What has God said about polygamy?

Unlike most folks here, I have never had a problem with polygamy (under any of its names). I haven't been looking for it in the Bible because it doesn't pertain to me, but I don't recall reading anything in the Bible that precludes it. Given the veiled nastiness in another thread towards a member here who is polygamous, I figured we ought to have that discussion and put aside any personal bias and see what God has to say about it. Let's see if we can keep it biblical.

Now I had to use Google, because like I said...I've never run across anything in the Bible that explicitly forbids it as I have with other things that God considers sin. Here is a brief look at what I found: http://ift.tt/1EDvmnm

Quote:

Even though one can not possibly determine God’s will by examining the actions and behavior of man, or even God’s response to some of these actions, the major points made by pro-polygamists are Examples of Biblical Polygamists: There are multiple historical accounts of Biblical polygamists. [Note there are only about eighteen specific examples of polygamy throughout the Old Testament, of which several clearly present polygamy in a negative light]. God gave David Saul’s Wives: The prophet Nathan speaking for God confronting David with the murder of Uriah the Hittite said that he (God) had given David Saul’s wives. [2 Samuel 12:8] No Explicit Condemnation: Nowhere in the Bible does God explicitly condemn polygamy, the only "condemnation" being implicit and by example. In fact marriages to additional spouses are considered valid in the Scriptures (Jesus’ lineage did not always go through the first wife). Regulation of Polygamy: Some laws in the Pentateuch do appear to place God’s stamp of approval on polygamy. For example note the rules and guidelines concerning the treatment of multiple wives (specifically prohibiting ill-treatment of the first wife after a second marriage) and the inheritance of the first born, if he happened to be the son of a less favored, wife. "If he takes another wife to himself, he shall not diminish her food, her clothing, or her marital rights, [Exodus 21:10] If a man have two wives, the one beloved, and the other hated, and they have borne him children, both the beloved and the hated; and if the first-born son be hers that was hated; then it shall be, in the day that he causeth his sons to inherit that which he hath, that he may not make the son of the beloved the first-born before the son of the hated, who is the first-born: [Deuteronomy 21:15-17]

Having spent a portion of my life around poly folks (not Christian ones by any stretch of the imagination), I am taken aback by someone using Christianity to justify what even the poly community considers as the armpit of relationship types, and who wants to meet women half his age who are beautiful or above average in looks. Even so, it isn't the polygamy part that troubled me, it was more that the ad read like "ISO hot, bi, babe."

Although I have referenced the other thread, I really don't want this to be about a particular person or calling anyone out. Let's talk about polygamy and what God says about it, m'kay?

What has God said about polygamy?