First of all, we're not chimps, and no, they mostly don't fight each other very often. This sort of half-baked pseudo-science written (invariably) by men who don't know much about chimps is just a dominance hierarchy system trying to justify itself.
“In the chapter called Why the Legend of the Killer Ape Never Dies Robert W. Sussman points out, “By 2004, there had been only 17 suspected and 12 “observed” cases of adult chimpanzee-chimpanzee killings reported from four of nine chimpanzee long-term research sites. This spanned a total of 215 years of combined observer time at these sites and yields a maximum rate of one chimpanzee killing every 7.5 years.” (p. 104)
In most cases, unless one group of chimps is vastly bigger and stronger than another, they never even get close to each other in the wild, but instead will pant-hoot at each other from afar. In fact, chimps rarely patrol the edges of their territory, preferring to keep more to the center, where they are less likely to encounter strangers. As is noted in Chimpanzees, Warfare, and the Invention of Peace, a chapter written by Michael L. Wilson, “Because aggression generally involves costs, animals usually avoid getting into direct fights if they can (Fry & Szala, chapter 23). Instead, they threaten and display at their rivals. If they do get into a direct fight, animals usually seem content to chase rivals off rather than pursuing, capturing, and killing them. Fatal fights may occur, however, when the value of the resource is particularly high, or when the fighters do not expect to live long, or when the cost of killing their opponent is low.” (p. 363)”
There is no archeological or other evidence of war before 10k years ago - most anthropologists recognize the Lake Turkana incident as the first war.
This is my area of expertise, and I've already come across plenty of the so-called evidence for constant human fighting. It really, really does not hold up to scrutiny, but thanks for your comment.
