Social change comes from the combination of communication among people and their individual cognitive and emotional processes. This book systematically connects neural and psychological explanations of mind with social phenomena, covering major social sciences (social psychology, sociology, politics, economics, anthropology, and history) and professions (medicine, law, education, engineering, and business). The aim is not to reduce the social to the psychological but rather to display their harmony and interdependence. This display is accomplished by describing the interconnections among mental and social mechanisms, which interact to generate social changes ranging from marriage patterns to wars. The major tool for this description is the method of social cognitive-emotional workups, which connects the mental mechanisms operating in individuals with social mechanisms operating in groups. Social change is the result of emergence from interacting social and mental mechanisms, which include the neural and molecular processes that make minds capable of thinking. Validation of hypotheses about multilevel emergence requires detailed studies of important social changes, from norms about romantic relationships to economic practices, political institutions, religious customs, and international relations. This book belongs to a trio that includes Brain–Mind: From Neurons to Consciousness and Creativity and Natural Philosophy: From Social Brains to Knowledge, Reality, Morality, and Beauty. They can be read independently, but together they make up a Treatise on Mind and Society that provides a unified and comprehensive treatment of the cognitive sciences, social sciences, professions, and humanities.