Mostly I’m linking this New Yorker article: The Caging of America so I don’t forget to go back and read it. I’ve read the first few paragraphs, and it seems worth going back to. (h/t Roger).
Catching my eye right at the front “In other words, there’s the scientific taste for reducing men to numbers and the slave owners’ urge to reduce blacks to brutes.” The former is the Northern impulse whereas the latter is the Southern.