From leading interdisciplinary authorities, this book traces the development of female aggression and violence from early childhood through adulthood. Cutting-edge theoretical perspectives are interwoven with longitudinal data that elucidate the trajectories of aggressive girls' relationships with peers, later romantic partners, and with their own children. Key issues addressed include the predictors of both social and physical aggression at different points in the lifespan and the connections between being a victim and a perpetrator of harmful behavior. The book also examines the interplay of biological and sociocultural processes in shaping aggression in girls. Concluding commentaries integrate the ideas and findings presented into cogent recommendations for intervention, prevention, juvenile justice, and related research and policy initiatives.