> An individual human without any of the support provided by larger organized groups is only able to exist at quite primitive levels, as any number of pieces of post-apocalyptic fiction can portray.
This guy may be a math genius, but he should at least pay minimal respect to the thousands of people who have studied human cultures, societies and civilizations, and to their findings, before coming up with a post about groups of people based on what "post-apocaliptic fiction" has portrayed. As an anthropologist, I just stopped taking his ideas seriously at that point.