A moving study of how religion shapes Western climate discourse.   Our ecological system is disturbed, and with it, every other system we’ve built to inhabit it. We do not face inevitable destruction, yet many of us cannot conceive of climate change as anything but the end of the world, an apocalypse with all its biblical trappings. Why? In A Perturbed System, anthropologist Susannah Crockford argues that we must understand the climate emergency as a spiritual crisis, a result of Christian colonialism that we (religious or not) still struggle to describe without religious language. Climate discourse in the United States and northern Europe, Crockford shows, is framed by the same theological motifs that drove extraction, including ideas about prophecy, mediation, sacrifice, original sin, cult, messiah, and apocalypse. By listening to people on the edge of the crisis, A Perturbed System reveals a world in transition, what happens when worlds end—ecologically, socially, politically, and personally—and how we might live through these endings together.