Bill, you are completely out of your depth here. You always cite exceptions as rules and never adduce any evidence.  

Unless you do, suffice it to say that the historical record largely shows that 1.) African slavery was mild compared to New World slavery because Africa lacked capitalism; 2.) That only Europeans considered their African slaves to be inhuman, 3.) That slavery destroyed African societies because it was fueled by Western greed and capital.  4.) That First Nation "slaves" commonly married into the People and became citizens, unlike the vast majority of black folks in white society, free OR slave 

And I might add, the First Nations did not cause great numbers of species to go extinct, or clear cut and poison entire watersheds. Of course, even if none of these were true it STILL doesn't excuse white settlers' genocide of the First Nations and the theft of their native lands.