People are naive, when they come up something new, for some reason they start to believing in goodness and kindness of people. That there will be community that actually could make utopia happen.
And still, we all know that isn't ever going to happen. People are greedy, they lift their selves up, over the people they consider fellows. People feels that they deserve it more than others. If people actually could live as equals in harmony, maybe also communism would work ! :DD Buuuuut it doesn't.