Nevertheless Mr.Nesfield's book will always rank as a most interesting and original contribution to the literature of the subject, and his work did much to stimulate inquiry into the origin of the caste system.
10.

Racial Theory.
In his Introduction to the _Tribes and Castes of Bengal_ Sir Herbert Risley laid stress on the racial basis of caste, showing that difference of race and difference of colour were the foundation of the Indian caste system or division of the people into endogamous units.

There seems reason to suppose that the contact of the Aryans with the indigenous people of India was, to a large extent, responsible for the growth of the caste system, and the main racial divisions may perhaps even now be recognised, though their racial basis has, to a great extent, vanished.

But when we come to individual castes and subcastes, the scrutiny of their origin, which has been made in the individual articles, appears to indicate that caste distinctions cannot, as a rule, be based on supposed difference of race.

Nevertheless Sir H.Risley's _Castes and Tribes of Bengal_ and _Peoples of India_ will, no doubt, always be considered as standard authorities, while as Census Commissioner for India and Director of Ethnography he probably did more to foster this branch of research in India generally than any other man has ever done.
11.