Aggression is described as a complex form of behavior marked by hostility, anger, or belligerence. It is often understood as a response that can function as a defense mechanism, emerging when individuals or groups perceive threats and attempt to protect themselves. In psychological research, aggression is frequently associated with several mental health conditions, including personality disorders and conduct disorder. It may present in different settings, ranging from interpersonal interactions to group dynamics, and is studied as both an emotional and behavioral response.
Aggression can appear in both physical and verbal forms, and its effects may be significant, sometimes persisting over time and influencing relationships and social environments. In social contexts, it is often linked to patterns of competition, dominance, and territorial behavior, shaping how individuals or groups interact. Because of its association with psychological conditions and its potential to cause lasting harm, aggression is widely studied in clinical and behavioral sciences as an important factor in understanding human behavior.