Many of us conjure up images of a post-apocalyptic world where life is simple, our needs and goals clear: starting fires, building shelters. Begley argues that most apocalyptic collapses are not abrupt cataclysms but the results of enduring crisis, such as drought, disease, or war. He discusses the various scenarios that could lead to mass migration, from climate change to political collapse, and how we might prepare for them. First and foremost, we'll need to learn how to navigate the complex social and political dynamics that will inevitably emerge as migration, food shortages, and war bring out our most primal instincts.