Political indifference and hostility together killed the Congress’s social-reform wing.

Evidence

This indifference—this thinning of its ranks—was soon followed by active hostility from the politicians. … Thus in the course of time the party in favour of political reform won, and the Social Conference vanished and was forgotten. — Ambedkar, B R, Annihilation of Caste_ The Annotated…, 817

Categorization

Category: Causal Relationships