Civilization Began When Slavery Was Abolished

I believe he was talking about the slavery of black people in America specifically

I'm sure there's still slaves in America though

100%, its just not as easy to find these days

But not legally and not widespread based on the color of skin.
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I'm fairly certain sex slavery is rampant everywhere. Particularly of children.
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The point was that he was saying prior to it no longer being legal to own people - particularly based on skin color - people could not be considered civilized.

And then you commented just to make sure you could maintain the frequency

Which frequency?