Human evolution is governed by the same factors as brute evolution, and the all-mighty and all-sufficient factor is natural selection on a basis of life and death struggle and survival of the winner. Therefore the whole matter is very simple: that people is the chosen of Nature and God that devotes its best attention and energy to the business of fighting and fights in the most approved brute way with complete rejection of all those unnatural, debilitating and disadvantageous principles that an artificial and weakening form of social evolution has grafted on to human life. For this social evolution that the human species has adopted is based on a principle that is in direct conflict with nature, the principle of mutual aid and altruism. Nature's principle is mutual fight and antagonism. Thus said Weismann and his Neo-Darwinian followers; and thus quickly repeated the men who saw in this philosophy exactly the needed foundation and sustaining pillars for their own militaristic philosophy. In this fundamental natural philosophy they found exactly what they needed to give their militarism full acceptance among the German people; namely, the cold, disinterested support of science, the potent aid of scientific dogma. For Science is the German religion. The _Gott_ of the German Kaiser is a god of steel and power, not of heart and pity. German success, so far as it goes, and of the kind it is, comes in truth from _Gott und uns_; but from their kind of god and their kind of us. I heard the first impressive exposition of this Germanized Darwinism in a great German University twenty years ago, and I heard the second impressive exposition of it only a year ago at the Great Headquarters of the German General Staff in occupied France. This latter exposition was well illustrated by the conditions of the moment--and it was a memorable one for me. Here was the apparently conquering species, pushing into the land of the struggling native species; here was the species longer in tooth and claw, more ferocious and brutal, more unscrupulous and cunning, apparently winning in this biological struggle for existence,--and taking breath and a few moments to explain why. No wonder we win; for we are in tune with Nature. We win because we ought to win for the sake of the future of the human race, for the sake of its evolution in harmony with natural law.