BY was on FIRE w/polygamy!
1) 50+ wives, 50+ children
2) BY taught "Adam-God Doctrine," that Adam was God the Father and Eve was one of his plural wives. He taught that for every plural wife a man has, she will be the literal Eve of that earth and the man the literal Adam. The church dropped his teaching after his death and they removed the hymn he had commissioned about the doctrine. There's a quote by Spencer W. Kimball in the 1970s asking members to stop teaching that Adam-God (BY) doctrine.
3) BY taught that the only way to the 3rd degree of the celestial kingdom was for polygamists -- where eternal creation happens.
4) BY made statements that polygamy would never be taken from the earth, etc.
check out https://missedinsunday.com/category/memes/polygamy/ for some sad/funny church leader quotes (some not so long ago)