Family members of YFZ Ranch Bishop Merril Jessop take a break before dinner for their extensive family at his home on the YFZ Ranch. Jessop is currently under indictment for conducting the marriage of an underage girl - his daughter Marianne - to the FLDS leader Warren Jeffs. The Fundamentalist Church of Jesus Christ of Latter Day Saints is one of the largest Mormon fundamentalist denominations and one of United States' largest practitioners of plural marriage. The FLDS Church emerged in the early 1900s when its founding members left The Church of Jesus Christ of Latter-day Saints. The split occurred largely because of the LDS Church's renunciation of polygamy and its decision to excommunicate practitioners of plural marriage.