some good background on racism in the us:
"The tension between the noble ideology of equality and the cruel reality of #genocide, #enslavement, and #colonization had to be reconciled. Thomas Jefferson (who himself owned hundreds of enslaved people) and others turned to science. [...] If science could prove that black people were naturally and inherently inferior (he saw Indigenous people as culturally deficient—a shortcoming that could be remedied), there would be no contradiction between our professed ideals and our actual practices."