Tribal endogamy explains the Hindu caste system. As Vedic society, an advanced and differentiated society characterized by class (varna) hierarchy, expanded from the Northwest into India's interior, it absorbed ever more tribes but allowed them their distinctive traditions and first of all their defining tradition, viz. their endogamy. This way, endogamous self-contained units or tribes became endogamous segments of Hindu society, or castes.

What It Means

This is a placeholder explanation generated by the low-overhead model. It interprets "Tribal endogamy explains the Hindu caste system. As Vedic society, an advanced and differentiated society characterized by class (varna) hierarchy, expanded from the Northwest into India's interior, it absorbed ever more tribes but allowed them their distinctive traditions and first of all their defining tradition, viz. their endogamy. This way, endogamous self-contained units or tribes became endogamous segments of Hindu society, or castes." in the context of "Elst, K. The Sarna: a case study in natural religion https://web.archive.org/web/20190310131643/http://koenraadelst.bharatvani.org/articles/chr/sarna.html" to mean that wisdom is timeless.