survival advantage

• genes for aggression may help humans survive in the following ways- gain access to resources: food or territory, having resources like food as an example, means you are more likely to starve to death.
• aggression in humans advantage- defence- in addition to being a way to defend your resources, aggression also protects against injury and death, eg if you don't fight back when someone is aggressive with you, then they may keep going till they kill you
• if a human is more likely to survive, then they are more likely to live long enough to pass on their genes and reproduce.