From leading 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, with later romantic partners, and with their own children. Key issues addressed include the predictors of social and physical aggression at different points in the lifespan, connections between being a victim and a perpetrator, and the interplay of biological and sociocultural processes in shaping aggression in girls. Concluding commentaries address intervention, prevention, juvenile justice, and related research and policy initiatives.