In a world of swift and sweeping cultural transformations, few have seen changes as rapid and dramatic as those experienced by the Urapmin of Papua New Guinea in the last four decades. A remote people never directly "missionized," the Urapmin began in the 1960s to send young men to study with Baptist missionaries living among neighboring communities. By the late 1970s, the Urapmin had undergone a charismatic revival, abandoning their traditional religion for a Christianity intensely focused on human sinfulness and driven by a constant sense of millennial expectation. Exploring the Christian...