I don't think there is a lot of evidence to support that. Ive read that war was mostly a product of agriculture, which led to famines and stores of food easy to

I don't think there is a lot of evidence to support that. Ive read that war was mostly a product of agriculture, which led to famines and stores of food easy to steal. But regardless, when hunter gatherers did go to war, they fought other tribes. Internal conflict is much less common. In a group where everyone knows each other and depends on each other for survival, war makes no sense. Groups of humans that didnt cooperate within a tribe would have died out long ago. Such an environment will hopefully have plenty of resources. At least of food and water and other necessities. Which also reduces the motivation for war and conflict.