Born to Kill

People do not become savage they are born savage since. Since the beginning of time we were here to defend our land, and our food, and our selves. We are raised to be nice, polite and civil; we are designed to be aggressive, hard and unexpected. As a baby you would say we are defenseless and we do not seem very savage, at that age others do not see the degree of the savagery to the extent it can be driven to.
As an example, in Lord of The Flies, Jack and the other boys reached their inner savagery. They were trained in a society to be civil but when all there civility was taken away there savagery came into view, and two lives were taken away. These boys were British gents, they were well behaved to the naked eye.