A new frontier in civil unions ?
Well, shoot - that's not much of a flashback ....
Let's try a little further back .... like 1830

http://mormon-polygamy.org/mormon_history
... or the ongoing polyglut in islam ... that's a tad further back ....
Or we could go to the book of Kings - Who were those two fine examples of monogamy back then .... Saul and David come to mind ....
LOL - just playin' with ya, Due - Don't have any flashback music to accompany that history, howsomever - I kinda pass on the mtc (mormontabernaclechoir) stuff and not too many hymns address the issue (surprise, surprise).
Oh well ... nothing new under the sun after all, eh ?
PS: Why any man in his right mind would have more than one wife at a time, or civil union, is way beyond this aggie's understanding. Hell - one of 'em is enuf ta drive a sane man nuts.

Finally, brethren, whatsoever things are true, whatsoever things are honest, whatsoever things are just, whatsoever things are pure, whatsoever things are lovely, whatsoever things are of good ...