Don't be ridiculous. Even in Eurasian societies, saying that an all-consuming bloodbath like World War II was the same as the minor dustups between clans or dukes in the 15th century because "war is war" is preposterous.
Here's the trick. Non-agricultural societies can't make "war" as you think of it. Agriculture makes war both possible and necessary. Possible because it allows the excess population needed to non-productive stuff like soldiering. Necessary because when your food supply needs to grow in a field, you MUST hold that field. Hunter-gatherers, faced with a serious threat to the existence of the tribe, just move. They're semi-nomadic by nature.
Oh sure they did not have the all consuming bloodbaths. Nevertheless they were men... and they had wars. Just as cruel and sometimes crueler. Gangfights... yup... along with the scalping, mutilating, killing, pillaging, raping, etc.