In this brief investigation of the possible causes of war, it must be understood that what we want to find is what is called a "sufficient reason" for its continued existence. The armament trades may supply the means, the occasion, the stimulant, but their relation to it is not essentially causal. Many writers of another school have attempted to prove that the sufficient reason of war is a beneficent function of which they believe it to be capable. This imaginary function is none other than that of improving the race, and we may admit at once that, if there were the slightest scientific basis for such a belief, the bloodiest war would be morally justified, and it would be the religious duty of every individual to kill as many as possible of his fellows for the benefit of their descendants. But of course modern warfare so far from improving the race must sensibly exhaust it. In ancient Sparta, and generally whenever the conditions of warfare approximated to those of personal combat, courage and the allied characteristics of mental as well as of physical nobility must have had a survival value; whereas in modern warfare which makes for the indiscriminate extermination of all combatants, the result is exactly reversed. Our semi-scientific militarists forget that the "survival of the fittest"[13] is in nature essentially a process of selective elimination; and modern war is a process of inverted selection which eliminates the brave, the adventurous and the healthy; precisely those members of the community who are best fitted to survive, that is to propagate their kind, in the ordinary environment of political life. Conscription, indeed, spreading a wider net than the voluntary system, may be described as an institution for exposing the best citizens of a state to abnormal risks of annihilation. As a matter of historic fact we are told, though I don't know on what authority, that the Napoleonic wars, how much less deadly than our own, reduced by an inch the average height of the French nation. So much, in brief, for the "scientific" justification of war. It is evident that by the eugenic argument war could be defended only if we agreed to send into battle precisely those men whom our recruiting officers disqualify. A good deal might be said, from the sociologist's point of view, in favour of a system of cathartic conscription which would rejuvenate England with a watchword of "The Unfit to the Trenches." FOOTNOTES: [Footnote 13: They usually add to their mental confusion the elementary blunder of using the word "fittest" in a moral instead of in its biological sense.] Sec. 3 Patriotism