Through juicy storytelling and cutting original research, Montell exposes the verbal elements that make a wide spectrum of communities “cultish,” revealing how they affect followers of groups as notorious as Heaven’s Gate, but also how they pervade our modern start-ups, Peloton leaderboards, and Instagram feeds. Incisive and darkly funny, this enrapturing take on the curious social science of power and belief will make you hear the fanatical language of “cultish” everywhere.