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Yes, that's a big part of the reason. They all seem fairly well educated, enlightened, and fair.

Interestingly, Kerala has had left-wing (essentially communist, or at least socialist) governance for much of the recent past.

It's not the soviet or Korean type of socialism, but the essential type of socialism that works for the benefit of society. Very rare in the history of political / socio-economic systems.

How interesting, maybe that contributed to the stability of the society.