High Quality Content by WIKIPEDIA articles! Polygamy, or plural marriage, in the Church of Jesus Christ of Latter Day Saints probably originated with the founder of Mormonism, Joseph Smith, Jr., who taught that polygamy (or at least polygyny) was a divine commandment. Smith practiced it personally, by some accounts marrying as many as 30 women. Evidence for Smith`s position is provided by "sealing" records, public marriage licenses (in many cases notarized), affidavits, letters, journals and diaries, but Smith and the leading church quorums denied that he preached or practiced polygamy. Smith`s son Joseph Smith III, his widow Emma Smith, and the Reorganized Church of Jesus Christ of Latter Day Saints (RLDS, now called the Community of Christ) challenged the evidence and taught that Joseph Smith had opposed polygamy. They instead claimed that Brigham Young introduced plural marriage.