Yes, I’ve seen it. It presents a case for Paleolithic people pragmatically avoiding warfare in a world of low population. At some point in time competition for resources had occasions where warfare was seen as a viable option. Perhaps the very survival of a group was seen to depend upon it. The world now has a population approaching eight billion.
I would prefer a peaceful cooperative world, but not at a cost of the death of over seven billion people to create a world that supports it as it seems to have in the distant past. There seems to be advocacy for that at with the Georgia Guidestones group though, but they are obscure. In interpersonal experiences I see cooperation easier with smaller groups than large ones.
People respond more to fear of loss than to the possibility of gain so the adage “better to be a warrior in a garden than to be a gardener in a war” leads to standing armies among people with no desire for war. If the true nature of mankind is peace and cooperation does it matter in a practical sense today in the world that we live in where pragmatism now seems to drive militarism?