This document discusses different perspectives on aggression. It defines aggression as presenting an aversive stimulus to an unwilling victim. There are two main types of aggression: hostile aggression which involves striking out due to anger, and instrumental aggression which uses hostile means to obtain desired results. Factors that can increase aggressive behavior include certain neurological activations and environmental stressors like crowding and heat. Perspectives on the causes of aggression include biological theories about hypothalamic stimulation, psychodynamic theories involving frustration of desires, cognitive theories regarding how information is processed, and social learning theories where aggression is reinforced. Cultures can also influence aggression levels by fostering competitiveness or deference. Experts definitions of aggression vary and include behaviors intended to harm others

1. Aggression Motivation & Emotion

2. What is Aggression?

6. Factors Increasing Aggressive Behavior

9. Theories of Aggression

17. Definitions of Aggression Proposed by psychologists