Human Aggression There are different reasons why a person may act aggressively towards other human beings. The person may act this way because of his culture or the way he was brought up in society. The person does not, however, act this way based on instinct alone. Aggression is a molded, learned behavior. A human being must have both environmental and instinctual factors in order to display aggression. Some of a person’s natural instincts are to desire food, reject certain things, escape from danger, fight when challenged, sex desire, care for the young, dominate, and to accept inferior status. The combination of instinct