Racism: A History was made by the BBC in 2007... and frankly, I am stunned to see the low amount of attention it's getting. It covers an immensely important subject matter, it cuts through the veils of censorship and history-whitewashing and illuminates SO much that you never heard from anywhere else! By watching this miniseries, you will learn about the history, and the current situation, of blacks in the United States. You will learn about the impact that European colonialism has had on Africa and other parts of the world. You will learn that slavery continued all over the world, in slightly subtler forms, long after the so-called abolition of slavery.
Most interestingly, you will learn that the situation of U.S. blacks actually got much WORSE after the abolition of slavery in the U.S., and you will learn the interesting (and scary) fact that Nazism wasn't an isolated aberration, but part of a global continuum (namely scientific racism and eugenics).
Anyway, this is a MUST see miniseries. It's made by the BBC so you'll have no problems seeing it legally online. Just google if you don't believe me.
P.S. You'll probably find the first episode a lot more boring than the others. Don't give up, at least see what episode 2 is about!