Why do people in a business negotiation settle for less than each of them could and should receive? Two rational players face off in an economic game. Each pursues interests as conventional theory dictates, but all too often, the result is suboptimal. Why do they fail to capture what Dr. Young calls the cooperative surplus? Dr. Young proposes that the root of the problem lies in the philosophical assumptions underlying decision and game theory. The common understanding of economic rationality is fundamentally flawed, he says. It assumes that rational players are always self-interested and...