The word can have but one other sense, namely, as opposed to artificial. But what is in man artificial and what is natural? It seems that the natural is understood as that which is not the work of human intention and reflection, of labor, and of education. Innate impulses would be, according to this definition, natural. But it is evident that one cannot abandon himself to his blind impulses; society could not exist under such circumstances. Or if it be said that, since all organs and impulses of the human being tend to preservation of the species, and that this must, therefore, be the end, then let us say "the preservation of the species," or "the good of mankind" but not "the natural life," is the end for man to attempt. Nature as a whole is neither good nor bad. Her cruelty in the struggle for life is continuous. Yet this is not "cruelty," in so far as it is not willed. She has often selected the best men for her sacrifices. Yet this is not all that is to be said of the relation of Darwinism to Ethics. The law of natural selection regulates not only the life of the individual but also that of peoples and nations. Evil may arise and prosper in society. But it has no permanent existence. The chances that the descendants of human beings possessing evil characteristics will long survive, that they will not, sooner or later, perish as the result of conflict with the mandates of health, or the laws of the state, or the demands of society, are not great. In the life of nations, it appears more clearly than in the life of the individual, that "Death is the price of sin." Should in any society the opinion gain power that the struggle for existence authorizes or demands a regardless pursuit of one's own interests, an oppression and robbery of the weak by the strong, an annihilation of pain through the annihilation of the suffering individuals, an outrooting of conscience, and the natural voice of pity which raises protest against such a course; should selfishness be bred, and physical strength and refined cunning become the highest ideal; such a community would be on the verge of its own destruction; it would have labored for this result by justifying the struggle of all against all, permitting this the moment that a conflict of interests arose. Let times of need and danger, times of national war, come, and we shall see what is the fate of a society in which love of country, self-sacrifice, a sense of the ideal, respect for truth and justice, are only subjects for scorn. "The world's history is its judgment-day." All positive human authorities are subject to the authority of the conditions of life. If they do not take note of the nature of things, if they disturb the foundations of social life, their endeavors must finally suffer shipwreck on the rock of this powerful impersonal authority.