Let's not forget:
Yaacov Lozowick's Ruminations: The Never Noticed War: ...the third worst war in the 20th century, and by far the worst since the 2nd World War: the war in Congo. Perhaps five million people perished, the killing never really ended, and yet the international community, the UN, the world's media, and everyone else, basically didn't notice; in the rare cases when they did, no-one ever tried seriously to explain what was going on."
Now there's a book which tries to explain, Dancing in the Glory of Monsters: The Collapse of the Congo and the Great War of Africa, by Jason Stearns. The Economist reviews it approvingly here. I don't know if everyone interested in world politics needs to read it, but I can't think why not.