At the heart of Africa is the Congo, a country the size of Western Europe, bordering nine other nations, that since 1996 has been wracked by a brutal war in which millions have died. In Dancing in the Glory of Monsters, renowned political activist and researcher Jason K. Stearns has written a compelling and deeply-reported narrative of how Congo became a failed state that collapsed into a war of retaliatory massacres. Stearns brilliantly describes the key perpetrators, many of whom he met personally, and...