actually , i have been lurking here and listening for some time. what you, panookah , are saying is backed up by several reports I have read.

it is like cave men really did have an inbuilt biologically functioning taboo against killing their own kind. Two Neanderthal groups ,or whatever, that met across a clearing would most probably yell and holler at each other, lobbing sticks and stuff until one or other of them broke and fled.

Two bands of babboons will behave similarly. We just are not inate killers, but modern warfare makes it easier to blow up a plane or a ship in the distance that to take out somebody in hand to hand combat.