodily resonance. But it is a thoroughly mind-and-body or organ-
ismal feeling. There is a psychological factor or perceptual re-
sponse. We project ourselves into the object whose 'form' (in
the widest sense) is significant for us and embodies our feeling.
We cannot, except abstractly, separate off ' mere sensation ' or
' pure perception ' it is the whole organism's concern and it
seems very difficult to dissociate from our aasthetic delight the in-
fluence of certain concepts. Thus the physiologist, Sir John Bur-
don Sanderson, maintained that an appreciation of adaptiveness
bulks largely in our aesthetic enjoyment of animal form and struc-
ture. Similarly, symbolism may contribute its inextricable influence;
or we may discern the touch of the Divine Artist.

The elements that make up the impression we call visual beauty
are arrangements and combinations of lines and colours, and a
pre-condition of the beautiful is some quality of satisfactoriness in
this pattern. In the case of animals, and somewhat apart, pleasing
movements may be added to the presentation. But the big fact
is that the stamp or halo of beauty is on every free individuality,
and if the straight lines and the curves, the patterns, the colours,
and the apportionment of the colours be expressions of normal vital
processes, and so with rhythmic movements, it becomes easier to
understand why they should appeal in a pleasant way to whole-
some sensoria with the requisite freedom of response.

The question inevitably arises whether these combinations of
lines and colours which mean so much to us mean anything to
their possessors.

(a) There is no doubt that the ' beauty ' has in some cases direct
utility to the organism. For beauty of pattern often spells stable
architecture, beauty of line is often the expression of strength and
agility, and beauty of colouring often means a life-saving garment
of invisibility. And there are other uses.

(b) In many cases the ' beauty ' has vital significance though
it cannot be called in itself useful. Thus a pleasing succession
of concentric lines may represent the ripple-marks of orderly rhyth-
mic growth.

(c) In many cases, however, the beautiful seems to be accessory,
without utility either direct or indirect. The lines and colours are
harmonious, probably because they are the expressions of unified
viable individualities which have stood the test of time. The

THE FACT OF BEAUTY 285

monster is a contradiction in terms and is forthwith eliminated.
" Ugly is only half way to a thing."

Passing from incarnate beauty to that of animal artificers in
encasement and web, in bower and nest we recognise precise selec-
tion of material, effective use of it, and, it may be, a circumventing
or mastery of technical difficulties. There is in varying degrees an
external expression of the individuality, the creature creative.

The difficulty of scientifically accounting for man's * sense of
beauty' is doubtless great, as Mr. Balfour has emphasised; but
this kind of inquiry is young. (1) The raw materials of aesthetic
emotion may have been associated with successful formative en-
deavour. (2) It is well known that interest in the visually and
audibly beautiful has been from time to time closely linked to
Move*. (3) Joyous feeling has a notable unifying influence on
the development both of personality and of society. And there are
other considerations.

Perhaps deepest of all in our assthetic emotion is a sympathetic
sharing in every triumph of l life ' over ' matter ', in every abid-
ing expression and extension of individuality. Thus Animate Na-
ture is to many minds much more significant than Scenery and
Precious Stones, commanding as their beauty is. In any case,
there is for man great value in the beauty of the world without.
There may be theoretical exaggeration in Goethe's saying : " Sym-
pathy and enjoyment in what we see is in fact the only reality "
and it is very satisfying in itself, as reality should be; but there is
no risk of practical exaggeration, for the consistent discernment and
enjoyment of the beautiful cannot be attained on any easier terms
than consistent discernment and enjoyment of the True and the
Good.

LECTURE IX.
THE ISSUES OF LIFE.

LECTURE IX.
THE ISSUES OF LIEE.

1. The Tactics of Animate Nature. 2. The Twofold Business
of Life. 3. The Struggle for Existence. 4. Correction of
Some Misconceptions of the Struggle for Existence. 5. The
Welfare of the Species. 6. As regards Warfare.

1. The Tactics of Animate Nature.

IF we share Bacon's belief that the footprints of the
Creator are imprinted on His creatures, we cannot but be
interested in inquiring into the general trend of organic
activities. What is all the bustle about ? What are living
creatures, as they are, immediately working towards ? If
they have an end in any sense in view, as some of them
have, what is it and by what means do they accomplish
it? Reality has been spoken of as a a totality of striving
and willing existence ", we have in the realm of organisms
a portion of this reality, and we are bound to inquire into
the fundamental motives of the striving and crying that
surround us.

Some students of the tactics of Animate Nature have
discerned in them little to admire and less to imitate. To
Huxley, for instance, it seemed that Nature's tactics are
so disappointing that Man's best rule for his own conduct
is to try to do the direct opposite of what Nature does.
Others, such as Prof. Patrick Geddes, have discerned in
Animate Nature a materialised ethical process worthy of
our closest attention and imitation. Which is right in this
case, master or pupil ? Others, again, while making no

289

290 THE ISSUES OF LIFE

pronouncement, have deprecated further inquiry, reminding
one of people who are nervous as to the manners of their
poor relations. The inquiry is interesting, for if we have
made the great assumption that the system of lives which
we call Animate Nature is an expression of something more
spiritual and abiding than itself a difficulty will arise if
the tactics are those of " a dismal cockpit ".

Those who believe that Nature is (as Prof. William James
phrased it) " the external staging of a many-storied universe,
in which spiritual forces have the last word ", will have
to face a great difficulty if what is often reported about
Nature be even approximately true, that her only word to
man is " Each for himself, and extinction take the hind-
most ". We turn again therefore to our task of justifying
the ways of Nature to man by the method of accurate de-
scription.

In inquiring into the general tactics of Animate Nature,
which we have seen to be pervaded with vitality, with men-
tality, and with beauty, we must avoid two extremes. The
one focusses attention on Move', the other on ' hunger';
the one emphasises race-preserving, the other self-preserving
activities. On the one hand, there is a wealth of illustrations
of parental care, of conjugal devotion, of mutual aid, of
loyalty to kin, of subordination of the individual to the
life of the herd or hive, in short, of ' altruistic behaviour ',
if we can use the term in inverted commas to indicate that
it is below the level of strictly ethical conduct.

The other extreme is appalled by the daemonic element in
Nature, the non-moral callousness, the wastefulness, the ruth-
lessness, the egoism, the mere ' weather '. It is well ex-
pressed in William James's famous essay 7,9 Life Worth Liv-
ing? "Visible nature," he says, "is all plasticity and

THE ISSUES OF LIFE 291

indifference, a moral multiverse, as one might call it, and
not a moral universe. To such a harlot we owe no allegiance ;
with her as a whole we can establish no moral communion '
(1905, p. 43). "Beauty and hideousness, love and cru-
elty, life and death keep house together in indissoluble
partnership; and there gradually steals over us, instead of
the old warm notion of a man-loving Deity, that of an awful
power that neither hates nor loves, but rolls all things to-
gether meaninglessly to a common doom ' (1905, p. 41).

Now there is a via media between these two extreme
views, and it is the path of accuracy. On the one hand,
we must not pick and choose our facts, selecting those which
suit our thesis and ignoring the discordant. On the other
hand, we must not be gratuitously anthropomorphic, project-
ing upon Nature concepts drawn from human society which
very imperfectly fit. We must also guard against allowing
human sentiments, as to supposed cruelty and the like, to
lead us astray in domains where they are irrelevant. We
must be restrained and critical in the degree to which we
read ethical content into animal behaviour, especially when
it is of the instinctive type.

2. The Twofold Business of Life.

As we contemplate the drama of life among plants and
animals, both as we can see it around us with our eyes,
and as we can see it with the help of telephotic apparatus
(such as the microscope and the palseontological museum!),
we discern one perennial problem and endeavour, namely to
adjust relations between the active, self-assertive, insistent,
insurgent organism and the environment. The inorganic
environment is callous, irresponsive, heavy-handed, yet re-
markably amenable to life's purposes; the organic environ-

292 THE ISSUES OF LIFE

ment is capricious, unpredictable, combative. On the one
hand, we see the Environment acting upon the organism,
burning it and stoking it, heating it and cooling it, quicken-
ing it and slowing it, moistening it and drying it, provoking
it and quieting it, nurturing it and killing it, cradling it
and burying it. On the other hand, we see the Organism
responding to the environment, operating on it, changing it;
thrusting as well as parrying; defying it, mastering it, and
using it; even selecting it. Now the business of life is the
continual adjustment of this twofold relation. But when
we look more closely into the effective, regulated, self-asser-
tive, self-expressive, insurgent activity which we call ' life \
we see that it takes two main directions caring for self
and caring for others. That is the twofold business of life
which all pursue, the half-awake plant, the dreamy coral,
the instinctive ant, the intelligent beaver, and rational man.
The imperious primal impulses are ' Hunger ' and ' Love ',
the subject and counter-subject of the great fugue of life.
" Why do the people strive and cry ? ' the poet asked,
and gave the lasting answer : " They will have food and
they will have children, and they will bring them up as
best they can." So is it through the realm of organisms.
Of course the words ' hunger ' and i love ' must not be used
woodenly ; they correspond to self-preservation and race-con-
tinuance, to self-regarding and other-regarding, to feeding
and flowering, to nutrition and reproduction, to self-increase
and self-multiplication. We may not be inclined to speak
as Erasmus Darwin did of the ''Loves of the Plants", but
it is sound science to emphasise the fact that, rich as plants
are in adaptations which secure food, they are not less rich
in adaptations which secure the nurture and dispersal and
development of their offspring.

THE ISSUES OF LIFE 293

In their endeavours to secure self-preservation and race-
continuance, organisms exhibit an effectiveness, a persist-
ence, a resourcefulness, and a finesse that is worthy of all
admiration. But the shadow on the picture is the supposed
Ishmaelitish character of the struggle for existence, the
shadow of what Huxley called " the huge gladiatorial show ".
Sometimes, too, there is an occurrence of what looks like
sheer devilry.

3. The Struggle for Existence.

One of the great facts of life, beyond all doubt, is that
summed up by Darwin as " the struggle for existence ".
Nothing is more familiar, and yet the concept lacks precise
definition and is the subject of lamentable misunderstanding.
The phrase, as Darwin said, was to be used " in a large
and metaphorical sense, including dependence of one being
on another, and including (which is more important) not
only the life of the individual, but success in leaving prog-
eny " (Origin of Species, p. 50). This does not coincide
with the view of some naturalists that the struggle for ex-
istence means nothing more nor less than life-and-death
competition between individuals of the same kith and kin.
If that had been Darwin's meaning, he would not have spoken
of using the term " in a large and metaphorical sense ", nor
would he have spoken of the difficulty he felt in constantly
bearing the conclusion in mind. We have to be especially
careful since the idea of the struggle for existence was
confessedly taken over from human life. It was consciously
suggested to Darwin by reading Malthus; it was subcon-
sciously suggested by the keen industrial competition, more
striking, because more novel and less regulated, in Darwin's
day than ours.

