I'm surprised nobody has mentioned Peter Turchin, as another 'pop-sci' author with some speculative theories. It is a counter theory on why civilizations 'Col

I'm surprised nobody has mentioned Peter Turchin, as another 'pop-sci' author with some speculative theories. It is a counter theory on why civilizations 'Collapse'. Since this thread seems so opposed to the 'environmental' causes of collapse that Diamond proposes, the Turchin theories on how societies naturally go through stages that lead to collapse is interesting second train of thought.