Hindus form warring self-interested caste groups rather than an integrated society.

Evidence

This anti-social spirit, this spirit of protecting their own interests, is as much a marked feature of the different castes in their isolation from one another as it is of nations in their isolation. The Brahmin’s primary concern is to protect ‘his interests’ against those of the non-Brahmins; and the non-Brahmins’ primary concern is to protect their interests against those of the Brahmins. The Hindus, therefore, are not merely an assortment of castes, but are so many warring groups, each living for itself and for its selfish ideal. — Ambedkar, B R, Annihilation of Caste_ The Annotated…, 880