Why is polygamy illegal?

The history of Utah provides an interesting view of this issue. As many people know, Utah was founded (as a European-descended community) by the Mormon pioneers that first arrived in 1847. As early as the 1830s, the Mormons started practicing polygamy but did so without announcing it publicly. read more

Switzerland: Polygamy is illegal by law. But polygamous marriage conducted in another country may be accepted or rejected on a case-by-case basis. Ukraine; United Kingdom: Foreign polygamous marriages grant some welfare benefits only, but this is being phased out with the introduction of Universal Credit. read more

And in the Utah sisters' case, flaunting their violation of state law on national TV may spark legal action by state prosecutors to show the public that polygamy is in fact illegal and that state laws mean something. read more

It's strange to me that so many people from the Judeo-Christian faith are opposed to gay marriage because they believe it is a sin, but yet some of the heroes of the Old Testament were polygamists and that has been illegal for years. read more