294 THE ISSUES OF LIFE

Tt is clearest to start with the familiar fact of observation
that the life of organisms is seldom an easy affair. The
living creature is by its very nature insurgent and it finds
itself encompassed by limitations and difficulties. As Spi-
noza maintained, every individual thing, so far as in it lies,
endeavours to persist in its own being. How much more
a living agent, that eats into its environment, that grows
and stores and multiplies its kind ! The vigorous creature
is ever hustling and jostling in its will to live. Now, as
every one knows, this insurgence of life meets three main
difficulties, and the struggle for existence in the strict sense
is the reacting clash.

The first difficulty is in the tendency to over-population.
One weed could cover the earth in three years, one codfish
could soon fill up the vastness of the sea, and one fly could
soon shut out the sun. This tendency to overwhelming abun-
dance limits the foothold and food-supply of the prolific
organisms and of others in the same area; there are indi-
vidual reactions against the limitations, and these constitute
the struggle for existence which soon counteracts one of its
own causes. A second difficulty follows from the pattern of
the web of life, that is to say, from the nutritive inter-rela-
tions that have in the course of time been established. Plants
have banked for animals, which draw on them. The higher
animals devour the lower, and Nature is run on a plan of
successive reincarnations. This conjugation of the verb to
eat involves difficulties, and leads to the struggle for ex-
istence. A third limitation is the irregular changefulness

A

of the physical environment.

None of the reasons which we have just recalled can be
said to necessitate the struggle for existence. (1) There
might have been a flood-bed for the teeming river of life,

THE ISSUES OF LIFE 295

and we know in point of fact that incalculable myriads of
minute creatures flourish in the open sea without over-
crowding. Moreover, the length of an organism's life is
adjustable, and can be regulated in relation to the rate of
increase. (2) It is conceivable that all animals might have
been vegetarian and debris-eaters. To a much greater degree
than was previously supposed the animals of the sea-floor
depend upon detritus, the crumbs of the littoral table. Or
much more might have been made of symbiotic partnerships
between animals and plants, so extraordinarily successful
in cases like Radiolarians, of which some authorities say
that there are five thousand species. (3) There is no neces-
sity that life should be continually vexed by environmental
vicissitudes, for there are monotonous conditions in which
it flourishes bravely. We know, for instance, of the rich
fauna of the great oceanic abysses that strange, dark, cold,
calm, silent, plantless world where there is neither day nor
night, neither summer nor winter, but eternal monotony.
We see, then, that the struggle for existence is not an in-
evitable consequence of the conditions of life. In fact, it
is often evaded. Reduction of the number of offspring is
an evasion of the difficulty of finding foothold in crowded
areas; change of diet, e.g., to vegetarianism, evades the
necessity for cannibalism ; and migration often evades the
thrusts and arrows of an unfriendly environment. The true
inwardness of the struggle for existence is discerned when
we fix our attention not only on the limitations and difficul-
ties, but on the self-assertiveness and insurgence of the crea-
ture, which insists on having its own way.

A second point is that the struggle for existence is not
synonymous with great mortality. That may be a problem
in itself, but it is not the problem of the struggle for exist-

296 THE ISSUES OF LIFE

ence. When an avalanche or a landslip, on any scale we
please, or a sudden fall of temperature, or a great drought,
or any catastrophe wipes out whole regiments of living crea-
tures, the struggle for existence is not illustrated, for the
essential idea in the concept of struggle is that the living
individual answers back. When on the summer evening the
mayflies rise like a living mist from the quiet reaches of
the river, and in some cases end their ephemeral aerial life
before the twilight is past, there is assuredly great mortality,
but there is not in the dying any struggle for existence.
They die off in the crisis of giving origin to the next gener-
ation, and as they may have spent two or three years of
larval sub-aquatic life they may be at their death quite old
as insects count age. Similarly, when the baleen whale rush-
ing through the waves engulfs myriads of sea-butterflies in
the huge cavern of its mouth, there is great mortality,
but no struggle for existence. Nor is there when the
squirrel has a meal of beech-nuts, each of them a young
life.

The essential idea, often missed, is that the struggle for
existence is the clash between life and its limitations, when
life insists on its rights and answers back. When organisms
react to their limitations and difficulties, when they do not
meet these passively, but thrust and parry, experiment and
actively evade, and in a hundred ways say " We will live ",
there is the struggle for existence. The essence of the
struggle is the endeavour after well-being.

Another point, somewhat difficult at first sight, is that
inter-specific struggle for existence is not illustrated when
all the members of a species meet a difficulty by the same
adaptive response, the capacity for which is now ingrained
in their constitution. Thus many species offer interesting

THE ISSUES OF LIFE 297

solutions of the problem of meeting the winter; the brown
stoats, for instance, by becoming white ermine. But nowa-
days the stoats cannot help changing their robe ; in the same
locality they all do it equally well; the ingrained capacity
is the indirect outcome of the struggle for existence in the
distant past; the stoat's present-day struggle for existence
is to be found elsewhere. Inter-specific struggle for existence
implies individual and novel reactions and responses to en-
vironing difficulties and limitations. As we understand it,
inter-specific struggle for existence cannot be illustrated in
regard to adaptations shared equally by all the members,
but it may be illustrated if there are inequalities in these
adaptations, or in the way they are used, or in individual
adjustments.

It should also be noted that it is a confusion of thought
to identify the struggle for existence with Natural Selection.
The concept of struggle is wider than that of selection. The
struggle for existence is to be found in the reactions between
organisms and their environing limitations, which may in-
clude, of course, the presence or antagonism of other organ-
isms. When inequalities or idiosyncrasies in the reactions
or responses are of life-saving importance the result is dis-
criminate elimination and the survival of the relatively fitter
to the given conditions. But in many cases the result of
the struggle for existence is not discriminate elimination.
There may be nothing more than a lessening of population-
pressure by a large reduction of numbers. And even when
discriminate elimination does occur, it may work as slowly
as the mills of God. Some writers speak as if a decision
was always given there and then. But that is a misunder-
standing. The elimination may take the form of gently
handicapping those who lack what others have, handicap-

298 THE ISSUES OF LIFE

ping them so that they have a rather shorter life or a rather
less numerous or less successful family. This is precisely
what eugenists of the gentler persuasion wish to see in opera-
tion in mankind the replacement rather than the destruc-
tion of the baser sort.

As is well known, the struggle for existence takes three
main forms: (a) between fellow-organisms of the same
kith and kin, (fr) between foes of entirely different kinds,
and (c) between living creatures and the physical fates.

In regard to the first, Darwin headed a paragraph " Strug-
gle for Life Most Severe Between Individuals and Varieties
of the Same Species ", and that paragraph, along with a
subconscious desire to get a theoretical backing for individu-
alistic human practices, has given rise to the widespread idea
that what is most characteristic of Nature is an internecine
competition of near kin for food and foothold.

But it is very profitable to examine Darwin's evidence
for his momentous conclusion. Not that we doubt that keen
competition between fellows is one mode of the struggle for
existence ; the point is to what extent it obtains. The gladia-
torial show conception of Animate Nature is illustrated by
the supposed internecine competition between brown rat and
black rat, and might almost be called the rat theory of life.
The story of this internecine competition, for which Darwin
is largely responsible, is well known, but it suffers from
the demerit of not being quite true. Long ago Britain had
only the Black Rat (Mus raitus) which probably came from
Asia through Mediterranean ports. It seems to have been
introduced into Western Europe by the ships of the
Crusaders. The Brown Rat (Mus decumanus), also of East-
ern origin, was a later arrival, becoming common in the early
part of the eighteenth century.

THE ISSUES OF LIFE 299

the story which had till recently all the expert
authority behind it, is that the larger, stronger, fiercer Brown
Rat killed off the Black Rat everywhere, and by competition
to the death took its place. But the account of the matter
given by Dr. Chalmers Mitchell is very different. The Black
Rat is far from being extinct in Britain ; it is wild and shy,
much more active than the Brown Rat ; it is the typical
barn and granary rat. The Brown Rat is more of an out-
door creature, though the haunter of sewers and drains, to
the great extension of which it probably owes a considerable
part of its success.

Let us allow that the ranks of the Black Rat have been
increased by fresh imports ; let us allow that it once was
the ' common rat ' and is so no longer ; let us even allow
that if representatives of the two species are shut up in a
cage together (a condition of which there are few counter-
parts in nature!) the brown rats will kill the blacks; yet
the edge has been taken off Darwin's famous illustration,
the best piece of evidence he adduced in support of his thesis.
As Dr. Chalmers Mitchell says, " In this story of the rats,
which has been very carefully investigated, there is no trace
of a process comparable with the German theory of war
as an instance of the struggle for existence. . . . Each
species has its different aptitudes, capacities, and prefer-
ences, and each insinuates itself into the most suitable en-
vironment ' (1915, p. 30). The internecine competition
has not taken place. A compromise was effected.

The second form of the struggle for existence is between
animate foes of entirely different kinds, between herbivore
and carnivore, between birds of prey and small mammals,
between the grass and the other plants of the meadow, be-
tween the thorns and the seedlings in the stony ground.

300 THE ISSUES OF LIFE

Here the competition is sometimes keen, but sometimes a
very one-sided affair.

The third form of the struggle for existence is between
living creatures and the callous and changeful physical en-
vironment. Thus Darwin spoke of the struggle of the plant
at the edge of the desert, and one thinks of reactions of
animals against the winter's cold, and so on. This is obvi-
ously non-competitive ; it is crossing swords with Fate.

So we see that in the struggle for existence between or-
ganisms and the inorganic environment, the element of direct
competition is always absent; in that between organisms of
entirely different kinds whose interests conflict it is often
absent; and even in the struggle between members of the
same kith and kin the supposed state of internecine warfare
is often conspicuous by its absence. The furious battles
between different kinds of ants, and between disorganised
hives of bees, and between true ants and white ants, are
among the few phenomena in the animal world that suggest
human warfare.

It may be said that this is surely cutting at the roots of
Darwinism (Natural Selectionism) to deny that fellows of
the same kith and kin are sifted inter se, but we make no
such denial. Our doubt is as to whether the sifting is often
effected by internecine intra-specific competition. Individ-
uals possessing an advantageous variation which enables
them to meet difficulties successfully are favoured by Natu-
ral Selection, as the phrase has it; our point is that their
success does not necessarily depend on any warfare or com-
petition with their fellows. When a plague enters a house-
hold and only one member survives, he does so because his
constitution successfully parried the microbe, not by any
competition with his brothers and sisters. When the last

THE ISSUES OF LIFE 301

rabbit in the scamper towards the warren is caught by the
fox, his elimination is not the result of there being others
of his kind who are more alert and agile. The barbarous
proverb Lupus lupo lupus was invented by Man as an excuse
for his own unnatural behaviour, and there is much better
biology in Kipling's Jungle Books.

4. Correction of Some Misconceptions of the Struggle

for Existence.

A number of attempts have been made to correct the idea
which has taken such firm hold of men's minds that Nature
is in a state of ceaseless warfare and that there is especially
frightful competition for food and foothold among the mem-
bers of the same species. Thus Herbert Spencer was clearly
of opinion that the purely self-seeking animal is a fiction.
" Self-sacrifice is no less primordial than self-preservation."
" From the dawn of life, altruism has been no less essential
than egoism."

