"Utopianism is dangerous. It begins with brilliant intellectuals like Marx, inspires a bunch of well-meaning idealistic people, and ends with Stalin and Mao...
So assuming one is a humanist and a realist — as opposed to a fatalist, pessimist, machiavellian, utopian, or dystopian — where do we go from here?"
http://www.edge.org/discourse/digitalpower.html