Peter Joseph, of the Zeitgeist Movement talks a lot of sense. Here’s a short interview with him in which he outlines the basic principles:

Come back to the basic necessities of life
The current economic system is intrinsically flawed
Almost everyone suffers under this system
Eliminate war, famine, most crime, all monetarily related
Think globally, not nationally
Self interest becomes social interest
Invent not for money but for a better world
Undo psychological distortions

Good stuff and not just wishful idealism, nor communism. I find he comes across better in this interview than in the lengthy movies: