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Polygamy died a slow death and finally ended in May 1904. After years of fighting with the Feds, and numerous threats made by the US Government, the Church finally came to terms with their illegal (not to mention ungodly), way of life.
If God told Jeremiah that He didn’t send the false prophets, ask the Mormon if they believe God sent the false prophecies to the Mormon people.
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“We will not end the practice of plural marriage until the coming of the Son of Man.” — Wilford Woodruff as quoted by Journal of John Henry Smith, 21 May 1888, LDS Church Archives