reproductive advantages

• genes for aggressive behaviour may also increase the likelihood that a human reproduces and passes on their genes. This is particularly true for men rather than women for the following reasons: competition for mates, deter infidelity
• competition for mates: Anisogamy- means women must be selective over who they reproduce with, as such, men compete with other men for status and resources so that women will choose them as a mate. Pinker (1997) argues that competing for women is the main reason is the main reason aggression evolved in men.
• Deter infidelity- Anisogamy also means women can be certain of paternity, but men can't. Raising another man's child is evolutionary disadvantageous and so men may have evolved aggression as a way to prevent women from cheating on them. Wilson and Daly (1996), identify two main strategies for this- direct guarding- and negative inducements.