explains aggression through natural selection. For aggression to be adaptive, it has to serve a purpose
David Buss identified 7 adaptations of aggression in humans:
selfdefence
reputation to ward off future aggression
to achieve status - more allies and fewer enemies
Get and keep a better share of resources. Pinker states aggression evolved in men to compete for women
deny own resources to children of rivals
prevent other males from sharing the prime females
prevent partner from being unfaithful
Intra group aggression
Daly and Wilson said male-male aggression among young men is common in all human cultures - suggesting it is evolutionary
Potts and Hayden said war and aggression aimed to control womens mating habits since the development of farming made the inheritance of land important. Jealousy has evolved as a male response to the threat of infidelity. Jealous males are determined to pass on their own genes.
intra group
Daly and Wilson: men may use jealousy and violence to control partners sexual behaviour. Violence is not intended to kill but may have that result. E.g., fertile young women are 10x at risk of domestic violence.