Only destroying shastra-based religion can break the caste system.

Evidence

But whether the doing of the deed takes time or whether it can be done quickly, you must not forget that if you wish to bring about a breach in the system, then you have got to apply the dynamite to the Vedas and the shastras, which deny any part to reason; to the Vedas and shastras, which deny any part to morality. You must destroy the religion of the shrutis and the smritis. Nothing else will avail. This is my considered view of the matter. — Ambedkar, B R, Annihilation of Caste_ The Annotated…, 992

Categorization

• XREF: Core thesis of the book — the reader’s stated purpose. Pairs with the graded-sovereignty argument and the later conversion-to-Buddhism move.