One of the most influential living psychologists looks at the history of his life and discipline, and paints a much brighter future for everyone. When Martin E. P. Seligman first encountered psychology in the 1960s, the field was devoted to eliminating misery: it was the science of how past trauma creates present symptoms. Today, thanks in large part to Seligman's Positive Psychology movement, it is ever more focused not on what cripples...