Jared Diamond notwithstanding, there is absolutely no evidence that top-down structures of rule are the necessary consequence of large-scale organization. Walter Scheidel notwithstanding, it is simply not true that ruling classes, once established, cannot be gotten rid of except by general catastrophe. To take just one well-documented example: around 200 AD, the city of Teotihuacan in the Valley of Mexico, with a population of 120,000 (one of the largest in the world at the time), appears to have undergone a profound transformation, turning its back on pyramid-temples and human sacrifice, and reconstructing itself as a vast collection of comfortable villas, all almost exactly the same size. It remained so for perhaps 400 years. Even in Cortés’ day, Central Mexico was still home to cities like Tlaxcala, run by an elected council whose members were periodically whipped by their constituents to remind them who was ultimately in charge.Possibly not the most interesting paragraph of Graeber and Wengrow's How to change the course of human history (at least, the part that’s already happened) - that's more likely to be the discussion of seasonal variation in prehistoric political structures, or the article's various vigorous myth demolitions - but certainly the one that made me laugh.