Everything that I have read about hunter-gatherer and tribal societies is that there was a fairly high level of background violence. Here's one study [1]. Bret Devreaux has an article on how Native American-like societies had a lot of small raiding. (I think it is in his "That Dothraki Horde" series.) There are a lot of stories of missionaries narrowly avoiding getting killed by at the border of tribe they were going to, indicating an expectation of attack and shoot first ask questions later tactic. (Some missionaries did, in fact get killed, notably Elizabeth Eliot's first husband.)
[1] https://news.tulane.edu/pr/new-study-reveals-long-history-vi...