Darwinism met with such overwhelming success because it provided, on the basis of inheritance, the ideological weapons for race and well as class rule and could be used for, as well as against, race discrimination. Politically speaking, Darwinism as such was neutral, and it has led, indeed, to all kinds of pacifism and cosmopolitanism as well as to the sharpest forms of imperialistic ideologies. In the seventies and eighties of the last century, Darwinism was still almost exclusively in the hands of the utilitarian anti-colonial party in England. And the first philosopher of evolution, Herbert Spencer, who treated sociology as part of biology, believed natural selection to benefit the evolution of mankind and to result in everlasting peace. For political discussion, Darwinism offered two important concepts: the struggle for existence with optimistic assertion of the necessary and automatic "survival of the fittest," and the indefinite possibilities which seemed to lie in the evolution of man out of animal life and which started the new "science" of eugenics.

The philosophy of Hobbes, it is true, contains nothing of modern race doctrines, which not only stir up the mob, but in their totalitarian form outline very clearly the forms of organization through which humanity could carry the prerequisite for all race doctrines, that is, the exclusion in principle of the idea of humanity which constitutes the sole regulating idea of international law. With the assumption that foreign politics is necessarily outside of the human contract, engaged in the perpetual war of all against all, which is the law of the "state of nature," Hobbes affords the best possible theoretical foundation for those naturalistic ideologies which hold nations to be tribes, separated from each other by nature, without any connection whatever, unconscious of the solidarity of mankind and having in common only the instinct for self-preservation which man shares with the animal world. If the idea of humanity, of which the most conclusive symbol is the common origin of the human species, is no longer valid, then nothing is more plausible than a theory according to which brown, yellow, or black races are descended from some other species of apes than the white race, and that all together are predestined by nature to war against each other until they have disappeared from the face of the earth.