A spiritual biography, this book chronicles the journey of Margarito Bautista (1878–1961) from Mormonism to the Third Convention, a Latter-day Saint (Mormon) splinter group he fomented in 1935–1936, to Colonia Industrial/Nueva Jerusalén, a polygamist utopia Bautista founded in 1947. It argues that Bautista embraced Mormon belief in indigenous exceptionalism in 1901 and rapidly rose through the ranks of Mormon priesthood until convinced that the Mormon hierarchy was not invested in the development of native American peoples, as promoted in the Church’s canon. This realization resulted in tensions over indigenous self-governance within the Church of Jesus Christ of Latter-day Saints (Mormon Church) and Bautista’s 1937 excommunication. The book contextualizes Bautista’s thought with a chapter on the spiritual conquest of Mexico in 1513 and another on the arrival of Mormons in Mexico. In addition to accounts of Bautista’s congregation-building on both sides of the U.S. border, this volume includes an examination of Bautista’s magnum opus, a 564-page tome hybridizing Aztec history and Book of Mormon narratives, and his prophetic plan for the recovery of indigenous authority in the Americas. Bautista’s excommunication catapulted him into his final spiritual career, that of a utopian founder. In the establishment of his colony, Bautista found a religious home, free from Euro-American oversight, where he implemented his prophetic plan for Mexico’s redemption. His plan included obedience to early Mormonism’s most stringent practices, polygamy and communalism. Bautista nonetheless hoped his community would provide a model for Mexicans willing to prepare the world for Christ’s millennial reign.