This seems relevant: https://en.wikipedia.org/wiki/History_of_slavery https://en.wikipedia.org/wiki/History_of_slavery Obviously GP's claim is a dumb one, beca

This seems relevant: https://en.wikipedia.org/wiki/History_of_slavery https://en.wikipedia.org/wiki/History_of_slavery Obviously GP's claim is a dumb one, because all you have to do is say "Here is one counter example, you're wrong". But looking at that page makes it very clear that slavery is a big part of most of world history.