Drawing on her research conducted at Yale University and Boston College as well as the latest studies in psychology, medicine, anthropology, biology, and computer science, LaFrance explores the compelling science behind the smile. Who shows more fake smiles, popular kids or unpopular kids? Is it good or bad when a bereaved person smiles? These are some of the questions answered in this groundbreaking and insightful work. To read it is to learn just how much the smile influences our lives and our relationships.