"Complex societies have collapsed many times before. It has not always been a bad thing. As James C Scott points out in his fascinating book, Against the Grain, when centralised power began to collapse, through epidemics, crop failure, floods, soil erosion or the self-destructive perversities of government, its corralled subjects would take the chance to flee. In many cases they joined the “barbarians”. This so-called secondary primitivism, Scott notes, “may well have been experienced as a marked improvement in safety, nutrition and social order. Becoming a barbarian was often a bid to improve one’s lot.” The dark ages that inexorably followed the glory and grandeur of the state may, in that era, have been the best times to be alive."