ENDS AND MEANS
they bring the individual into contact with new groups of
his fellow-men and women, but also because they alleviate
the boredom induced by monotony and the sight of ail-too-
familiar surroundings. (Boredom, as we have already seen,
is one of the reasons for the persistent popularity of war;
any change, whether in the structure of society or in the
structure of the individual personality, that tends to reduce
boredom, tends also to reduce the danger of war.)
I have given only two examples; but many other methods
'could doubtless be devised for multiplying valuable con-
tacts and so transforming the life of every individual man
and woman into an education in responsibility and equal
co-operation.
There are no bridges across the Grand Canyon. Those
who live on opposite sides of the abyss must go down to
the plains in order to find a crossing-place. But between
those who live on the same side, communication is easy*
They can come and go without hindrance, can mingle
freely with their fellows. In other words, men and women
of different types can establish contact with one another
only in action, and only on condition of reciprocal good
behaviour. Men and women of the same type are psycho-
logically commensurable. Communication between them
is, of course, facilitated by reciprocal good behaviour; but
even when the behaviour is bad, even when they dislike
and mistrust, they can understand one another. Cerebro-
tonics who have had the same sort of education can come
together on the intellectual plane. Viscerotonics will mingle
in the loud and expansive good-fellowship which all of
them enjoy. Somatotonics will appreciate each other's
delight in muscular activity for its own sake. And there
are also the smaller sub-divisions. Mathematicians will
associate with other mathematicians. The musician speaks
a language which all other musicians understand. People
with the same kind of eccentric sexual habits meet on the
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