Freedom is incompatible with societies that privilege ancestral ties, birth based identities, "non-geographic" sources of diversity
India is proving that wrong
Political (& social) freedom CAN be sustained in a nation comprising "multiple" populations
E.g. Germans are different from the French who are different from the Dutch
But within Germany, you don't want "multiple" populations. You don't want marital restrictions
So in a single street, you have multiple populations happily coexisting. Who may not have mingled for 1000+ years
Yet share a common language, and a peaceful civic life
For India to turn "free", we have to "annihilate" caste. End it by doing what it takes. Maybe Christianize India
It is also able to resist balkanization in part because of its non-geographic diversity countering geographic faultlines
So you get upliftment of "lower castes" and yet you retain the social structure albeit with modifications. You retain endogamy
But I think there will be a grudging acknowledgment of this in near future
I would say - the country for which it has the greatest relevance is the United States!
Traditionally a melting pot where multiple populations mingle to become a single people
But not anymore
And retain their endogamous practices for much longer
E.g. Chinese and Indian Americans don't mingle as much with white Americans as the different European groups did in late 19th cen US
Yet US may endure this change and continue to exist as a strong political entity
Not unlike India