Primitive society was not driven by war, scientists believe. Researchers from Abo Academy University in Finland say that violence in early human communities was driven by personal conflicts rather than large-scale battles.  http://www.bbc.co.uk/news/science-environment-23340252   They say their findings suggest that war is not an innate part of human nature, but rather a behaviour that we have adopted more recently.  “This research questions the idea that war was ever-present in our ancestral past. It paints another picture where the quarrels and aggression were primarily about interpersonal motives instead of groups fighting against each other.”

The research team based their findings on isolated tribes from around the world that had been studied over the last century.

“About 12,000 years ago, we assume all humans were living in this kind of society, and that these kind of societies made up about for about 90% of our evolutionary path.”
“Most of these incidents of lethal aggression were what we call homicides, a few were feuds and only the minority could be labelled as war,”
“Over half the events were perpetrated by lone individuals and in 85% of the cases, the victims were members of the same society.”
“It questions the idea that human nature, by default, is developed in the presence of making war and that war is a driving force in human evolution.”