External cuases of agression
1. Weapons effect
2. Mass media
influence
3. Environmental stressors (such as overcrowding, noise, and pollution)
4. Frustration and perceived injustices
5. Unresolved conflicts or perceived threats
6. Socialization and family upbringing
7. Drug and alcohol use
8. Peer pressure
9. Cultural norms and values
10. Economic inequality and poverty.