For most of human history, the world was a mysterious place ruled by forces beyond our understanding. The rise of science made materialism our ruling paradigm, calling into question whether our souls might be illusions. Now technology has again reframed the core questions of existence—identity, knowledge, the purpose of life—and they urgently require answers. Serving as a guide to the territory we are all entering, Meghan O'Gieblyn draws deeply and sometimes humorously from her own experience as a former believer still haunted by questions of faith.