Americans, some of us, know that slavery was part of our history from 1619 to the Civil War. We're less knowledgable about the slavery in the Caribbean and South America. I'd have to use Google to find out the extent of slavery in Canada or Chile, Bolivia or Mexico.
I know, of course, that "slave" derived from "Slav" because Slavs were often enslaved sometime back in history. The TV series "Vikings" touched on slavery there.
The Bible includes codes for treatment of slaves.
My recent reading has included discussions of slavery among Native American tribes and enslavement and slave trading in Africa.