Three different sources contribute to the production of this elementary moral state, race, environment, and epoch. What we call race consists of those innate and hereditary dispositions which man brings with him into the world and which are generally accompanied with marked differences of temperament and of bodily structure. They vary in different nations. Naturally, there are varieties of men as there are varieties of cattle and horses, some brave and intelligent, and others timid and of limited capacity; some capable of superior conceptions and creations, and others reduced to rudimentary ideas and contrivances; some specially fitted for certain works, and more richly furnished with certain instincts, as we see in the better endowed species of dogs, some for running and others for fighting, some for hunting and others for guarding houses and flocks. We have here a distinct force; so distinct that, in spite of the enormous deviations which both the other motors impress upon it, we still recognize, and which a race like the Aryan people, scattered from the Ganges to the Hebrides, established under all climates, ranged along every degree of civilization, transformed by thirty centuries of revolutions, shows nevertheless in its languages, in its religions, in its literatures, and in its philosophies, the community of blood and of intellect which still to-day binds together all its offshoots. However they may differ, their parentage is not lost; barbarism, culture and grafting, differences of atmosphere and of soil, fortunate or unfortunate occurrences, have operated in vain; the grand characteristics of the original form have lasted, and we find that the two or three leading features of the primitive imprint are again apparent under the subsequent imprints with which time has overlaid them. There is nothing surprising in this extraordinary tenacity. Although the immensity of the distance allows us to catch only a glimpse in a dubious light of the origin of species,[1] the events of history throw sufficient light on events anterior to history to explain the almost unshaken solidity of primordial traits. At the moment of encountering them, fifteen, twenty, and thirty centuries before our era, in an Aryan, Egyptian, or Chinese, they represent the work of a much greater number of centuries, perhaps the work of many myriads of centuries. For, as soon as an animal is born it must adapt itself to its [surroundings]; it breathes in another way, it renews itself differently, it is otherwise stimulated according as the atmosphere, the food, and the temperature are different. A different climate and situation create different necessities and hence activities of a different kind; and hence, again, a system of different habits, and, finally a system of different aptitudes and instincts. Man, thus compelled to put himself in equilibrium with circumstances, contracts a corresponding temperament