Observing the same phenomenon in multiple tribes doesn't imply it happened everywhere all the time. The question the author originally tries to answer is why no large society developed anywhere for hundreds of thousands of years.
It might be if the phenomenon is a result of perfectly reasonable competitive behaviors in a given previously fairly common ecology.
When you consider pre-medieval eastern Europe is basically the same as this primitive dynamics plus a technology to build a wall and ability to temporarily plant some seeds and harvest them outside in between the raids.
Third part of musings of this author gives failry clear path from that dynamic into modern times as new technologies and population densities demanded more and more men to be cast out of warrior role into subservient worker role.
