Currently, 3.7 million Americans call themselves "preppers," but millions more of us are prepping for disaster without knowing it. Bradley Garrett argues that prepping is a rational response to global, social, and political systems that are failing to produce credible narratives of continued stability. Traveling across four continents, Garrett meets those who are building panic rooms, stockpiling supplies, and burrowing deep into the earth. Even as Garrett shows that the bunker is all around us—in malls, gated communities, the vehicles we drive—he suggests that it is a mentality that is here to stay.