The Fundamentalist Church of Jesus Christ of Latter-Day Saints (FLDS) is a religious group that split from the mainstream Latter-Day Saints movement, also known as Mormonism. Founded in the early 20th century, the FLDS continues to practice polygamy, which was officially abandoned by the mainstream church in 1890. The group believes in living a strict interpretation of the Book of Mormon and other scriptures. The FLDS is known for its close-knit communities, primarily located in Utah and Arizona. Members often follow a patriarchal structure, with a focus on family and community values. The church has faced legal challenges and scrutiny due to its practices, particularly regarding child marriage and welfare issues.