Polygamy (called "plural marriage" by Mormons in the 19th century or "the Principle" by modern fundamentalist practitioners) was taught by leaders of The Church of Jesus Christ of Latter-day Saints (LDS Church)[REF] and practiced publicly from 1852 to 1890.
Interviewed by Time magazine about his book, Michael Coogan said that, from a strict literalist view, fundamentalist Mormons are right about polygamy [REF].