As president of the Church of Jesus Christ of Latter-day Saints and Utah's first territorial governor, Brigham Young (1801-77) shaped a religion, a migration, and the American West. He led the Saints to Utah, guided the establishment of 350 settlements, and inspired the Mormons as they weathered unimaginable trials and hardships. Although he generally succeeded, some decisions, especially those regarding the Mormon Reformation and the Black Hawk...