Darwin himself in The Descent of Man showed that in
many animal societies the struggle between individuals dis-
appears, being replaced by co-operation. Survival is not
restricted to the strongest, but may reward those that give
the best send-off to their offspring or excel in self-subordina-
tion and mutual support. " Those communities," he wrote
(Descent of Man, 2nd Ed., p. 163), "which included the
greatest number of the most sympathetic members would
flourish best, and rear the greatest number of offspring."
It should be remembered, too, that one of the tasks which
Darwin proposed for himself, but did not accomplish, was
an inquiry into the natural checks to over-multiplication.

Kessler, a Russian zoologist, brought forward evidence
in support of the thesis that " in the evolution of the organic

302 THE ISSUES OF LIFE

world in the progressive modification of organic beings
mutual support among individuals plays a much more im-
portant part than their mutual struggle ". Prof. Patrick
Geddes also argued that the popular version of the Darwinian
picture had become distorted into falseness, and advanced
illustrations of the evolutionary role of other-regarding as
opposed to self-gratifying activities, and of the survival-
value of subordinating the self to the species. Prof. Henry
Drummond in his Lowell Lectures gave an eloquent expo-
sition of the importance of the struggle for others as con-
trasted with the struggle for self. Best of all, because most
concrete, were Prince Kropotkin's essays on Mutual Aid.
With a wealth of illustration he showed the pervasiveness
of mutual aid and mutual support in the Animal Kingdom.
To him it seemed as much a law of life as mutual struggle,
and " of the greatest importance for the maintenance of life,
the preservation of each species, and its further evolution ''.
Now while it is useful to hold over against aggressive
competition the fact of mutual aid, there is a more radical
way of stating the case. The idea of two struggles, one
for self, and one for others, is artificial, and it must be
borne in mind that there is much self-expression and much
self-subordination which has no direct connection with strug-
gle in the technical sense; witness, for instance, the ex-
pression of a well-adapted parental nature that is not meet-
ing with any particular difficulties or limitations. How is
the case to be stated ? By going back to Darwin's position.
Self-assertive organisms, whose inmost nature is endeavour,
find themselves faced with bafHing difficulties, hemmed in by
thwarting limitations. Whenever the creature answers back
in an individual way, girding up its loins against these
difficulties and hurling itself against these limitations, there

THE ISSUES OF LIFE 303

is the struggle for existence. But there are many different
ways of answering back ; there are many different cards
that the organism can play. One creature uses its weapons
with increased skill, another finds discretion the better part
of valour; both are reacting in the struggle for existence.
One creature intensifies its competitive efforts, another seeks
to ensure the safety and success of its offspring; both are
reacting in the struggle for existence. In the egg-capsules
of the whelk some of the larvae devour the rest a grim
cannibalism in the cradle this is the one extreme, of which
there are few illustrations. As nestling birds are only in
process of becoming warm-blooded, it is of great importance
in many cases that they should be surrounded by non-con-
ducting materials. When we see an individual bird taking
particular care to add feather to feather till there are over
two thousand, we know that it is unmistakably strengthen-
ing its own and its family's foothold in the struggle for
existence, but its reaction to environing difficulties does not
hurt any other bird. This is at the opposite pole, and
similar illustrations abound.

The race is not always to the swift nor the battle to the
strong. The concept of struggle includes self-assertive com-
petition, but it also includes a gentle endeavour after well-
being. One creature asserts itself by sharpening its claws
and whetting its teeth, another finds a place where it is
invisible. One intensifies competition with its kin around
the platter of subsistence though this is much less frequent
than is supposed ; another expresses itself in more elaborate
parental care. Nor can we forget that evasive change of
habit and habitat known as parasitism the door to which
is always open. The organism has many a thrust and parry,
all of which are logically included in the conception of

304 THE ISSUES OF LIFE

reactions and responses to environing difficulties and limi-
tations.

Thus the nightmare picture of the Struggle for Exist-
ence as " a dismal cockpit ' gives place to a more accurate
one. It is often an Endeavour after Well-being on a non-
competitive basis. We see reason to regard as inaccurate
the conception of Animate Nature as " all weather ".

We must not allow interests other than those of accuracy
and consistency to intrude in scientific inquiry, but the fact
must be pointed out that vague views of what obtains in
Nature have had a deplorable influence in human affairs.
What was at first said almost in jest, " The struggle for
existence laissez faire the survival of the fittest ", has
become to some a philosophy of life. There has been a sin-
ister effect of careless Darwinism. As has been well said,
" It has given the seeming sanction of science at one time
to a soulless commercialism, at another to an overweening
pride of race and the lust of dominion. By one of the par-
adoxes to which the history of thought is prone, the theory
of progress has been in the main a weapon in the hands
of intellectual and moral reaction. But every new theory
has to go through its infantile diseases. The worst of these
arises from that distemper of the mind, peculiarly prevalent
in the half-educated world of modern thought, which prompts
men to pick up ideas which specialists have elaborated for
their own purposes in their own departments and apply them
indiscriminately as catchwords to settle questions arising in
another sphere."

What is fallacious in the careless Darwinism alluded to?
There is: (1) a narrow and wooden conception of the
Struggle for Existence which includes many endeavours that
are not directly competitive at all ; (2) a failure to perceive

THE ISSUES OF LIFE 305

that the survival of the fittest means only the survival of
those relatively best adapted to particular conditions, which
may be parasitism or (in some ants) slave-keeping; (3) a
forgetfulness of the apartness of human society from the ani-
mal world with which it is nevertheless solidary an apart-
ness which forbids any uncriticised transference of a purely
biological induction to social affairs; and (4) an ignoring of
the historical fact, which we dare mention even after years
of carnage, that the trend of civilisation has been away from
the harsher forms of Nature's regime.

5. The Welfare of the Species.

When we pass from the struggle for existence in its many
forms to consider old-established activities which secure the
welfare of the species, we arrive at a result which colours
our whole view of Animate Nature, and is of great interest to
philosophy, to that philosophy at least which has one hand
on Human History and the other on Natural History, and
is as a daysman between them. Postponing the difficult
question as to where we should draw the line which de-
limits set purpose, we find that a very large part of the time
and energy of living creatures is given over to activities
which do not make for self-increase or self-stability or self-
preservation, but make for the welfare of the family, the
kin, and the species.

To a degree which has not been adequately realised by
naturalists, organisms are adapted to, and give themselves
up to securing the welfare of their race. In their multipli-
cation, in their reproductive processes, in their parental care,
individuals spend themselves in activities which are often
not to their own advantage. Their personal interests have
been subordinated to those of the species. They are borne

306 THE ISSUES OF LIFE

on by impulses and instincts which are as compelling as
hunger and thirst, but the satisfaction of these rarely makes
for individual advantage. Indeed it is often fatal. Repro-
duction is often not merely the distant beginning of the
individual's death, but has death as its immediate nemesis.
In some higher animals love is its own reward and the
parental life is enriched by the family, but this is true only
of a minority. Even sexual gratification is as often absent
as present. According to Goethe, Nature holds that for the
pains of a lifetime it is fair payment to get a couple of
draughts from the tankard of love. But many animals have
only one draught and many none at all. How many insects
there are, with a parental solicitude and an elaborateness of
care that strikes one dumb, who have not even the psychic
reward of seeing the offspring for the good of which they
more or less unwittingly spend themselves.

Professor Cresson (1913) has done a notable service in il-
lustrating with accuracy and learning the extent to which
there is subordination of the individual to the species. There
is the physiological cost of producing germ-cells, so obvious
in some fishes ; of nourishing the young before birth famil-
iarly great in most mammals ; of feeding the offspring after
they are hatched or born as in many insects and almost
all birds and mammals. There is the danger and exhaustion
of reproduction, for many female organisms die of it, and
the drone-bees are far from being the only males that are
sacrificed on the altar of sex.

Taking birds, for instance, we are all more or less familiar
with the work of nest-making (MacGillivray counted over
two thousand feathers in the nest of the Long-tailed Tit),
with the patience of brooding (sometimes involving fatal
exposure), with the prodigious industry exhibited in feeding

THE ISSUES OF LIFE 307

the family (the parent bird wearing itself to a skeleton) ,
with the self-forgetfulness shown in guarding, cleaning, and
educating the young. But have we sufficiently weighed the
general fact that although it is the birds' meat and drink
to do all this, it is not self-preservation at any rate that
results ? Many adult insects spend by far the greater part
of their time and energy in securing the safety of their eggs
and the nourishment of the young. It is hardly an exag-
geration to say with Cresson : " Everything for the species ;
everything by the individual ; nothing for the individual."

What difficulties often lie in the way of the fertilisation
of the egg-cell ! How many tens of thousands of years, how
many variations, how much vital energy, how much searching
elimination have gone to the establishment of the adapta-
tions which secure this end, the fragrance, the flags of
colour, and the strategically placed nectaries in flowering
plants, the imperious desires, the intricate attractions, and
the subtle psychical embroidery in the case of animals.
There are parallel adaptations of structure and habit, which
secure the welfare of the young.

The fact which must be included in our conception of
organic life is the amount of energy that is expended towards
the maintenance of the species rather than towards self-pres-
ervation and self-gratification. Animals have become or-
ganically interested in working for the species, and even
though they know it not, their individuality completes itself
in the larger life of their race. What it seems to mean,
according to current evolution-theory, is that variations (prob-
ably altogether germinal to begin with) in directions which
made for the welfare of offspring, family, society, or species,
have been established in the course of selection no less
securely than those which made for self-preservation. Meta-

308 THE ISSUES OF LIFE

phorically speaking, we may say that this has been Nature's
way of setting the seal of her approval on altruistic be-
haviour, even when the animal's left hand does not know
what its right hand doeth.

6. As regards Warfare.

The position here defended has an obvious practical in-
terest, in reference to war, for some have seriously main-
tained that human warfare has what is called ' Nature's
sanction ', that it is consonant with what goes on throughout
Animate Nature, which is believed to be in a state of uni-
versal Hobbesian warfare, each against all, and no discharge
for any. Moreover, human warfare is declared to be a con-
tinuation of a natural process which necessarily leads to the
survival of the relatively more fit. In the words of von
Bernhardi : " Wherever we look in nature, we find that war
is a fundamental law of evolution. This great verity, which
has been recognised in past ages, has been convincingly dem-
onstrated in modern times by Charles Darwin."

Prof. Karl Pearson has given strong expression to the
view that a nation should be " kept up to a high pitch of
internal efficiency by insuring that its numbers are substan-
tially recruited from the better stocks, and kept up to a high
pitch of external efficiency by contest, chiefly by way of war
with inferior races, and with equal races by the struggle
for trade-routes and for the sources of food supply ' . . .
(1901, p. 44). "When the struggle for existence between
races is suspended, the solution of great problems may be
unnaturally postponed ; instead of the slow stern processes
of evolution, cataclysmal solutions are prepared for the
future." . . . (1901, p. 20). "There will be nothing
to check the fertility of inferior stock; the relentless law

THE ISSUES OF LIFE 309

of heredity will not be controlled and guided by natural
selection. Man will stagnate' . . . (1901, p. 24). Thus
imperialism and militarism find theoretical justification,
even from one who is quite clear that " the safety of a
gregarious animal and man is essentially such depends
upon the intensity with which the social instinct has been
developed ". " The stability of a race depends entirely on
the extent to which the social feelings have got a real hold
on it" (1901, p. 47).

