Originally Posted by Thrasher 
I actually think people can evolve and individuals can act above base greed and selfish animal instincts. Some cultures and societies do a better job of facilitating this behavior. But there will always be some pyschopaths (not quite the right word, which currently escapes me) that think of nothing but themselves.
Opportunists?
And I agree. That's the fundamental problem with utopian ideas. They assume that the opportunists (and worse) can either be marginalized by the collective or eliminated from human nature.