Abstract: The Cambridge Handbook of Personal Relationships serves as a benchmark of the current state of scholarship in this dynamic field, synthesizing the extant theoretical and empirical literature, tracing its historical roots, and making recommendations for future directions. The volume addresses a broad range of established and emerging topics, including theoretical and methodological issues that influence the study of personal relationships; research and theory on relationship development; the nature and functions of personal relationships across the life span; individual differences and their influences on relationships; relationship processes such as cognition, emotion, and communication; relational qualities such as satisfaction and commitment; environmental influences on personal relationships; and maintenance and repair of relationships. The authors are experts from a variety of disciplines, including several subfields of psychology, communication, family studies, and sociology, who have made major contributions to the understanding of relationships.