There are apparently two anthropological camps, dubbed hawks and doves. The hawks argue that war is an evolved predisposition in humans dating back to when they had a common ancestor with chimpanzees. Doves, meanwhile, argue that war has only emerged in recent millennia, motivated by changing social conditions.
Anthropologist R. Brian Ferguson, who has spent more than 40 years researching the origins of war. Ferguson, a professor of anthropology at Rutgers University, notes that war is not the same thing as interpersonal violence or homicide. War implies organized, armed conflict and killing sanctioned by society and carried out by members of one group against members of another group.
Ferguson argues that current evidence suggests that war was not always present but began as a result of societal changes—with evidence of war's origins appearing at widely varying timestamps in different locations around the world. He estimates that the earliest signs of war appear between 10,000 B.C., or 12,000 years ago.
"But in some areas of the world you don't see any signs of war develop until much more recently," he says, noting that in both the U.S. Southwest and Great Plains there is no evidence of war until around 2,000 years ago.
Ferguson has studied the anthropological and archaeological records throughout ancient, and sometimes into more modern, human history. He says there is a lack of evidence of war or large-scale violence, in many places around the world throughout various periods of history. He has spent four decades researching and historically contextualizing the various origin points of war around the world. He has also contextualized incidents of group violence in humanity's closest ape cousins, chimpanzees. He argues that war is not innate, evolutionary nor inevitable behavior for humans.
Ferguson writes: "Humans, they argue [doves], have an obvious capacity to engage in warfare, but their brains are not hardwired to identify and kill outsiders involved in collective conflicts. Lethal group attacks, according to these arguments, emerged only when hunter-gatherer societies grew in size and complexity and later with the birth of agriculture. Archaeology, supplemented by observations of contemporary hunter-gatherer cultures, allows us to identify the times and, to some degree, the social circumstances that led to the origins and intensification of warfare."
Ferguson concludes: "It's important for people to see that a world without war is a realistic possibility. Maybe not now, but a world without war is something we can aspire to realistically, and work toward. If you think that's something that can never happen, well that fatalism is one of the main props that is keeping war going. It's good to break out of that mindset."
The full interview can be read here