First, Communism socialism and totalitarianism are three different things.

Communism won't work because it can not deal with greed. It is human nature to want whatever we have for ourselves, and if possible, what others have.

Russian communism was not communism at all. It was the next thing to slavery.

Socialism is the best of the three, and even America has a certain amount of that. Otherwise, who could afford his own roads, schools and army?