The “Black Book of Communism” details the millions of deaths of which you speak. Libs try to pin Hitler on the right wing, although he too was a socialist.
True, but Rummel was doing so before TBBC was published. The difference is that he also has stats on non-Communist "democides", so that one can actually compare the Commies with, for instance, the Inquisition, or Genghis Khan.
If you check the stats for "socialism" as a whole ("national" socialism plus "international" socialism), it turns out that "socialism", far from being a societal benefit, is a disaster far worse than the Black Plague.