All these stocks of people came into India from various directions and with various cultures, centuries ago, when they were in a tribal state. They all in turn elbowed their entry into the country by fighting with their predecessors, and after a stomachful of it settled down as peaceful neighbours.1 The Negroes and the Whites and the various tribal groups that go by name of American Indians in the United States may be cited as more or less appropriate illustrations in support of this view. But we must not confuse matters, for in India the situation is different. As pointed out before, the peoples of India form a homogeneous whole. The various races of India occupying definite territories have more or less fused into one another and do possess cultural unity, which is the only criterion of a homogeneous population.