This is coolbert:
The debate continues. Is it nature or nurture?
"Nature of war: Chimps inherently violent"
"Of all of the world's species, humans and chimpanzees are some of the only to engage in coordinated attacks on other members of their same species. Jane Goodall was among the first to introduce the occurrence of lethal inter-community killings and since then primatologists and anthropologists have long debated the concept of warfare in this genus. Research theories have pointed to increased gains and benefits of killing off competitors and opening up increased access to key resources such as food or mates. In contrast, others have argued that warfare is a result of human impact on chimpanzees, such as habitat destruction or food provisioning, rather than adaptive strategies."
ANTS ALSO ENGAGE IN WARFARE AND ON A VERY ORGANIZED AND MASSIVE BASIS! ANTS DON'T EVEN HAVE BRAINS, ACTING MERELY TO CHEMICAL STIMULI!
Jane Goodall very emphatic that there is a basic aggressive nature to mankind. We are violent and it is a part of our very being. Chimpanzee on "patrol", those young adult males doing a "walk-about" of their territory, on the alert for interlopers, aggressive toward same, defending what is deemed as theirs with violence.