>>2379035I feel like eugenics was prominent during slave society democracies but died down during feudal society monarchies. And then eugenics went up again with capitalism and bourgeois democracies.
So I would really place the underlying material motivations as similar. Eugenics is a means to justify inherited privilege in a way which doesn't allow for tyrants/kings. Slave societies were afraid of being obsoleted by feudal societies so they needed eugenics instead of divine right. Capitalists overturned feudal societies for wage slavery so they went back to eugenics.
There are still some substantial differences today of course. But yeah race justifies conquering and pillaging while not allowing kings. Why are capitalists and slavers more democratic than feudal landowners? Not really sure. Absolute monarchy had always really been a myth. Historically, kings were always very distant figures. It seems to me that feudal society just required less trade. Slave society traded directly in bodies and capitalism trades in goods/services. But feudal society was much more decentralized. So the state was necessarily more distant and authoritarian.