Boy did you commies get down to some furious typing after my last post. It must have set a weakly record. Could it be your all feeling a little insecure in your beliefs? As you admit, there has never been a succesful communist society. The flaw in your thinking is that these attempts at communism weren't the utopia you envision. Do you think they started out with the intention of failing? They started out thinking as you do, and had the inevitable result. Communism will always fail as it is human nature to try and get ahead. Always has been, always will be. There will always be someone who will sieze the opportunity to improve their position.
By the way, rest assure that Sprout is indeed a "HE"