Very interesting, but kinda sloppy. The chart seems to count an average of how many people these phenomena killed per year, and then distributes them evenly along their continuation. That doesn't really work. For example the Holocaust didn't properly start until the last three years of the Third Reich, and Mao's reign had some serious spikes whenever he felt he enacted one of his Great And Marvellous Projects of Great and Marvellous Communism.
Oh, and saying the Nazis were socialists because they had socialist in their name is about as accurate as saying the PS3 isn't a console, because it has station in its name. Don't start this argument, please. -_-







