Today's Fundamentalist Mormons in the American West resist assimilation like their forefathers. Centered on faith, they survive despite efforts to permanently end their cherished plural family arrangements. While some Fundamentalists like Warren Jeffs go rogue and corrupt their beliefs in heinous crimes, most hold steadfastly to a religion they say is biblical and restored by the first Latter-day Saint prophet, Joseph Smith, in the early 1800s. Mormon historians Craig Foster and Marianne Watson present more than two hundred photos and exclusive insights to explain how an estimated thirty thousand Fundamentalist Mormons still venerate a much-debated legacy—despite its difficult challenges—and persist in living plural marriage.