And a moment of genuine emotional connection with an enslaved person can make people on the top question the entire institution.
And for *that* to actually work, you also need enslaved people to be instantly recognizable.
-loss of religion as the ok/not ok to enslave dividing line
-lots of enslaved Africans, for reasons that up till now were logistical, not race-based
-but now there's a stark visual difference between the enslaved and the free.
And for laws, you need some kind of solid-sounding justification. So they made some.
And since Europe was also colonizing the rest of the world, they also needed reasons why it was ok to do that to the peoples of Asia, Australia, etc.
So that field was a natural choice for explaining differences btwn people on different continents.
Colonizing the world gave Europe a nail it needed to pound, & it picked natural history as the hammer. Boom: Enlightenment-borne scientific racism.
-what was happening at the time,
-what people were trying to accomplish,
-and what tools they had at their disposal.
W/o that, throwing around Quotes From Great Thinkers(TM) is just showboating.