From ostracism on the playground to romantic rejection, bullying at work, and social disregard for the aged, individuals are at constant risk of experiencing instances of social exclusion, including ostracism, rejection, dehumanization, and discrimination. These phenomena have a powerful impact as testified by their immediate influence on people’s thoughts, emotions, and behaviors. Social Exclusion: Psychological Approaches to Understanding and Reducing Its Impact investigates different psychological approaches, across multiple psychological subdisciplines, to understanding the causes and consequences of social exclusion and possible ways to reduce or buffer against its negative effects.