How does this jive with the inland Papuan tribes in Papua New Guinea? They were quite isolated and from what I read they can be just as violent (of course, not on the scale of mechanized slaughter by moderns)

> Papuan tribes

The smallest definition of a tribe is usually 500 people. They can be 10 tines that size. Tribes did not exist until about 10,000 years ago. They were preceded by hunter-gatherer bands.

The inland Papuan group most associated with violence are the Enga, but they are not migratory hunter-gatheree bands. They are farmers who grow sweet potatoes and raise pigs.