Human thought is an amazing thing. It has given us not only science, literature, and morality, but also superstition, slavery, and war. Thought has the power to uncover the deepest mysteries of the universe. Or to create new realities - social realities.

But that just makes the nature and power of human thought all the more puzzling. The mind that spent millennium after millennium, mired in archaic social formations, in the grips of irrational superstitions is the very same mind, with the very same powers of thought, as the mind that produced science, philosophy, and art.