I. Emerging Theories of Human Aggression -- 1 Theories of Aggression: From Drives to Cognitions -- 2 Moral Cognition and Childhood Aggression -- 3 Is Something Missing? Some Observations Prompted by the Cognitive-Neoassociationist View of Anger and Emotional Aggression -- II. Peers, Sex Roles, and Aggression -- 4 Peer Adaptations in the Development of Antisocial Behavior: A Confluence Model -- 5 Bullying at School: Long-Term Outcomes for the Victims and an Effective School-Based Intervention Program -- 6 Indirect Aggression in Boys and Girls -- III. Environmental Instigation and Mitigation of Aggression -- 7 Long-Term Effects of Repeated Exposure to Media Violence in Childhood -- 8 Risk and Resource Variables in Children's Aggressive Behavior: A Two-Year Longitudinal Study -- IV. Development of Adult Aggression -- 9 Childhood, Adolescent, and Adult Features of Violent Males -- 10 Aggression in Two Generations -- V. Group Aggression in Adolescents and Adults -- 11 Delinquent Gangs -- 12 Nationalism, Patriotism, and Aggression: A Clarification of Functional Differences.