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Small-Scale Question Sunday for March 12, 2023

Do you have a dumb question that you're kind of embarrassed to ask in the main thread? Is there something you're just not sure about?

This is your opportunity to ask questions. No question too simple or too silly.

Culture war topics are accepted, and proposals for a better intro post are appreciated.

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How am I to make sense of the fact that the castes in India have been highly endogamous for the past two thousand years and that the pre-industrial world was Malthusian? Shouldn't that have resulted in the gradual replacement of the lower castes with the upper castes, or did the upper castes not actually receive any material benefit as a result of their higher status?

Gregory Clark has argued that in England, the upper classes did replace the lower classes as a result of their material advantage. But they did not form distinct endogamous castes, so most of the descendants of the upper classes fell into the lower classes and there was some limited mixing between the classes. But India, my understanding is that the Brahmins didn't become Shudras, so why didn't the Shudras go extinct?

If there are too many scholars and elites, then that's a recipe for internal conflict and the downfall of the state. There should be a fixed ratio of elite to worker in pre-industrial society. Most people have to do agricultural work after all.

But what keeps it fixed? The Malthusian model is not consistent with a caste maintaining both a material advantage and not outgrowing the poorer castes, unless it is losing people to those lower castes, which we know from genetic studies was very rare.

The more elites there are, the less material benefit they get from the finite resource base. See all the second and third sons of Spanish nobility - they couldn't inherit the estate so they had to do other things. Military careers, becoming conquistadors, the church... They didn't replace the peasantry, how could they?

If state X has too many elites, there will be some kind of automatic stabilizer that fixes this. The elites compete more with eachother for the positions they want - internal conflict, decadence and collapse of the state. It gets conquered and the ratios will be fixed. Maybe when the Muslims showed up they killed much of the Hindu elite caste and restored balance. Or they'll find some way to get rid of excess elites in foreign wars or whatever. Maybe disease and inbreeding get rid of most of the excess. We observe that not everyone is an elite, there must be some mechanism that forces this.

Obviously something is preventing them from replacing the lower castes. The question is what.