We need not raise the question of the wisdom of appeal-
ing to Nature for ethical guidance, nor dwell on the danger
involved in the fact that the Darwinian concept of struggle
arose historically from a consideration of human problems;
there are more important things to say. First, as we have
seen, internecine competition among near kin is only one
mode of the struggle for existence. Especially among the
finer forms of life do we find that the answer-back which
is given to the environing limitations is less and less fre-
quently an intensification of competition, is more and more
frequently something subtler, some modification of parental
sacrifice, some co-operative device, some experiment in so-
ciality. Dr. Chalmers Mitchell goes the length of saying
(too strongly, we think) that " the struggle for existence
as propounded by Charles Darwin, and as it can be fol-
lowed in Nature, has no resemblance with human warfare '
(1915, p. 108). And again, as entirely independent con-
firmation of what we have maintained in Darwinism and
Human Life (1909) and elsewhere, we may quote this in-
teresting passage : " Looking through the Animal Kingdom
as a whole, and remembering that the Vegetable Kingdom is
as much subject and responsive to whatsoever may be the
law of organic evolution, I find no grounds for interpreting

310 THE ISSUES OF LIFE

Darwin's ' metaphorical phrase ', the struggle for existence,
in any sense that would make it a justification of war be-
tween nations. It is my business just now to refute a mis-
conception of the struggle rather than to explain what it is.
But, if the latter were my task, I could adduce from the
writings of Darwin himself, and from those of later natu-
ralists, a thousand instances taken from the Animal King-
dom in which success has come about by means analogous
with the cultivation of all the peaceful arts, the raising
of the intelligence, and the heightening of the emotions
of love and pity" (1915, p. 41).

Second, in spite of the one hundred and fifty definitions
of war, we may venture to regard the essence of it as an
organised flesh and blood struggle between communities or
nationalities, and if this be so its analogue is to be looked
for in the quite exceptional group-competition which some-
times occurs among some social insects, notably among ants,
and not in the competitive forms of the struggle which may
occur between individual animals of the same species.

Third, as Dr. Chalmers Mitchell points out, the fallacious
comparison between human warfare and the struggle for
existence breaks down because " modern nations are not
units of the same order as the units of the animal and
vegetable kingdom' (p. 108). Nationalities " differ from
the units of zoology and botany in that the individuals
composing them are not united by blood-relationship. Even
if the struggle for existence were the sole law that had shaped
and trimmed the tree of life, it does not necessarily apply
to the political communities of men, for these cohere not
because of common descent but because of bonds that are
peculiar to the human race ' (p. 64) .

The appeal to human history, which the militarists make

THE ISSUES OF LIFE 311

confidently, has seemed to many to show that civilisation
was born out of war. Even Maine spoke of the " Universal
belligerency of primitive mankind ". But scientific inquiry
does not confirm this conclusion. In a valuable article Mr.
Havelock Ellis (1919) makes the following points : (1) Chel-
lean man, who first used permanent and indubitably human
tools, may have lived about 27,000 years ago, so that our
' historical ' period does not cover a large part of our his-
tory. But what Palaeolithic weapons and art suggest is
in the main hunting not fighting. (2) If the culture of the
primitive Mousterians survives among the Australians, that
of the Aurignacians among the Bushmen, and that of the
Magdalenians among the Eskimo, what the study of these
contemporary ancestors of ours seems to show is that war,
apart from regulated punishment and blood-vengeance, is
almost unknown. ' Savages 7 are on the whole not warlike.
(3) " War probably began late in the history of mankind,
it developed slowly out of animal hunting by way of a
regulated attempt to secure justice as well as the gratifica-
tion of revenge, it was immensely stimulated by the dis-
coveries of the metals, and especially iron ; above all, it
owed its expansion to two great forces, the attractive force
of booty and commercial gain in front, and the propulsive
force of a confined population with a high birth-rate be-
hind. . . . r " War was a result, and not a cause, of social
organisation."

We think that there is a risk of exaggerating the impor-
tance of a high birth-rate as a factor in the evolution of
warfare, for primitive peoples had their own rough ways
of keeping a population balance. Perhaps, again, Mr. Ellis
underrates the importance of variation especially social
variation as a cause of war. Therefore while it is with

312 THE ISSUES OF LIFE

conviction that he looks forward to the control of the birth-
rate and to the regularisation of industrialism as likely to
bring wars to an end, we should add as a more positive pacific
factor an increase of inter-relations which will promote
tolerance for, and intelligent appreciation of those who are
very different from ourselves.

But the immediate point is that the militarists 7 appeal to
history is not any more convincing than their appeal to
biology. The facts are against them in both fields.

The third appeal of the militarists is to ethics, and may
be illustrated by Moltke's famous letter of 1880 " Eternal
peace is a dream, and not even a beautiful dream, and war
is a part of God's world-order. In war are developed the
noblest virtues of mankind; courage and sacrifice, fidelity
and the willingness to sacrifice life itself. Without war
the world would be swallowed up in materialism." There
are two half-truths here. The first is that war does evoke
noble virtues; the missing half is that there are other en-
deavours outside of war that may evoke these virtues not less
well, and much less wastefully. Moreover, no one can forget
that war evokes other qualities than virtues. The second
half-truth is that struggle and sifting seem to be needed
for the welfare of humanity; the missing half is that war
is only one of the many forms of struggle. As Havelock
Ellis tersely puts it, " Conflict is a genus with many species,
of which war is only one " and one of violence, from which
at every level it is the effort of civilisation to deliver us.
Struggle we can never do without, but of war the world
has had more than enough.

Let us state the case more generally. Endeavour and
sifting are surely conditions of progress, but war between
races is only one mode and it seems very doubtful that it

THE ISSUES OF LIFE 313

makes for real superiority. If the energy misdirected by
the facile acceptance of bad biology were turned to prac-
ticable eugenics, to hygienic reform, to inter-national ad-
venture, if men looked out for the " moral equivalents of
war ", there might be a way out of the impasse which Prof.
Karl Pearson pictures as inevitable if there is cessation in
the struggle of race against race. Are we not beginning
(to use Prof. Lovejoy's words) " to recognise that the effort
to cram the moral ideas of civilised man into the rigid mould
of the natural selection hypothesis is an artificial and not
very promising enterprise ' (1909, p. 99) ?

Furthermore, when Man has recourse to internecine com-
petition among fellows, to what is, let us say, remotely anal-
ogous to a primitive and crude form of the struggle for
existence exhibited by amoebae, if not by rats he cannot
console himself with the belief that this must result in the
survival of the fittest in any desirable human sense. For
the struggle for existence need not result in the survival of
the strongest, cleverest, or best. It never results in more
than the survival of those relatively more fit to the given
conditions, and these may be on the downgrade, not on
the upgrade. As a matter of fact, there is considerable reason
to believe that, as regards the members of either side, war
acts on the whole dysgenically, by sifting out those whom
the race can least afford to lose.

IN CONCLUSION.

It is not maintained that there are no shadows in Nature
< wildness ? , wastefulness, parasitism, and even, at times,
positive disharmony but, postponing a discussion of some
of these difficulties, we are concerned here to point out that
although there is in the routine of Animate Nature much

314 THE ISSUES OF LIFE

hunting and being hunted, much devouring and being de-
voured, that is only one side of the picture.

Outside the struggle for existence in the strict sense there
is undeniably a large amount of established self-preservative
routine, but there is at least an equally large amount of
established race-preservative routine. Our total impression
must do justice to both sets of facts. And within the bounds
of the struggle for existence in the strict sense there are
many modes, some not strictly competitive at all. The
struggle which Nietzsche saw in Nature and condescended
to approve of, was not a scramble of starvelings around the
platter of subsistence, but the elbowing and jostling of
masterful individualities; and we maintain that much of
this quality of insurgence is familiar to the field naturalist.
But apart from elbowing and jostling, and apart from in-
ternecine competition and sanguinary combats, there is much
of the struggle for existence which might often be quite
accurately called the endeavour after well-being, and much,
as Darwin emphasised, which may be described as self-sub-
ordinating experiment and effort to secure the success of
the offspring.

SUMMARY.

Some students of the tactics of Animate Nature have discerned in
them little to admire and less to imitate. Huxley and James are
here in agreement. Others, such as Geddes and Kropotkin, have
discerned a materialised ethical process. The discrepancy is partly
due to focussing attention now on * hunger ' and again on ' love ',
now on ' egoistic ' and again on ' altruistic ' activities, now on self-
preservation and self-increase and again on race-continuance and
eugenic success. Both sets of facts must be kept in view.

The twofold business of living creatures is caring for self and
caring for others. Hunger and love, in the widest sense, form the
subject and the counter-subject of the great fugue of life. In satis-
fying these imperious primal impulses the organism encounters

THE ISSUES OF LIFE 315

obstacles, and the inmost secret of life, from first to last, is en-
deavour. The perennial problem is to adjust relations between the
self-expression of the organism and the indifference, or hostility,
or conflicting interests in its environment.

All the fresh reactions and responses which living creatures make
to environing difficulties and limitations are summed up in the
Darwinian concept of the Struggle for Existence which has suffered
from widespread misunderstanding. As is well known, the three
main difficulties are those involved in the tendency to over-popula-
tion, in the nutritive dependence of one creature upon another, and
in the changefulness of the environment. As is also well known, the
struggle takes three main forms, between fellows of the same kith
and kin, between foes of entirely different kinds, and between
organisms and their inorganic surroundings. But what is less
clearly recognised is that the struggle need not be directly competi-
tive, need not be sanguinary, need not lead to elimination there and
then, and that it is often more accurately described as an endeavour
after well-being. The race is not always to the swift, nor the battle
to the strong, for, as Darwin clearly recognised, survival may be the
reward of those who give the best send-off to their offspring, or to
those who vary most in the direction of self-subordination.

Corrections of the idea that the struggle for existence is neces-
sarily an internecine competition between kin around the margin of
subsistence (of which there are remarkably few good illustrations)
have been offered by Spencer, Kessler, Geddes, Drummond, Kropot-
kin, and others. And Darwin safeguarded himself carefully. In-
stead of opposing " Struggle for Self " and " Struggle for Others ",
or " Mutual Struggle ' ; and " Mutual Aid ", it is scientifically
clearer to recognise that the concept of Struggle includes all the
reactions and responses which individual organisms make in face
of difficulties. Intensifying competition is one mode, an elabora-
tion of parental care is another, an experiment in parasitism is
another, a new departure in sociality another, and there are many
more all of which pay. Thus the nightmare picture of the Strug-
gle for Existence as " a dismal cockpit " gives place to a more ac-
curate one, which is more conformable with the assumption that
Nature is not " all weather r> or " a moral multiverse ".

