A03

• evidence from daly & wilson?

  • found that homicide rates much higher when mans wife/partner is about to leave him already left
  • daly 1982 - men were more violent when they discovered that their wife/partner had been unfaithful
  • supports sexual jealousy & negative inducements
  • being more aggressive to keep their mate in order to enhance reproductive success
• * understand gender differences?

  • well known fact that males are more aggressive than females
  • this explanation suggests females are less aggressive - dont need to be & dont need to fight for dominance as males dont look for this in females
  • instead they value 0.7WHR & youthful women
  • males more aggressive - have to fight for dominance - intra sexual selection in order to get mate & women want someone aggressive in order to protect them
  • shows why males have to be more aggressive than females in order to enhance their reproductive success
• X cannot explain cultural differences?

  • kung san people of kalahari have negative attitudes towards use of aggression
  • its discouraged & people who are aggressive will lose status & reputation in group
  • suggests aggression is learnt from culture rather then innate & evolutionary
  • as in this culture aggression has no evolutionary benefit
  • cant be said that all people have evolved in same way as other cultures have differing opinions on aggression
• X cannot explain sexual jealousy in homosexual relationships?

  • domestic violence rates higher in homosex relationships
  • theory states that domestic violence occurs to reduce chances of cuckoldry
  • but not potential problem in these non reproductive relationships
  • may not consider other factors causing male aggression - learn through observation & imitation of role model/past childhood experiences repressed in unconscious mind
  • must be other factors explaining aggresion in relationships other than sexual jealousy & preventing partner reproducing with someone else
• X deterministic?

  • pro - can measure & predict aggressive behaviour to intervene if someone is showing sexual aggression before they become aggressive
  • con - not everyone is same & ingores free will
  • people choose how to behave so it cannot be concluded that all aggressive behaviour is due to evolution
  • does not consider individual differences whereby some people may show sexual jealousy but never show aggression towards partner as they choose not to
  • ignores individuals choice & free will in peoples behaviour