Polygamy (called plural marriage by Mormons in the 19th century or the Principle by modern fundamentalist practitioners of polygamy) was practiced by leaders of The Church of Jesus Christ of Latter-day Saints (LDS Church) for more than half of the 19th century and practiced publicly from 1852 to 1890 by between 20 and 30 percent of Latter-day Saint families. Today, various denominations of fundamentalist Mormonism continue to practice polygamy.

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