There haven't been any spinsters mentioned in reports from this case. Is there a duty for these men to provide a husband for each woman ?
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Originally, this is what Bigamy Young claimed, when people mentioned that he had 56 wives (or however many that was): he said that (a) all women by LDS scripture should be bound or sealed to a man in order to attain a decent place in Heaven (b) and a lot of husbands died before their wives, so (c) he married them out of Christian charity so as to comply with (a).
I have heard nothing about what spinsters in the FLDS Church. Perhaps they see a duty to widows, perhaps they don't. Maybe all the young women are married off, perhaps the undesireable ones are driven off like the excess boys. There is always the possibility that some sweet young thing gets knocked up and the potential sister wives can't stand her. I have no idea what might happen in such a case.
Eventually, it is always possible that some smart woman will escape from this compound and sell an entertaining book and get on Oprah and do the whole Nine Yards Tour. "I was a Sex Slave in the FDLS" or something like that. Soon to be a Major Motion Picture.
There is already a TV series on a polygamous marriage, called "Big Love".
As a Missourian and a history buff, I know that the main reason that the non-Mormons were so utterly disliked in Missouri was that most of the locals were illliterate squatters who held no title to the lands they occupied. The Mormons were literate, and they had two really annoying features about them: (1) they tended to get revelations about how a piece of land some local hick was farminy was granted to them by the Lord, and they would go file a deed on it, and quite often enlist the aide of the Danites (Mormon militia) to scare said illegally squatting hick off, and (2) they would romance some local gal and marry her as their second, third or fourth wife. This also tended to piss off the local hicks. Again, the Danites were better organized than the posses composed of local hicks.
Eventually a governor was elected by a large number of annoyed hicks, who said that his main platform was to drive the Mormons out of Missouri, and I believe he added that anyone killing a Mormon man would not be prosecuted. Nearly all the Mormons except those in Independence who gave up polygamy fled to Nauvoo, Illinois at that point.
And yes, I know that his real name was Brigham Young. But Bigamy Young is a more fun thing to call him. Mark Twain agreed with me on this.