Race based slavery is a truly asinine argument that, in order to believe it, you must ignore the entire history of mankind.Your claims about the wing extremes are wishful thinking, they all end in authoritarianism, but that is a diversion.
The reality is they dehumanized blacks to perpetrate race based slavery and segregation. You can keep on pretending it had nothing to do with race but it is untethered from the facts.
It depends. In some cases you are looking at people who were the products of their time and their accomplishments should be taken as a whoke acknowledging the good and the bad in the context of the times. In other cases acts of inhuman cruelty are just that and even in the context of the era cannot be excused.
No. We do not. Figures like Margeret Sanger come to mind. Seems you like to pick and choose.
Europeans used slaves from every race. Including whites. Which - a fact you will hate - actually the race MOST slaves were in early Europe. Another fact you are gonna have to ignore is slaves of African decent are a truly small percentage of who were slaves throughout the world. And for a truly small sliver of time.
Slavery is a global institution that goes all the way back to the earliest known civilizations.
It wasn't until the 1600s that African decent peoples were being transported to other nations on any scale. And the reason that occurred had absolutely NOTHING to do with the pigmentation of their skin - but EVERYTHING to do with availability and low cost. Slaves were very expensive. Slaves were almost entirely born out of war and invasions. Both extremely expensive to kingdom treasuries. Until the 1600s. By this time most European nations had mercantile ships traveling long distances for trade. Africa had little to offer for this trade based economy. But what they did have a lot of were small tribes all over the landscape. So larger African tribes began capturing whole smaller tribes and bringing them to shores to sell. And they sold them cheap.
That cheap availability of slaves that all they had to do was literally show up on a shore and pay a few coins for was so much cheaper than buying slaves from other nations out of conquest. And that is the only reason they were being transported.