I think its interesting that a practice that is so "abhorrent" to marriage can persist throughout a large portion of the bible, and yet God never condemns it.
Does this suggest that Christians can witness sin and not condemn it either?
* First Polygamist mentioned - Lamech in Genesis 4 v 19. Now, he was a descendant of Cain and he killed someone for wounding him. His bigamy, however, passes without adverse comment.
* Abraham, the first Hebrew, and ancestor of all Israel, had three wives, namely Sarah and her servant Hagar (see Genesis 16 v 3), and Keturah, as well as a number of concubines (Genesis 25 v 6).
* Esau, Abraham's grandson, had three wives - Judith, Bashemath (Genesis 26 v 34) and Mahalath (Genesis 28 v 9)
* Jacob, father of the twelve tribes of Israel had Rachel and Leah, who were sisters, as his wives, see Genesis 29, and their servants Bilhah and Zilpah in Genesis 30. Without these four wives there would be no Israel.
* Gideon, mighty man of God and judge of Israel, who defeated the Midianites, and whose name is now used to distribute Bibles worldwide, had 70 sons, "for he had many wives" - Judges 8 v 30
* In 1 Samuel 1 v 2 Elkanah has two wives, Hannah and Peninah. Hannah gives birth to the prophet Samuel.
* King David, a man after God's own heart, had plenty of wives, namely Michal in 1 Samuel 18 v 27, and Ahinoam, Abigail, Maacah, Haggith, Abital, and Eglah in 2 Samuel 3, and last but not least, Bathsheba in 2 Samuel 11 v 27.
When condemned for committing adultery with Bathsheba, God reminds him of the many things he has given him, including "thy master's wives into thy bosom..." (2 Samuel 12 vv 7&8). So it looks like God not only allowed polygamy but actively supported it.
* Solomon had three hundred wives and seven hundred concubines, according to 1 Kings 11 v 3, but we'll not list their names. He wrote the Song of Solomon, a celebrated poem about marital love, to his 141st wife (see Song of Solomon 6 v 8)
* Ashur had two wives, Helah and Naarah in 1 Chronicles 4 v 5.
* Rehoboam had 18 wives and sixty concubines, making him another busy man, according to 2 Chronicles 11 v 21.
* Abijah had 14 wives, see 2 Chronicles 13 v 21.
* Joash had two wives chosen for him by Jehoida the priest according to 2 Chronicles 24 v 3.
* In Jeremiah 3 vv 6-10 and 31 vv 31-32 God himself is portrayed as a polygamist.
* In Ezekiel 23 God portrays himself as a polygamist, married to two sisters, Jerusalem and Samaria, who commit adultery against him.
* The Old Testament had rules regulating polygamy and limiting its application in certain circumstances. Kings of Israel weren't supposed to "multiply wives" to themselves according to Deuteronomy 17 v 17. You weren't supposed to take a woman's sister to be her "rival wife" while she was still living - Leviticus 18 v 18. And you weren't to marry both a woman and her mother - Leviticus 20 v 14.
*
Polygamy was recognised and regulated by the Law of Moses. Just like normal marriage, polygamy has its fair share of problems, and the law intervenes in
Deuteronomy 21 vv 15-17 to make sure that children get what they're entitled to.
http://www.btinternet.com/~familyman/biblpoly.html
Why would God regulate polygamy under the law and not condemn it if he felt it was wrong? Instead of legally deconstructing it, why doesn't he ban it?