In this book, Halldorf analyzes the life and leadership of the Swedish Pentecostal leader Lewi Pethrus (1884–1974), a monumental figure in modern Scandinavian religious history, while focusing on the politics of the Swedish Pentecostal movement. In this, he engages the work of Max Weber and draws particularly on Luke Bretherton’s understanding of the concept politics as wider than merely party politics. Here, politics is determined by the understanding of the nature of the common life; the structures that sustain this common life; and the relational and communicative practices that enable a common life that includes friends, strangers, and enemies. Pentecostalism is often understood as an apolitical movement that turned to politics in the 1970s and then partnered with right-wing parties. If that account holds true for US Pentecostalism, it does not for the Swedish Pentecostal movement. Halldorf illustrates how Pethrus, the father of the movement, became politically involved as early as the 1940s and started a political party in 1964. Unlike his later American counterparts, though Pethrus was culturally conservative, he favored a progressive economic politics. The strength and vitality of Swedish Pentecostalism challenges the image of Sweden as the world’s most secular country.