It is scientifically incorrect to say that in the course of human evolution there has been a selection for aggressive behavior more than for other kinds of behavior. In all well-studied species, status within the group is achieved by the ability to cooperate and to fulfill social functions relevant to the structure of that group. While we do have the neural apparatus to act violently, there is nothing in our neurophysiology that compels us to. The technology of modern war has exaggerated traits associated with violence both in the training of actual combatants and the preparation of support for war in the general population. We conclude that biology does not condemn humanity to war , and that humanity can be freed from the bondage of biological pessimism.
Violence is neither our evolutionary legacy nor in our genes.
The same species that invented war is capable of inventing peace.