Developmental Psychology Series: The Development of Prosocial Behavior focuses on the advancement of techniques, methodologies, and approaches involved in studies on prosocial behavior, including moral reasoning and judgment, altruism, liberalism, and conservatism. The publication first elaborates on the general conceptual and theoretical issues in the study of prosocial and altruistic behavior; early development and socialization of prosocial behavior; and the relationship between prosocial behavior and moral reasoning. The text then takes a look at the generality of altruism in children, social learning theory and development of prosocial behavior, and the development of altruism. Discussions focus on directions for research on prosocial behaviors; research findings and interpretations on the early forms of altruism; social learning of prosocial behavior and moral judgment; and generality of prosocial behavior. The manuscript examines personality development and liberal sociopolitical attitudes, development of prosocial motivation, and the effects of mood on prosocial behavior in children and adults. Topics include motivational mechanisms of prosocial acts, dialectics of development, antecedents of liberalism and conservatism in adults, and personality and socialization in relation to adolescents' political orientations. The book is a dependable source of data for researchers interested in the development of prosocial behavior.