US Authoritarianism

A lot of the enlightenment was also about bullshitting science to justify past dogma. It can't be said that it was a unified movement, so there will definitely be plenty of examples of people who were genuinely forward-thinking and had only good intentions. But pseudosciences like eugenics and phrenology were used to sell a narrative of European racial superiority, and even more legitimate ideas like evolution and psychology were twisted to fit this narrative that Europeans were somehow more evolved and developed. This in turn justified practices of colonialism, slavery, and segregation as somehow making the world a more enlightened place, under the stewardship of the enlightened peoples.

The enlightenment was like a metaphorical medicine that cured society of its superstitious past, but like many medicines, it could be poisonous if taken the wrong way.