Simple reason why marxism fails.

http://en.wikipedia.org/wiki/The_Third_Wave

Whatever you think of collectivism and individualism, we are individuals. Just a plain simple fact. If you ignore this fact when trying to get people to cooperate and work together you basically opening the door for the group to be controlled by an abusive authority.

>>2
Only in bizarroworld could someone believe that a lack of disagreement is a good thing.

I'd be more suspicious of a "utopia" where everyone always has a big smile on their face and not a single word of complaint than a society where people constantly repine and criticize their leaders. I'd much rather live in the latter.