But in the course of the centuries nature triumphed over these formidable prohibitions. Woman always has her charms, no matter how inferior she may be in caste. In spite of Manu, crossings of caste were numerous, and one need not travel India throughout to perceive that, to-day, the populations of all the races are mixed to a large extent. The number of individuals white enough to prove that their blood is quite pure is very restricted. The word caste, taken in its primitive sense, is no longer a synonym of color, as it used to be in Sanscrit, and, if caste had had only formerly prevailing ethnological reasons to invoke, it would have had no reason for continuing. In fact, the primitive divisions of caste have long since disappeared. They were replaced by new divisions, the origin of which is other than the difference of races, except in the case of the Brahmans, who still form the less mixed portion of the population. Among the causes which have perpetuated the system of castes, the law of heredity has furthermore continued to play a fundamental part. Aptness is inevitably hereditary among the Hindus, and, also inevitably, the son follows the profession of the father. The principle of heredity of the professions being universally admitted, there has resulted the formation of castes as numerous as the professions themselves, and to-day in India castes are numbered by the thousand. Each new profession has for an immediate consequence the formation of a new caste. The European who comes to India to live soon perceives to what an extent the castes have multiplied in observing the number of different persons whom he is obliged to hire to wait on him. To the two preceding causes of the formations of castes, the ethnological cause, now very weak, and the professional, which is still very strong, are added political office, and the heterogeneity of religious beliefs. The castes springing from political office might, strictly speaking, be placed in the category of professional castes, but those produced by diversity of religious beliefs should be attached to none of the preceding causes. In theory, that is, only judged by the reading of books, all India would be divided into two or three great religions only. But practically these religions are very numerous. New gods, considered as simple incarnations of ancient ones, are born and die every day, and their votaries soon form a new caste as rigid in its exclusions as the others. Two fundamental signs mark the conformity of castes, and separate from all the others the persons belonging to them. The first is that the individuals of the same caste cannot eat except among themselves. The second is that they can only marry among themselves.