My friend is a big fan of your show and would like to know why, given your Atheism, you still believe in marriage. His point of view is that marriage is a religious institution, so why would an atheist have anything to do with it? He asks if it's for a tax break, or if polygamy is somehow wrong for an atheist?
As a guy about to be married for the second time, I support the institution of marriage -- both gay and straight. I recommend you start by reading this article on Wikipedia:
Rights and responsibilities of marriages in the United States
Marriage carries with it a host of federal benefits assumed to be conferred automatically on each spouse. These prominently include:
- Numerous tax benefits, as you mentioned, including the right to file jointly
- Legal status with stepchildren
- joint parenting rights, such as access to children's school records
- family visitation rights for the spouse and non-biological children, such as to visit a spouse in a hospital or prison
- next-of-kin status for emergency medical decisions or filing wrongful death claims
- Survivor benefits on death
- Automatic recipient of life insurance for some jobs
- Tax-free transfer of property between spouses (including on death) and exemption from "due-on-sale" clauses.
Your friend is simply misinformed when he says that marriage is a religious institution. It isn't. Marriage existed long before religion got its hooks in it, and the fact that religious people today are going around demanding that their views of marriage ought to be "protected" is simply bunk, and pointless entanglement between church and state. A church can "marry" you in the sense that they can perform a ceremony, but unless you sign those legal papers that are recognized by lawyers (or in some states, meet various other requirements that make you married), you're not married in the eyes of the law, and that's where it counts.
As for polygamy: I'm on the fence about it, along with many other atheists. Legally, a contract between three people is much more complicated than a contract between two. For instance, what happens if person A wants to divorce person B, but still loves C, while B and C wish to remain married? Because it's so complex, I'm not pushing for legal polygamy. There is also the concern that polygamy as practiced is often used as a smokescreen for coercion and sex with minors, as in the recent case of epic scumbag Warren Jeffs. That's not okay, since it doesn't involve consenting adults who are in a legal position to make their own large life-changing decisions.
Having said that, I'm not particularly morally opposed to polygamy, as long as it's between consenting adults and as long as I don't have to sort out their legal affairs. I wouldn't do it, but other people can for all I care. In the absence of legal polygamy, I'm also not opposed to people being polyamorous. (Hat tip to Dan Savage's excellent podcast and column, where he discusses this regularly.) Fool around with other partners as much as you want, as long as nobody in the arrangement is deceived about what they're getting into.
Note that my description of it as legally acceptable doesn't amount to my recommending it as a good idea for anyone in particular. In the worst case, miscommunication could occur, jealousy could pop up, feelings could be hurt, and relationships could be broken. But as long as everybody's aware of that going in... you're adults, I'm not responsible for your therapy bills. :)