White Man's Burden
It's very simple. In order to understand white supremacy, we must first dismiss the fallacious notion that white people can give anybody his freedom. A man is born free. You may enslave a man after he is born free, and that is in fact what this country does. It enslaves blacks after they're born. The only thing white people can do is stop denying black people their freedom.
Here's this speech which I'd really recommend you watching the whole god damn thing. Like, right now.