Your reply was informative, and to the point. Thank you.

As for the last part:
Then why not legalize bigamy to overcome the problem other than criminalizing it. Actually, people like Mormons in western counties will continue it practice it, causing injustice to "unofficial wives" in heritage or any other benefits an official wife is entitled to get.

Anyway, to save your effort, pls look in page 1 for these key words to find more informative replies like yours:
1- One reality 9(by the_dude))
2- while encompassing the betterment (by MissX)
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"The larger grows the island of my knowledge, the
longer stretch the shores of my ignorance."