The competitive form of the struggle for existence is not illus-
trated when all the members of a species meet a familiar difficulty
with equal effectiveness, the capacity for the response being in-
grained in the constitution. But it is interesting to turn to these

316 THE ISSUES OF LIFE

securely established ways, to see how large a proportion of th*>
energy and time at the disposal of living creatures is spent in activi-
ties which make not for self -increase, self -stability, or self-preserva-
tion, but for the welfare of the family, the kin, and the species.
Neither naturalists nor philosophers have adequately realised the
extent to which there is throughout Animate Nature a subordination
of the individual to the species. Survival is often the reward of the
individualistic competitor, but not less frequently of those with a
capacity for self-forgetfulness.

There is little in common between the Darwinian struggle for
existence and human warfare. Modern nationalities are not com-
parable to individual organisms. Even if the analogy were closer
it would afford no biological justification for war, for natural selec-
tion in the struggle for existence results only in the survival of the
relatively more fit to given conditions.

LECTURE X.
ADAPTIVENESS AND PURPOSIVEKESS.

LECTUKE X.
ADAPTIVENESS AND PURPOSIVENESS.

1. Animate Nature Abounds in Adaptations. 2. Their Origin
neither by Design nor Mechanical. 3. Is There ( Purpose '
in the Inorganic Domain? 4. Purposefulness and Purposive-
ness in Human Behaviour. 5. Purposiveness and Purpose-
fulness in Animal Behaviour. 6. The Purposelikeness of the
Ordinary Functioning of the Body is Covered by the Concept
of Adaptation. 7. Provisional Conclusion and Anticipation.

OUR survey of the Realm of Organisms as it is affords
evidence in support of the following propositions: (1) that
living creatures are individualities standing apart from
things in general and not exhaustively described in mecha-
nistic terms; (2) that their lives abound in behaviour with
a psychical aspect; (3) that there is in Animate Nature
a prevalence of orderly systematisation, balance, and smooth
working; (4) that there is a pervasive beauty both hidden
and revealed; and (5) that a very large proportion of the
time and energy at the disposal of organisms is devoted to
activities which make not for self-maintenance and self-
aggrandisement, but for the continuance and welfare of the
race. In fact, we find in Animate Nature far-reaching
correspondence to the ideals of the True, the Beautiful, and
the Good correspondences which may suggest to some a
possible line of development for Natural Theology.

1. Animate Nature Abounds in Adaptations.

A survey of the realm of organisms affords another great
impression and that is the prevalence of adaptations. The

319

320 ADAPTIVENESS AND PURPOSIVENESS

narrowest hinge in my hand puts to scorn all machinery";
the hand as a whole is the subject of a Bridgewater Treatise.
The Vertebrate eye is extraordinarily well adapted, in spite
of the instrumental imperfections which Helmholtz discov-
ered. The functional correlations of internal organs such
as heart and lungs are as effective as they are delicate. The
flat-fish is so adaptable in its coloration to the pattern of
the sea-floor on which it rests that it has practically a Gyges
ring, making itself invisible, sometimes almost instantane-
ously. Flowers and their welcome insect-visitors are suited
to one another as glove to hand. The realm of organisms
abounds in adaptations, some extraordinarily perfect, some
in process of becoming perfect.

First there are the structural adaptations of the organism
some with internal and some with external reference,
some static, some dynamic. The internal structure of a long
bone or of the stem of a plant is suited in detail to stand
the strains and stresses to which it is exposed. The same
quality of architectural stability may be seen everywhere
from the scaffolding of a siliceous sponge like Venus's Flower
Basket to the spine of a sea-urchin, from the spirally twisted
encasement of an arenaceous Foraminifer to the prismatic
structure of the enamel of our teeth.

Less static are the adaptations of parts that move and
work. The adaptations of a bird's skeleton for flight and
for bipedal progression are many and thorough. The heart
is a masterpiece of fitness, and in many cases, as in the
antelope on the plains or in the ptarmigan on the high moun-
tains, there are interesting special adaptations of the heart
to stand special strain. The delicacy and complexity of the
mouth-parts of such insects as mosquitoes may well evoke the
artificer's admiration.

ADAPTIVENESS AND PURPOSIVENESS 321

Of great interest are the co-ordinating functional adjust-
ments which secure smooth working. A fine example is the
heat-regulating arrangement or thermotaxis of birds and
mammals, which adjusts the production of animal heat so
as to meet the loss. Superimposed on this, as it were, are
the special adjustments which bring about winter-sleep in
hibernating mammals. And there is no internal regulation
more worthy of our admiration than the manner in which
the mother-mammal is functionally prepared for the ante-
natal development of the offspring and its nurture after birth.
The adaptive regulatory role of the internal secretions is
one of the most fascinating chapters in modern physiology.

Inexhaustible, again, are the illustrations of the manner
in which living creatures are adapted to the particular con-
ditions of their life. The mole, living underground, is
adapted in its short vertical fur and in the absence of an
ear-trumpet to the reduction of friction in burrowing; its
hand has become an extraordinary shovel and its shoulder-
girdle and associated musculature are powerfully developed;
the minute, imperfectly developed eye is good enough for
what is required of it, and it is hidden by hair so that it
does not get rubbed and become a source of weakness; and
so the zoologist goes on.

We may also refer to the theoretically very interesting
inter-organismal adaptations. These may be between or-
ganisms of the same kind, between parent and offspring,
between male and female. Even the male parent may be
adapted to the offspring as we see in the pouch of the
sea-horse, and in the still more striking case of the ISTew
Guinea fresh-water fish called Kurtus, where a hooked bony
process grows from the top of the male's head at the breed-
ing season and serves for the suspension of the bunch of

322 ADAPTIVENESS AND PURPOSIVENESS

eggs. The young marsupials are born prematurely and can-
not even suck ; the mother places them in her external pocket
of skin and has a special arrangement for forcing the milk
into their mouth. They meet this, so to speak, with a special
adaptation that prevents the milk going down the wrong way.

There are also inter-organismal adaptations between crea-
tures of different kinds, of which the crowning examples
are to be found in the way certain flowers and certain in-
sects are suited for making the best of one another. Very
striking also are the numerous mutually helpful associations
which have been established partnerships, commensalism,
and symbiosis, in which there is sometimes two-sided adapta-
tion. The case is repulsive, but the parasite is often adapted
to its drifting life of ease and to making much of its host,
which, in turn, is often adapted so that it hardly suffers
at all from its guest. In the mimetic resemblance of one
creature to another there is again adaptation, often of almost
incredible subtlety.

In Lido-Pacific crabs of the genus Melia a delicate sea-
anemone is often carried on the forceps, and probably serves
to paralyse the crab's prey with its batteries of stinging
cells. It is quaintly suggestive of a tool, and its occasional
absence shows that it is not vitally necessary. But the part-
nership or commensalism is probably of very old standing,
since the denticles of the forceps are elongated into needles
which are adaptively suited to keeping a firm grip of the
' tool '.

We are accustomed to the idea of adaptations, but perhaps
we are not sufficiently appreciative of their nicety. When
winter sets in, the North American ruffed grouse puts on
snow-shoes a row of projecting plates on each side of each
toe so that the bird can tread on the loose snow without

ADAPTIVENESS AND PURPOSIVENESS 323

i

sinking in. The African egg-eating snake, Dasypeltis, has
very few teeth and it would not be profitable to crack the
eggs in its mouth; the egg slips intact into the gullet, where
it is met by the sharp points of the inferior spines of a
number of vertebrae. These project into the gullet and cut
the egg-shells, so that none of the precious food is wasted.
The spines are said to be actually tipped with enamel, the
hardest of all tissues. The empty broken egg-shells are
always returned.

An adaptation that gives us pause is the ' egg-tooth '
found at the tip of the bill in many young birds, and used
by them to break a way through the imprisoning egg-shell.
It is a hard thickening of horn and lime at the tip of the
bill, and since it develops before the horny ensheathment
of the beak it may be a residue of a very ancient scaly
armature in Reptilian ancestors of birds. Be this as it
may, the instrument is an effective one and it is used only
once! What happens is this: the young bird ready to be
hatched thrusts its beak into the air-chamber that forms
at the broad end of the egg; air rushes down the nostrils
and fills the lungs for the first time; in the exhilaration
of this first breath the unhatched bird knocks vigorously
at the shell and breaks open the prison doors. After a few
days, in most cases, the egg-tooth, having done its work, falls
off, a well-adapted instrument that functions only once.

But there is a further detail which is of much interest.
The bill and its egg-tooth are only the instruments; what
about the musculature which works these ? Prof. Franz
Keibel has inquired into this in the case of the unhatched
chick and duckling. He finds that the work is done by a
muscle called the musculus complexus, and that this is very
markedly hypertrophied for some time before hatching. On

324 ADAPTIVENESS AND PURPOSIVENESS

the tenth day after hatching, it shows no peculiarity. Here,
then, we have a simple instance of the way in which de-
velopment proceeds as if it were working with a purpose.
How comes that musculus complexus to be temporarily ex-
aggerated in strength, in relation to the breaking of the egg-
shell, an action which only occurs once in each generation ?

The idea of adaptation is sometimes held far too nar-
rowly, and a needless difficulty is made over the fact that
some specific characters are not known to be adaptive to any
particular condition of life. But, in the first place, some
characters supposed at first to be quite indifferent have
been shown, after closer acquaintance with the creature, to
be finely adaptive. And, in the second place, an organism
is not a system of pegs on which a hundred i characters ?
are hung, it is a harmonious unity, viable and persisting
in virtue of its subtle internal equilibrium as well as in
virtue of the adjustment of its tout ensemble to the condi-
tions of life. Adaptation may have an internal as well as
an external reference.

Beyond particular instances of organismal adaptation, we
have the broad fact that in a given association of organisms
a balanced modus vivendi is arrived at, a compromise be-
tween competing interests, so that the system persists and
works smoothly. The balance of nature is the largest of
all adaptations. Just as the Sy sterna Naturae of the tax-
onomist the orderly classification of the classifier speaks
of rationality; so the vital systema naturae which the nat-
uralist discloses is also a cosmos. There is a systematisation
or co-ordination of lives, world-wide in its scope, and becom-
ing ever more subtle in its accomplishment.

ADAPTIVENESS AND PURPOSIVENESS 325

2. Their Origin neither by Design nor Mechanical.

Opposite the title-page of Darwin's Origin of Species,
there is a quotation from one of the Bridgewater Treatises.
A judicious quotation it is, but, as Professor Lovejoy points
out, there is a historic irony in finding it at the outset of
a book which was the death-sentence of the kind of arani-

o

ment most characteristic of the treatises in question. Darwin
sought to show that, if copious variability be granted and
abundance of time be allowed, then Nature's sifting the
process of Natural Selection will account for all the strik-
ing adaptations from which many thoughtful observers had
been wont to argue directly to theism. He says himself:
" The old argument from design in nature . . . which
once seemed to me so conclusive, fails, now that the law
of natural selection has been discovered. We can no longer
argue that, for instance, the beautiful hinge of a bivalve
shell must have been made by an intelligent being, like the
hinge of a door by man. There seems to be no more design
in the variability of organic beings, and in the action of
natural selection, than in the course which the wind blows."

