The system of castes has existed for more than twenty centuries in India. It doubtless had its origin in the recognition of the inevitable laws of heredity. When the white-skinned conquerors, whom we call Aryans, penetrated India, they found, in addition to other invaders of Turanian origin, black, half-savage populations whom they subjugated. The conquerors were half-pastoral, half-stationary tribes, under chiefs whose authority was counterbalanced by the all-powerful influence of the priests whose duty it was to secure the protection of the gods. Their occupations were divided into classes, that of Brahmans or priests, Kchatryas or warriors, and Vaisyas, laborers or artisans. The last class was perhaps formed by the invaders anterior to the Aryans, whom we have just mentioned. These divisions corresponded, as is evident, to our three ancient castes, the clergy, the nobility, and the third estate. Beneath these classes was the aboriginal population, the Sudras, forming three quarters of the whole population. Experience soon revealed the inconveniences which might rise from the mixture of the superior race with the inferior ones, and all the proscriptions of religion tended thereafter to prevent it. "Every country which gives birth to men of mixed races," said the ancient law-giver of the Hindus, the sage Manu, "is soon destroyed together with those who inhabit it." The decree is harsh, but it is impossible not to recognize its truth. Every superior race which has mingled with another too inferior has speedily been degraded or absorbed by it. The Spaniards in America, the Portuguese in India, are proofs of the sad results produced by such mixtures. The descendants of the brave Portuguese adventurers, who in other days conquered part of India, fill to-day the employments of servants, and the name of their race has become a term of contempt. Imbued with the importance of this anthropological truth, the Code of Manu, which has been the law of India for so many centuries, and which, like all codes, is the result of long anterior experiences, neglects nothing to preserve the purity of blood. It pronounces severe penalties against all intermingling of the superior castes between themselves, and especially with the caste of the Sudras. There are no frightful threats which it does not employ to keep the latter apart.