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Aggression
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The introduction of this article does not adequately summarize the article. To comply with Wikipedia's lead section guidelines, it should be expanded.
For other usage, see Aggression (war crime).
"Agression" redirects here. For the punk band, see Agression (band).

In psychology and other social and behavioral sciences, aggression refers to behavior that is intended to cause harm. Aggression can be physical, mental, or verbal. Aggression is not the same thing as assertiveness.
Contents
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* 1 Different types of aggression
o 1.1 Moyer Classification
o 1.2 Current
* 2 Biology of aggression
o 2.1 Aggression in the brain
o 2.2 Neurotransmitters and hormones
o 2.3 Genetics and aggression
* 3 Evolution of aggression
o 3.1 Aggression against outsiders
o 3.2 Aggression within a species
* 4 Aggression in humans
o 4.1 Aggression and culture
o 4.2 Aggression in media
o 4.3 Situational factors
o 4.4 Aggression and gender
o 4.5 Aggression in children
o 4.6 War and sports
* 5 See also
* 6 Notes
* 7 References

[edit] Different types of aggression

Aggression is a complex phenomenon that is composed of a number of more specific types of behavior.

[edit] Moyer Classification

Moyer (1968)[1] presented an early and influential classification of seven different forms of aggression, from a biological and evolutionary point of view.

1. Predatory aggression: attack on prey by a predator.
2. Inter-male aggression: competition between males of the same species...