Nothing is therefore more important for you to remember than the fact that endogamy is foreign to the people of India. The various Gotras of India are and have been exogamous: so are the other groups with totemic organization……..
If a group desires to make itself endogamous a formal injunction against intermarriage with outside groups will be of no avail, especially if prior to the introduction of endogamy, exogamy had been the rule in all matrimonial relations. Again, there is a tendency in all groups lying in close contact with one another to assimilate and amalgamate, and thus consolidate into a homogeneous society. If this tendency is to be strongly counteracted in the interest of Caste formation, it is absolutely necessary to circumscribe a circle outside which people should not contract marriages.