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...
the tribe did what was needed to survive.

The origin of human aggression lies in factors such as society and culture. Aggression is a learned emotion that is built on different factors in a person"s environment. It is the combination of environment, society and culture that creates aggressive behavior. It is the person"s natural instincts that are the foundation for the three. The Tasaday tribe was a peaceful group of people, while the Fentou were aggressive warriors. Both of the tribes had the ability for aggression and passivity but were driven to one by their environment, society and culture.