re: #352 EPR-radar
The list can be made much shorter if one looks at ideologies of the regimes, as opposed to specific rulers who were mad/evil etc.
4 of the top 5 worst ideologies are most likely (not in order):
Third reich
Communist dictatorships
US confederacy
Absolute monarchyI don’t see a way for the US confederacy to evade its place in the top 5 of this kind of list.
What about right wing dictatorships ala Franco, Pinochet, and the Argentine Junta? The latter was fond of kidnapping pregnant women and stealing their children and then murdering the mothers.