[johnnyanmac]

Depends on your region, but let's not pretend it was some rarity pre cotton gin. You didn't need to be as rich as yo think to have slave labor.

[fastball]

Quite the leap to go from "pre-industrial people" to "Antebellum US Southerners", and even then the majority of that (hyperspecific) group did not own slaves.

[alchemism]

If you include all pre-industrial people in history, then yes enslavement of outside groups is very much the norm not the exception.

[fastball]

Citation needed.