The document defines aggression as any behavior intended to harm another individual physically or psychologically. It discusses several forms of aggression including hostile, instrumental, direct and indirect, and violence. Theories proposed to explain aggression include biological, learning, cognitive, and social influence perspectives. Determinants of aggression include individual factors like gender and personality, as well as situational factors such as the environment, frustration, and social rejection. Techniques to prevent and control aggression discussed include punishment, catharsis, cognitive interventions, exposure to non-aggressive models, social skills training, and incompatible responses.