Now we cannot return to any crude form of the old idea
that the thousand and one adaptations of organisms, which
gratify our sense of fitness, are the direct outcome of the
design of a divine artificer. It is agreed that they have
been more or less gradually evolved by the operation of
natural factors. They have been wrought out in what is
often called Nature's workshop.

On the other hand, we cannot accept Darwin's statement
that the evolution of adaptations is comparable to the work
of the wind among the snow-drifts. The inadequacy of the
statement is fourfold.

326 ADAPTIVENESS AND PURPOSIVENESS

(1) The raw materials of adaptations are variations or
mutations the precious idiosyncrasies of structure and func-
tion that are continually cropping up, that keep the realm
of organisms on the move. Some of these variations may
be accidental and some necessitated, but of many, especially
those which may be called ' new departures ', all we can
say is that they arise, apparently from within the arcana
of the germ-cells. They look like expressions of inherent
creative spontaneity, like experiments in self-expression.
And it must be remembered that a germ-cell is not an
ordinary cell, but a condensed implicit individuality, rich
in the gains of the past, rich in possibilities for the future,
a psycho-physical being telescoped down. In any case,
while our ignorance of the origin of variations remains, as
in Darwin's day, profound, there is no reason why the
argumentum ad ignorantiam should favour mechanistic in-
terpretation. The fact is that we cannot at present give
a mechanical account of the origin of the crop of variations
from which Nature's weeding removes the tares. We always
reckon without our host in Biology when we leave life out.

(2) An important idea, which we cannot at present elab-
orate, is that the variations or new departures which take
hold must not be inconsistent with the already established
organic architecture. Just as the architect or the crystal
must build congruently, so the varying organism must not
contradict itself. The novelty must be in keeping or har-
mony with what has preceded, with what has already jus-
tified itself as fit. There are very few monsters to be seen
in wild Nature, for they express a contradiction in terms
and cannot live in natural conditions. Nay more, very
few monsters ever appear in wild Nature, for the germ-cell
must be a viable unity, and even in its experiments it is

ADAPTIVENESS AND PURPOSIVENESS 327

controlled by the past to hold fast to that which is good.
It is a very interesting fact that some monsters have been
experimentally produced by disharmonious mongrel fertilisa-
tion of egg-cells.

(3) It is admitted that one of the characteristics of ' Na-
ture's workshop ' is the number of automatic arrangements.
In making a machine an artificer literally selects; in estab-
lishing a breed of animals Man literally selects ; but Natural
Selection is a metaphorical term, the sifting is very largely
automatic. The survivors survive automatically in virtue of
the possession of certain advantageous qualities; the elim-
inated disappear automatically because of the absence of
certain advantageous qualities or the presence of others that
are fatal. But this is not the whole truth.

The selection that occurs is not haphazard; it bears some
relation to the previously established external systematisa-
tion which we call the web of life, just as social criticism
which makes it difficult for the unreliable to get on is not
haphazard, but bears some relation to previously established
traditions and standards. The elimination in either case
is remote from fortuity or capriciousness. It always has,
of course, an immediate reference to the present and not to
the future; but the present has been determined by a past
selection of the fit and embodies that selection in an ob-
jective sieve of great subtlety. Since the sieve is a sys-
tematisation of fitness, it tends to sift towards fitness in
the future as well as in the present unless, indeed, the
conditions of the future should greatly change.

Let us repeat this argument. There is in each case a
line of evolution that pays ; it has been reached by past varia-
tions ; new variations that are congruent with the past are
on the whole most likely to appear and to catch on; there-

328 ADAPTIVENESS AND PURPOSIVENESS

fore a variation may have a prospective value. Moreover,
the external systematisation which forms the sieve is the
embodiment of the results of ages of sifting. Therefore for-
tuitousness dwindles away. Sir Ray Lankester is inaccurate
in speaking of evolution as a " chapter of accidents ".

(4) Again, we must bear in mind that in addition to
varying, organisms often take an active part in their own
evolution. They are anything but passive in a game Fate
plays. They may select the environment that suits them,
and play the cards with which variability supplies them.
And this is not automatic. If a change in instinctive be-
haviour (e.g., that exhibited in fashioning a wasp's nest)
be the outcrop of a germinal mutation, it is not likely to
persist unless it is congruent with the previously established
routine, and it is not likely to come to stay unless it pass
muster in the individual apprenticeship when novelties are
tested, an apprenticeship in which, according to some care-
ful students of behaviour, the slender rill of intelligence
is sometimes to be detected even in those creatures most
thoroughly dominated by instinctive equipment.

We see, then, that it is not legitimate to say that a mecha-
nistic description has been given of the establishment of
adaptations, or even to say, without qualification, that they
have been turned out automatically in the workshop of Na-
ture. Darwin's comparison of the process to the work of
the wind expressed an error of judgment, for the blowing
of the wind is altogether mechanically necessitated, and we
cannot admit that this is true of organic evolution where
individuality exists and counts.

But let us suppose that we have made some mistake in
cur argument, and that evolution is more, not less, automatic
than Darwin believed. What then? We look with great

ADAPTIVENESS AND PURPOSIVENESS 329

satisfaction at a contrivance like a linotype printing machine,
or a monorail engine with its equilibrating gyroscope, or
at a watch (had not Bridgewaterism made us tired of it) ;
they all show much skill on the part of the artificer the
original artificer at least. If we were told, however, that
the contrivance we admire was not made by an artificer
at all, but was turned out by an automatic machine, our
admiration would simply be shifted to the designer or artif-
icer of the original automatic machine, and we should ad-
mire all the more if the original device was very simple.
So in Biology, the basal fact remains that organisms have
had, and still have, the capacity of evolving adaptively.
They have it in virtue of certain intrinsic qualities, previ-
ously discussed, which are much more striking than ready-
made fitnesses. It is because living creatures are irritable,
persistent, registrative, variable, and so on, that they have
been able to evolve in a consummately adaptive way. This
was, of course, what Charles Kingsley had in mind in his
immortal child's-story when he put into the mouth of Mother
Carey the words : " I make things make themselves." This
is a very different view, it must be remarked, from that of
an infinite regress of automatic machines, with no original
designer at all; for this does not seem to us to be a clearly
conceivable idea.

Time was when the multitudinous fitnesses of Animate
Nature were the subject of admiring wonder, but this has
shrivelled. Surely, however, the loss of wonder is not alto-
gether creditable. If an adaptation is wrought out gradually
by a co-operation of factors, that is just as wonderful as a
special creation at the hands of a divine artificer; and
it is more intelligible. And even if the process of evolving
adaptations should turn out to be more automatic than it

330 ADAPTIVENESS AND PURPOSIVENESS

seems to us to have been, it remains very wonderful that
living creatures should be so adaptable, should have so rich
a capacity of supplying the raw materials for adaptations.

3. 7s There 'Purpose' in the Inorganic Domain?

Leaving in the meantime the fact of almost universal
adaptiveness in the realm of organisms, let us turn to the
difficult problem of purpose. In the inorganic domain we
see the river carving its course in the rock, the wind blowing
the snow into beautiful wreaths, the various weathering proc-
esses making scenery, but these results are not adaptive to
a future, and keeping to things as they are, we feel no reason
to speak of purpose. The concept of purpose is irrelevant
in the domain of the inorganic where there are no individu-
alities and no alternatives, but rigorous concatenation and
mechanical necessitation everywhere.

The hylozoist beholding the stream, flowing like an endless
snake, may point to its enduring purpose. It sweeps some
obstacles away and patiently undermines others ; it bides its
time with patience and overflows what it cannot circumvent ;
it consents to sinuous meanderings, and then, on a day of
flood, cuts off a huge salient; it will even submit to an
apparent death, becoming an underground current, if it may
thereby accomplish its end of reaching the sea. But this
remains fanciful and unconvincing: the stream is not a
very long snake nor an individuality in any sense, it has
no alternative in anything it does ; it is not in the true sense
an agent.

Two saving clauses are necessary. It is obvious that the
inorganic domain is not chaotic, nor incoherent, nor ineffec-
tive. But it is without endeavour. It is orderly and stable,
made to last, able to assume forms of great beauty, with

ADAPTIVENESS AND PURPOSIVENESS 331

an interesting tendency to complexify under certain condi-
tions, but it does not reveal any resident operative purpose.
It will be understood that by ' purpose ' in this discussion
we mean intention, conative endeavour, anticipation of an
end. We are not taking account of the employment of the
word to denote use or efficiency, as when people say that
the purpose of the elephant's trunk is to be a hand, or that
a man worked to good purpose.

The other saving clause is, that we are not at present
raising the question of the part that the inorganic has played
in the world-wide genetic process in making organisms pos-
sible, and still plays in affording a basis for, and an oppo-
sition to the activities of organisms and personalities. The
way in which a cradle and a home for organisms was made
" when as yet there was none of them ' is very remarkable
(see Henderson, The Order of Nature, 1917), and will en-
gage our attention later on. This may point to there hav-
ing been a purpose in the institution of Nature, but not to
there being a resident operative purpose in inorganic trans-
formations.

4. Purposefulness and Purposiveness in Human

Behaviour.

The other pole is to be found in human affairs, where
purposefulness dominates. When we give time and energy
to some scheme or cause, we know that what we do is actu-
ated by a clearly conceived purpose. No one can make sense
of our life who does not recognise this, even if he call it
the method in our madness. An anticipation, an ideal, with
an associated tension of endeavour and glow of feeling, does
as a matter of fact rule our will on many occasions. If
this conceived purpose is not real, " with hands and feet ",

332 ADAPTIVENESS AND PURPOSIVENESS

we may abandon the possibility of either philosophy or
science. Our life is at its highest efficiency when it is
most dominated by purpose, when there is least of " the unlit
lamp and the urigirt loin ".

At a slightly lower level, however, we recognise analogous
facts. We prepare for months to build a rockery in our
garden, collecting stones and tree-roots and such like in
a way that perplexes our next-door neighbour, who is not
in the secret, who shakes his head at the absence of purpose
in our behaviour. But all that we do is actuated by a pur-
pose, so simple that we may call it perceptual, to form in
the outer world an actual counterpart of a pleasing picture
which had formed itself, as we say, in our mind. If this
perceived purpose is not real, nothing is real. A mental
anticipation with its associated desire determines our be-
haviour.

We feel no difficulty in the fact that the curious can
give, if he will, a tolerably complete physiological account
of our various activities in making the rockery the collect-
ing, the carrying, the digging, and the building. For we
know that however complete such an account may be either
at the chemico-physical level, or at the physiological level,
it never comes near being a complete scientific account until
it recognises the end which serves " as a point of connection
for a plurality of causes ", something which cannot be
measured or weighed the vision of the rockery as desira-
ble. Not only may a teleological interpretation be put
upon our behaviour; it musi be put upon it, if we are to
give a scientific description.

