Um, even if we assume that the implied authorship of the New Testament is valid, then you’re talking about the teachings of a Hellenized Jew who went by the name of Paul. Also, I Corinthians is a response to issues in II Corinthians and issues of sexual congress brought up therin. So, what you’ve referred is the teachings of an early Christian philosopher, not the teachings of Jesus. Jesus really doesn’t talk that much about sexuality except in a couple of cases, and most of those are more indirect and could be argued that they concern more the breaking of a vow made in the name of God as opposed to a direct commentary on sexual morality.
Personally, Paul had some interesting points, but his letters reflected one opinion among many and need to be read in context.
Regarding the topic in general, I’ve been to a lot of countries that permit polygamy and polyandry (marriages of one woman to multiple men). The results most often fall into two categories – in those societies that are brushing against or striving to enjoy the benefits of what we might call modern civilization*, such as what we see in parts of Islamicised Africa and Islamic western Asia, it’s all just a very tiny minority of rich guys doing what rich and powerful guys have always done – have a lot of sexual partners. They have simply added a legal and ethical justification to the matter. While you will always find a family that is happy in said situation, in my personal travels and observations, I can’t really see any benefit to society overall (the excess of young men unable to marry, a point brought up earlier in this thread, is just one example of the negative effects).
Now, when you have very isolated societies that allow plural marriages (most commonly polygamy and in a few cases polyandry), it’s a different story. Family interrelations are very complex, the pattern of death is completely different to anything we’re familiar with in our lives…and I do make a big assumption there but considering everyone reading this is literate, has a computer, and access to the internet, I would bet that my assumption isn’t off the mark. In those tiny societies, the sharing of work and defense of the greater family/clan unit tends to mean that plural marriages can help the overall family unit and society in general survive and thrive.
In regards to how this question affects us, again I say there will be a few people who can pull such a relationship off and have a relatively happy and successful family, but my opinion based on abovementioned observations is that overall it’s a friggin’ disaster. In theory, it CAN be argued that there’s nothing morally or ethically wrong with the matter, free association and all that, but in reality the majority of said associations are in sub-cultures that are extremely oppressive towards women.
I’m generally libertarian in mentality, but this is a perfect example of how the logical mind can come to a conclusion that in reality fails utterly. Yeah, what you do in your home is nobody else’s business, leave people alone, etc…but most examples of polygamy in, say, the United States, that make it to the public eye do not seem like pleasant relations and as I said are often oppressive. So by being libertarian you unintentionally foster the establishment of an authoritarian micro-culture.
Now all that said…my view is that the government should not have ANY say in marriage at all. It’s a system of control that can be used to manipulate populations. By dangling a few tax benefits out there the government thus gets one more finger into our private lives and ths issue of marriage and who can marry whom can be used to divide a population into petty bickering. Marriage should be a private matter…person A, person B, and God or gods if that’s your kick.
As an incidental side-note to all of this, I think that if government legalized plural marriages, nothing would really change. A few people might make a thing of it, but it would be mostly the Jerry Springer types, and it would not destabilize society because through most of history, government reflects society and morality – it does not define society and morality. Yes, there are always some people who will always try to make government define society, and those folks can make a lot of people miserable, but it’s not the usual way of things. People would not suddenly start getting married to multiple partners if the matter were legalized, just as you would not have a statistically higher level of substance abuse if some or all presently illegal drugs were legalized. A little flare up here and there, sure, but after the ‘news’ and other mass media outlets have their shocker stories, people would go right on doing what they were doing before.
- – (I avoid the term western civilization because places like Japan and China are well part of the overall model of what in the back of our minds we consider western civilization – they are no longer just imitators but both countries fully contribute to the modern global economic-society)