So far, it may be said, the distribution of Indian humanity is not very unlike that of the races of Europe. Even this very crude summary, it is true, shows at least three great groups of languages, Dravidian in the south, Indo-European in the west and north-west, Tibeto-Burman in the north and the north-east. There are in fact five separate families of human speech which have their homes in India; the Aryan, the Dravidian, the Mundā, the Mon-Khmer, and the Tibeto-Chinese. The lateral spread of these is, of course, no real indication of the present habitat of five different races of men. But they do indicate the existence, in varying degrees of purity, of five different origins, of which the Dravidian and Mundā alone can be said to be purely indigenous and confined to the Indian peninsula. Nowhere is it more easy than in India to see how languages spread from race to race, from tribe to tribe, with a sort of linguistic contagion; the stronger, more supple, more copious, more cultivated languages replacing and gradually destroying weaker forms of speech. Something of the same sort has occurred, and is even now happening, in Europe. But the surviving European languages are mostly sturdy and vigorous, and do not readily yield place to one another. In India the process of linguistic invasion is going on before our eyes, attendant on the gradual growth of Hindu civilisation and religion, which disdains to practise open and reasoned proselytism, but extends its borders nevertheless, and carries with it one or another of the Aryan dialects.