All these attempts have failed dismally; more than dismally, have failed tragically and with lethal consequences for hundreds of millions of innocent human beings; in Stalin's five year plans, Mao's Cultural Revolution... and perhaps soon in the USA's ObamaCare as well. Why do these social experiments fail... and why does Humanity keep trying them, in spite of repeated tragic failures?

Why these Utopian experiments fail is easy to see, if we but choose to look and see the truth; the idea that what works in a family or small tribe can be scaled up without limit is Utopian. It is a false belief, and a lethal belief. Sociologists have researched this very topic; money-free societies can exist, do exist, direct democracy can exist, does exist, in communities of up to about 250 people. Once this number is exceeded, the family based, altruism based system starts to break down.