There are many difficulties in our way when we begin
to draw conclusions as to the purposes of others, but there
is certainty in regard to our own. We have direct experi-

ADAPTIVENESS AND PURPOSIVENESS 333

ence of a clear outlook towards the future, of making plans,
of desiring ends, of deliberately willing to realise an idea,
of bending a multitude of means, often with some difficulty,
towards a definite result, and so on. We cannot think of
it without the concept of purpose. It is not merely that
we put this finalistic interpretation on our conduct ; we
know that our purpose actuates our conduct. Among the
conditions of our conduct we recognise ideal anticipations
as dominant. As Lloyd Morgan puts it, there are psycho-
logical factors which we name " prospective significance and
interest ". " Pre-perceptive relationships have been estab-
lished and highly developed. And such conscious relation-
ships count, really count, every whit as much as any other
natural relationship. They are not merely epiphenomenal
phosphorescence; they are real conditions of the course of
the process, both mental and bodily."

We must admit, then, the reality of purposeful self-de-
termination. It is not that a psychical entity, called a pur-
pose, functions; it is rather that our whole organism bends
its bow in a particular direction and that we know this on
the experiencing side as our conscious purpose and strengthen
it in knowing it. Wo see, then, that in the human realm
of ends the concept of purpose is essential ; that in the in-
organic domain, considered in itself, it is irrelevant; the
question is as to the intermediate realm, and here the diffi-
culties of interpretation are great.

This question of purpose is more or less clear when we
are dealing with ourselves, but it becomes much more diffi-
cult when we pass to our neighbours. One of our neighbours
behaves as we were doing and we credit him with the pur-
pose of making a rockery. But it may be that he has some
other purpose in view, or it may be that he is simply imitat-

334 ADAPTIVENESS AND PURPOSIVENESS

ing us with a confidence that the result will be worth having.
If there is this possibility of misinterpreting purpose within
our own species, how careful must we be when we pass to
animal behaviour.

We see a crofter making, year after year, a long line
of the stones he has gathered from his field. We infer that
he is arranging them so as to be least inconvenient. But
one day he digs a trench beside the line and begins to lay
the biggest blocks solidly within it. We know that he is
going to build a wall. Now it is quite possible that this
purpose was not in his mind when he began, and did not
arise until the line of stones reached certain dimensions
or until his clearance gave him a little leisure to think of a
further improvement. This idea of an increasing purpose
seems to be of great importance in Natural History, where
a secondary end often appears to grow out of a primary
one.

We inferred that the crofter was building a wall because
we could not make sense of his activity on any other assump-
tion; we argued by analogy from our own experience; and
if we knew his language we could verify our interpretation
by asking him what he was working towards. He would
tell us that he had been working intermittently for years
because he had the purpose of building a wall. The thought
of the future wall was something actual which moved the
crofter to will and to do. The thought and the will were
in a real sense the ground of necessity of the wall, not less
real than the stones.

But the convincingness of our interpretation of the crofter's
actions as the outcome of his purpose rests, we must admit,
on our recognition of him as a fellow-countryman, on his
own assurance, and on parallels between his behaviour and

ADAPTIVENESS AND PURPOSIVENESS 335

endeavours within our own experience. How careful we
must be in regard to the purposefulness of animals who are
very distantly related, whose language if they have any
we do not know, whose behaviour is cast on different lines
from ours.

When we see a blacksmith take a twisted shoe from a
horse's foot, heat it in the fire, hammer it, cool it, file it,
and so on, we know from the very first what his purpose
is, and we understand more or less every step in relation
to the obvious end. But if we watch a potter or a glass
blower or the like for the first time we find it more difficult
from what we see to prove that he is not amusing himself;
he does things that we do not see the meaning of; he ends
just at the last moment by turning out something which
we did not expect. There is here the warning that a sequence
may be actuated by purpose through and through although
we do not recognise the domination not even when we know
the end.

5. Purposiveness and Purposefulness in Animal

Behaviour.

Let us pass to animal behaviour. When a dog hides an
unfinished bone in a very unusual place ; when Lord Ave-
bury's dog Van goes to its box and brings out and arranges
the letters T-E-A; when rooks take fresh-water mussels to
a great height and let them fall on the shingle beneath so
that they are broken; when a mother weasel, accompanied
by one of her offspring, about to be overtaken on the links,
seizes the youngster in her mouth, dashes on ahead, and lays
it in a sandy hole ; when beavers cut a canal right through
a large island in a river ; when mares, some past foaling,
unite to lift up between them a number of foals on the

336 ADAPTIVENESS AND PURPOSIVENESS

occasion of a great flood, and so on, we say, with probable
accuracy, that the creature was actuated by a definite pur-
pose, by some sort of intention, by some anticipation of an
end. The validity of this undemonstrable conclusion de-
pends (1) on the need of assuming some degree of purpose
as the connecting thread which binds together the series of
acts, and (2) on what we know in other ways of the creature's
psychological analogy with ourselves. If the acts composing
the chain are discontinuous, the need for postulating a bond
of purpose is particularly evident. If the creature has a
fine brain at a high structural level, as we know to be the
case with dogs, horses, elephants, and the like, the legitimacy
of inferring an actuating purpose is the more probable. It
may well be that the purpose is not of the same nature as
our purpose when we begin a day with the intention of
economising our energies at every turn for a difficult task
to-morrow, or of converting as many people as possible to an
acceptance of methodological vitalism. It may be that the
animal's ' purpose ' is only a concrete picture with an asso-
ciated desire, a cognitive disposition at a perceptual level
and an associated conative disposition. So it is sometimes
in mankind, especially in childhood. But it will still be
legitimate to describe the behaviour as purposeful, though
the purpose was not a conceived purpose. For we mean by
purpose an intention of the organism, involving a perceptual
or conceptual anticipation of a desired end.

Difficulties in making sure that an actuating purpose is
at work begin whenever we pass from ourselves to our
neighbours ; they increase when we pass to big-brained higher
animals ; they go on increasing when we pass to cases like
that of a bird building a nest. The bird goes through a
certain routine of collecting and interweaving materials,

ADAPTIVENESS AND PURPOSIVENESS 337

of lining the interior with feathers there may be over two
thousand of them, of covering the outside with lichens
which make the nest almost invisible on the bough. There
is no doubt as to the adaptiveness of the chain of acts ; it
seems clear that the work is without justification until it
is finished ; we cannot make sense of the prolonged activity
unless we see the whole in the light of the final result which
is of great value to the individual bird, to the nestlings, and
to the species in question. But we are no 'longer so certain
that the bird's behaviour is actuated by perceived purpose.
We may know, for instance, that the bird never made a
nest or laid an egg before; we know that there is a remark-
able rigidity in the routine which sometimes detracts from
its effectiveness; and that there are occasional aberrations
which suggest that the bird is not quite on the spot. In
other words, we are watching an instinctive routine with a
spice of intelligence. How far are we warranted in saying
that it is actuated by purpose? Can there be purpose which
is not clearly perceived ? We propose to rank all such cases
under the rubric ' purposiveness '. It implies in the bird's
case a determined endeavour, obedience to an inborn inspira-
tion modified by intelligence, but we are not sure how far
the end is in view.

Returning to the observations of Prof. J. B. Watson and
Dr. K. S. Lashley on homing terns, we have to interpret such
facts as these. A number of brooding terns are conveyed in
hooded cages on board ship for over four hundred miles
from the nesting island ; they are liberated in the middle
of the sea beyond all hint of land ; they set off at once for
home against a head wind ; some of them reach home safely.
How they succeeded we do not know; whether they are in-
fluenced by magnetic currents and the like we do not know;

338 ADAPTIVENESS AND PURPOSIVENESS

but this we do know, that they are going back to their nests.
The nesting impulse remains strong for two or three weeks,
and this gives an illuminating significance to the homing
of these sea-swallows. They are returning to activities in
which their life reaches its climax, to the continuance of
which they are urged by a deep organic impulse, by an
irresistible will which is not readily baulked.

But difficulties increase when we pass to the field of purely
or predominantly instinctive behaviour among animals i of
the little brain type ', such as ants and bees. We see numer-
ous acts dovetailed in a series, correlated in a definite se-
quence which leads to a useful result. We cannot make the
behaviour intelligible without saying: " Somehow or other
these several acts have been concatenated in relation to an
end." But in what sense can we say that a bee on its
first honey-collecting expedition is actuated by a purpose ?
We dare not suppose a conceived purpose and we cannot
clearly think in this case of a perceived purpose, for the bee
is operating effectively in a world previously unknown to it.
What kind of purpose can there be? We shall speak of
instinctive purposiveness, differing from perceptual purpose-
fulness in the probable absence of any clear vision of the
end.

Here we have to include the extraordinary cases where the
individual works resolutely towards a goal which it never
experiences. Many Digger-wasps, for instance, make elab-
orate preparations for offspring which they never survive to
see. Since social wasps are geologically ancient it is reason-
able to suppose that their behaviour originated in the distant
past when the ancestors of our present-day species did survive
to see their progeny. Originally, on this supposition, whether
the primitive behaviour arose as an intelligent new de-

ADAPTIVENESS AND PURPOSIVENESS 339

parture (as some would say) which was hereditarily added
on to the instinctive patrimony of the race, or arose as a
germinal mutation (as we would say) which was intelligently
tested and approved of in the individual lifetime, it is not
far-fetched to suppose that it was justified to the individual
in some measure of satisfaction. The mothers saw their
children, which is more than they do now.

The difficulty is to understand the present-day implicit
obedience to the voice of the distant past, to see how an
elaborate piece of instinctive routine which does not justify
itself to its possessor can retain its imperious inertia through
the ages. Probably some sop unknown to us is given to
the individual's interests and satisfactions. It may be, for
instance, that parental instincts have become in some cases
linked on to conjugal instincts, reverberations of which
continue to give meaning and interest to parental care whose
reward is nowadays never experienced. But the problem
of making for an unseen goal is a very difficult one.

Since this was written our suggestion of an individual
' sop ' has been strikingly confirmed by the observations of
Roubaud and of Wheeler. For certain tropical wasps
Roubaud has shown that the queens and workers receive from
the grubs, which they assiduously tend and feed, small quan-
tities of a secreted elixir of which they are extraordinarily
fond. For certain kinds of ants Wheeler has shown that
there is a similar give and take (trophallaxis) between the
workers and the grubs. The workers feed the grubs with
chewed flesh, but they receive from their charges a douceur of
secretion which seems to keep them in good heart.

But we cannot draw a line at instinctive creatures like
ants and bees, where the complexity of the brain gives us
some warrant for postulating ideational processes. There

340 ADAPTIVENESS AND PURPOSIVENESS

is hardly less effective purposelike behaviour in animals
with no nerve-ganglia at all. Our typical case, already
described, is the struggle between the brainless starfish and
the brainless sea-urchin. Here we have a long series of
difficult operations, not in the line of least resistance, not
habitual, not a sequence of tropisms or reflexes, but a cor-
related behaviour-chain. Can we avoid saying that the star-
fish shows endeavour? We do not dream of calling it pur-
poseful, but is it in any way purposive ? We have to remem-
ber that the starfish has no nerve-ganglia. It has diffusely
scattered neurons, a line of them up each arm, and a pen-
tagon uniting these lines around the mouth. But there is
no concentration into ganglia, and therefore we must be very
parsimonious in our use of mental terms. We propose to
speak of this sort of purposelike behaviour as illustrating
organic purposiveness, organised endeavour.

