The new insights that have been obtained about the role of emotions are an outcome of a quiet revolution that has occurred over the past two decades in three important research disciplines: brain sciences, behavioral economics, and game theory. These three together have in recent years expanded our understanding of all aspects related to human behavior. If in the past emotions were studied mainly in psychology, sociology, and philosophy, while rationality was the preserve of economics and game theory, today both the study of rationality and the study of emotions are active research subjects for scholars in all those fields.
