I will disagree about the polygamy though. The New Testament gives us an example of the nuclear family in the make-up of Jesus, Mary, and Joseph. It is the standard and basis of Christianity, upon which society rests. There is also the example of Mary's parents, Anne and Joachim, which gives another subtle outline of Christian marriage.
There are likewise examples of polygyny in the Bible...
I think you misunderstood me.
1. It was my fundamental contention that "marriage" is based on human reproductive biology and outside of government's authority to regulate.
2. There is no outright prohibition concerning polygyny in the Bible at all (this is not found in the Old or New Testament anywhere). There is no prohibition in any religious text. The actual words of Jesus in the Gospel makes no mention of the issue for Jews or Christians. In fact, the Old Testament is explicit in it's permitting of polygyny.
3. If marriage is based on human reproductive biology, is outside of government authority to regulate, and is a religious institution - - then only the churches may regulate marriage. Some may not like this idea, however, the churches that venture outside of accepted tradition will ultimately fail, they will not have any congregation to support them.
Furthermore, abolishing non-profit status for religious institutions will keep the institutions alive that people actually actively support. There are too many organizations and false churches kept alive by the non-profit crutch.
I'm not saying I support something by discussing the issue, but it is imperative that a biological basis for marriage is established. This makes the issue of homosexual marriage null and void...