Summing up to this point, we find that a modicum of
purpose or intention is to be recognised over a very wide
range, that it is a vera causa that counts, that we are not at
liberty to take it or leave it, that it must enter into the
scientific description. It probably represents in all cases
an organismal summarising of past experiences in such a
way that a definite endeavour is engendered, and behaviour
is effectively dominated. But it tends to clearness to distin-
guish conceptual purposefulness in man's conduct, perceptual
purposefulness in the intelligent behaviour of man and some
animals, instinctive purposiveness in the routine behaviour
of ants and bees, and organic purposiveness in the controlled
and experimental endeavours of brainless animals, even
in the architectural achievements of the arenaceous
Foraminifera.

We began with deliberate purposefulness and worked

ADAPTIVENESS AND PURPOSIVENESS 341

downwards; but deliberate purposefulness is a lofty spe-
cialisation of organic purposiveness. Without implying too
hard arid fast boundary lines, we suggest that the word pur-
poseful be kept for actions in which there is conscious antic-
ipation of the constraining end. The common note in pur-
poseful or purposive behaviour is that of the individuality
or total reaction of the organism. When the organism as a
whole works towards a future result which is not immediate,
there is purpose in some form or other. Where the concept
of purpose or intention is applied beyond the category of
individuality there is bound to be confusion of thought, and
care must be taken not to use it to denote the end which a
particular collocation subserves or the utility which any
particular collocation may have in the economy of Nature.

6. The Purposelikeness of the Ordinary Functioning of
the Body is Covered by the Concept of Adaptation.

The organism's behaviour as a whole is fundamentally
purposelike. It makes for self-preservation and race-
preservation in the widest sense. It may, on occasions, ex-
hibit self-determination, selection, and control with reference
to a distant result. In higher animals, purpose probably
operates, as in man, as a cognitive anticipation of the future ;
in lower animals the nervous system is so different that we
dare not argue from analogy as to the degree of awareness
with which the conative bow is bent.

It appears probable that activities originally dominated
by clearly perceived purpose, may, by individual habitua-
tiori or by germinal variation, sink to a lower level of or-
ganised purposiveness. Not only the bending of the conative
bow, but the hitting of the mark, becomes part of the or-
ganisation, it may be part of the inheritance, part of the

342 ADAPTIVENESS AND PURPOSIVENESS

organism's ready-made self. The organism as a whole
hardly requires to keep its hand on the reins, purpose has be-
come implicit. There are disadvantages in this, for the fixity
sometimes leads to quaint mistakes, but it spells economy
and allows more freedom for direct or individual purposive
or purposeful endeavours and experiments. Just as we need
the uniformity of the inorganic domain as a reliable fulcrum
for our efforts, so the uniformity of organised or implicit
purposiveness, besides saving organismal energy, may serve
as a trustworthy stepping-stone to higher things.

When we observe an intricate machine with many regula-
tive adjustments, such as safety-valves, we are impressed
with its efficiency and purposelikeness. But we credit its
maker with purpose, not itself; the concept does not grip.
It is a confusion of thought to speak of a torpedo or a solar
system being actuated by purpose. Only an organism or a
higher form of Being can have a purpose.

Similarly in regard to the smooth working of the organs
of a complex animal and even the orderly development of
the same we are inclined to say that the appropriate term
is adaptive not purposive. The concept of adaptation suffices
for the fact that in ordinary functioning " the whole and the
parts are, as it were, reciprocally ends to each other ". The
harmonious functioning and development are the outcome
of an organisation gradually wrought out through ages and
are exhibited whenever suitable liberating stimuli are pres-
ent. We need not here introduce the concept of actuating
purpose in any form.

But it seems legitimate to lay emphasis on the view which
we have tried to substantiate that the adaptive organisation
did not come about mechanically, that it has behind it a
long history in which germinal variability and organic pur-

ADAPTIVENESS AND PURPOSIVENESS 343

posiveness have played an important part, and that even
when it may be said that variability shuffles the cards blindly,
it is incumbent on the individual to play the game intelli-
gently if it means to win.

Moreover, in the regulatory self-adjustment of the or-
ganism when functioning or development has been badly

disturbed, in the activity, within the body, of independent
mobile elements like phagocytes, in the regeneration of a
lost lens from a tissue which does not normally give rise to
one, we get just a glimpse of a residual organic purposiveness,
though that has been as a whole resigned in favour of very
perfect and thoroughgoing organisation.

What is meant by saying that the organism is essentially
purposive, or that it has an essentially teleological or finalist
aspect? This is meant, that the whole life expresses a ten-
dency to persist, that the whole life is adapted towards self-
preservation and self-expression. And if it be said that
this adaptedness is the outcome of ages of mechanical varia-
tion and selection, the answer is that neither variation nor
selection can be adequately described as mechanical.

7. Provisional Conclusion and Anticipation.

We have been necessarily much concerned with the out-
works, and there remain many imperfectly answered ques-
tions. What, in the world-becoming as a whole, is the signi-
ficance in the largest sense of the inorganic domain in its in-
tricacy and splendour, of the myriads of invisible Protists, of
the hundreds of thousands of plants, of the struggle for exist-
ence, of the prodigious mortality, of the age-long genetic proc-
ess with all its groaning and travailing? To such questions
we shall return in our study of Organic Evolution, conscious
that behind them there loom others If Nature be Nature

344 ADAPTIVENESS AND PURPOSIVENESS

for a purpose, what is that purpose ? If there be design
what does it promise?

The general outcome of the present discussion is an ap-
preciation not only of the pervasiveness of mentality in the
realm of organisms, but of all-penetrating purpose as well.
Looking back imaginatively on the course of evolution, we
have seen the emergence of an aspect of reality which we
call Life, and another aspect of reality which we call Mind,
now we are getting glimpses of the emergence of another
aspect of reality which we call Purpose. Of this we shall
get a larger view when we come to consider the evolutionary
process as a whole.

In the meantime, however, we have gained something.
For while there may be difference of opinion as to terms
and concepts, it has become increasingly clear that animals,
and plants too, are creatures with purposeful or purposive
lives, and are not to be banished from the Realm of Ends.
This enriches our conception of life. It is a contribution
towards a Philosophy of Nature. It makes our view of
Nature and our view of Human Life more conformable.

In any case we trust that our study so far may have con-
tributed to a deeper appreciation of the Realm of Organisms,
in which we are, to say the least, no aliens. AYe have sought
to envisage the variety of life hundreds of thousands of
distinct individualities or species; the abundance of life,-
like a river always tending to overflow its banks; the dif-
fusion of life, exploring and exploiting every corner of land
and sea; the insurgence of life, self-assertive, persistent,
defiant, continually achieving the apparently impossible;
the cyclical development of life, ever passing from birth,
through love, to death; the intricacy of life, every cell a
microcosm; the subtlety of life, every drop of blood an

ADAPTIVENESS AND PURPOSIVENESS 345

index of idiosyncrasies; the inter-relatedness of life, with
myriad threads woven in a patterned web ; the drama of life,
-plot within plot, age after age, with every conceivable
illustration of the twin motives of hunger and love; the
flux of life, even under our short-lived eyes; the progress
of life, slowly creeping upwards through unthinkable time,
expressing itself in ever nobler forms ; the beauty of life,-
every finished organism an artistic harmony; the morality
of life, spending itself to the death for other than individ-
ual ends; the mentality of life, sometimes quietly dream-
ing, sometimes sleep-walking, sometimes widely-awake; and
the victory of life, subduing material things to its will, and
in its highest reaches controlling itself towards an increasing
purpose.

It is something to have found warrant for regarding the
Realm of Organisms as pervaded with active purposiveness.
At a later stage in the argument we shall show that there is
at least a presumption in favour of the view that Nature is
Nature for a purpose an increasing and transcendent pur-
pose. At this stage it seems as if part of that purpose were
the emergence of individuality, mind, freedom, purpose.
This thrilling word purpose, expressing the most real fact
in our personal experience, brings us at this half-way house
to our provisional conclusion which is, we confess, too large
for the premises, that individualities with mind, with free-
dom, and with purpose, cannot be accounted for in terms of
a ground of reality without mind, without freedom, without
purpose. Therefore let us humbly seek after, if haply we
may find, more than the footprints of the Creator, who be-
holding all the works of His hands found them good for
His purpose.

34-6 ADAPTIVENESS AND PURPOSIVENESS

SUMMARY.

Our consideration of the realm of organisms has shown us the
apartness of living creatures and how they transcend mechanical
and dynamical formulation, the important role played by behaviour
with a definitely mental aspect, the pervasiveness of beauty, and
the large proportion of time and energy devoted to activities which
make not for self-preservation but for race-welfare. We find, in
fact, in Animate Nature far-reaching correspondences to our ideals
of the True, the Beautiful, and the Good, which suggest a re-
habilitation of Natural Theology.

Taking a wide sweep we gain another great impression that
of almost universal adaptiveness. Every living creature is a bundle
of adaptations. It matters comparatively little that we are to some
extent able to describe the process by which these adaptations have
arisen (the imperfections of this description to be considered later),
for the basal fact remains that living creatures have had the capacity
of evolving tbus adaptively. The adaptiveness depends on intrinsic
qualities, previously discussed, which are more striking than ready-
made fitnesses.

Adaptations may be classified as: (1) structural arrangements
with internal or external reference, (2) co-ordinating functional
adjustments of a special sort, including regulatory integrations, and
(3) inter-organismal adaptations. The result of the last is a sys-
tematisation or co-ordination of lives, world- wide in its scope, and
often extraordinarily subtle in its accomplishment.

In the inorganic domain we find rigorous concatenation, a domi-
nance of mechanical. necessitation. There are no unique individual-
ities, no alternatives; and the concept of purpose is irrelevant (except
when we are thinking of the significance of the evolutionary trend
as a whole). .On the other hand, in the human realm of ends, ideal
anticipations are dominant. Our conduct implies purposeful self-
determination. There is no difficulty until we begin to consider
the realm of organisms, between the inorganic and the human.

It may be said that the organism as a whole is characteristically
purposive, " a unity in which the whole and the parts are recip-
rocally ends to each other ". It shows some measure of self-deter-
mination; its behaviour is regulatory, selective, controlled; the
activities of its parts are correlated in reference to the preservation
and continuance of the individual and the race. The development

ADAPTIVENESS AND PURPOSIVENESS 347

is also purposive through and through. And if it be said that in
all this the organism is merely obeying its hereditary constitution
adapted to react to an appropriate environment, it must be observed
that this hereditary constitution" is determined by the selection of
variations, many of which seem like experiments in self-expression,
and that all the innate variations are, so to speak, cards which
have to be played by organismal endeavour. This endeavour is ipso
facto purposive and is along the lines of previous play in some
measure selected by the organism.

Passing above what may be called organised purposiveness, we
may recognise instinctive purposiveness, often with its paradoxical
quality of making towards a goal which the individual never ex-
periences. At a higher level, among intelligent animals, it becomes
possible to speak of a perceived purpose an imaging of the end
which has compelling force. Thus we are led to an appreciation
not only of the pervasiveness of mentality in the realm of organisms,
but of the all-penetrating purposiveness as well.