Dr. Dan Baker, director of the Life Enhancement Program at Canyon Ranch, has devoted his life to teaching people how to be happy. And apparently, most of us could use a little tutoring. Research has shown that the root of unhappiness--fear--lies in the oldest, reptilian part of our brains, and negative reactions are often dictated by primal instincts. We're literally "hardwired for hard times." In What Happy People Know, Dr. Baker uses evidence from the new science of happiness to show us how we can overcome this genetic predisposition toward negative reactions and lead a truly...