The Spread MindOnce we came out of the jungle and found time to think of something besides food, sex, and shelter, we confronted the fundamental questions: what are we? Who are we? Is a person a body, a soul? How do we access the external world if we are nothing but brains encased in bodies? As neuroscientists map the most detailed aspects of the human brain and its interplay with the rest of the body, they remain baffled by what is essentially human: our selves. In