Good point, and good use of what should be well known historical data. I don't want to start a historical and political debate about Communism, so I'll leave some things out and stay focused on Civ4. I think the way Communism is included in Civ4 is good. You've got The Kremlin and Intelligence Agency, which is very useful if you play an Espionage type of game. And you've got the choice of ignoring it for a while and focusing on other techs and civics without too much penalty. I think sometimes, people want Civ to be as realistic as possible, which is an unrealistic expectation to have about a game. It's a strategy game, so many concepts will be simplified to make the game work and be enjoyable. I do agree though that the way the civics work is a bit limited, but I think they should be approached from the angle of 'how does this fit in to the game', instead of 'how can I get this ideology in to the game'.