Labor camps in the Soviet Union suggest otherwise. More likely, being an evil asshole is a human universal, and the (relatively) peaceful life and society we enjoy in the west right now is the exception in history, not the rule. Capitalism as a system at least has the advantage of acknowledging the existence of self interest and attempts to harness it. Communist systems try and pretend it doesn't exist or can somehow be socialized away (i.e. the New Soviet Man).