ENDS AND MEANS society; I refer to the field of armament manufacture. A slight change, for example, in the design of internal- combustion engines—so slight as to have no appreciable effect on the numbers of men employed in their con- struction—may bring (and indeed has actually brought) millions of innocent men, women and children a long step nearer to death by fire, poison and explosion. In this case, of course, the problem is not one for technicians; it is a problem that can be solved only when sufficient numbers of men of good will are prepared to make use of the methods by which, and by which alone, it can be solved. For the nature of these methods I must refer the reader to the chapters, on War and Individual Work for Reform. Rises and falls in the birth-rate are likely to produce social changes even more far-reaching than those produced by technological advances. It is about as certain as any future contingency can be that, half a century from now, the population of the industrialized countries of Western Europe will have declined, both absolutely and in relation to that of the countries of Eastern Europe. Thus, when Great Britain has only thirty-five-million inhabitants, of whom less than a tenth will be under fifteen and more than a sixth over sixty, Russia will have about three hundred millions. Will a country so (relatively speaking) sparsely inhabited as the Britain of 1990 be able to keep up its position as a * First-class, Imperial Power'? In the past Sweden, Portugal and Holland attempted to keep up the status of a Great Power on the basis of a population that was absolutely and relatively small. All of them failed in the attempt. If only for demographical reasons, Britain should take all possible steps to avoid a struggle for imperial power which, if not immediately fatal, will almost certainly prove fatal a couple of generations hence. In a militaristic world, relatively, under-populated countries cannot hope (unless protected by more powerful neigh- 54