It was a horrible, unforgivable thing a particular group of white people did to a particular group of black people. But how can we say that one group of people has been marginalized more than another? Let's not forget the abuse, theft and murder that was perpetrated against Native Americans. We haven't even given them back what was rightfully theirs. What about the discrimination the Irish, Jews, gays, Hispanics and Muslims have all historically been subjugated to in this country? The 8 million to study the past needs to instead be invested into creating educational and unifying ideas.