[Vigilanteman]

Correct. I believe Idaho and Utah were required to forsake plural marriage in perpetuity due to a large Mormon population. Oklahoma was required to do the same due to a large Native American population. Arizona had both.

Existing plural marriages were grandfathered in. Oklahoma and Arizona, because they were among the last of the lower 48, had legal plural marriages on the books until the 1970s, when the last of the grandfathered marriage partners passed.

In short, a much longer precedent than the currently stylish gay marriages.

[Jim from C-Town]

Well, yeah! NEVER in history has the union of two men or two women been regarded as marriage. Yet, polygamy was, if not the norm, very popular in many cultures throughout history as well as many cultures today.