Very interesting and informative articles. Anyone who wants to know about the human "Id" should read some of them or watch a video of chimp behavior.
Everything I know of human history and biology indicates to me that violence is sort of hard-wired in man.
There is indeed evidence of violence in hunter gatherers; it's just, in my opinion, that the research on the Kung is what has gotten a lot of "play" in the media and even in academia itself, possibly because it fits the preferred meme about hunter-gatherers as types of "The Noble Savage".
There is an interesting book that came out this year called "Troubled Times: Violence and Warfare in the Past" which examines a lot of these issues.
One of the chapters is on what the author, David Traynor, calls the "Massacre at Ofnet". Ofnet is a Mesolithic site dated to five hundred years before these Neolithic sites but in the same general part of the world. The statistics on who was killed at Ofnet compared to the Neolithic site at Talheim are interesting. There's also a comparison to a New World hunter gatherer group in California.
https://books.google.com/books?id=s...v=onepage&q=Ofnet-Mesolithic massacre&f=false
I think climate change and the competition for resources is a big factor in all of this, although competition for status and women played a part as well. We can see it in the "counting coup" practice in some North American Indian tribes. Sometimes these practices became ritualized and "spiritualized".
https://en.wikipedia.org/wiki/Counting_coup
Other chapters in the book look at the issue in terms of other sites and cultures around the world.