Here’s an article from Slate that was recently circulating on social media, in which the feminist author Jillian Keenan argues in favor of legalizing polygamy.

Recently, Tony Perkins of the Family Research Council reintroduced a tired refrain: Legalized gay marriage could lead to other legal forms of marriage disaster, such as polygamy. Rick Santorum, Bill O'Reilly, and other social conservatives have made similar claims. It's hardly a new prediction—we've been hearing it for years. Gay marriage is a slippery slope! A gateway drug! If we legalize it, then what's next? Legalized polygamy?

We can only hope.

. . .

–Jillian Keenan, Legalize Polygamy!
Slate 15 April 2013.

Of course polygamy should be legal. Every form of marital relationship among consenting adults ought to be legal. If you advocate for the freedom of same-sex couples to marry, you ought to advocate for the freedom of people to marry as many or as few other people as they want, too. FRC thinks this is a reductio for same-sex marriage rights. Actually, it’s a positive reason for everyone to take a more expansive view of sexual and marital freedom.

Regulating marriage is one of the most ridiculous pretenses that the state engages in. The state’s activity in controlling marriage licenses has its historical basis in nothing other than massively invasive efforts to preserve the hetero-patriarchal social status quo (and, in the past, the racial status quo as well), and something that ought to be rooted out utterly. Where there’s no victim, there’s no crime, and where there’s no crime, there’s no reason for legal intervention. (You might ask, If there’s no reason for legal intervention here, why is there any reason for legal licensing at all? And of course, the answer is that there isn’t. Marriage licenses ought to be abolished entirely. The only reason that states issue them to some people is so that they can deny them to others. To hell with that.)

We have a tendency to dismiss or marginalize people we don't understand. We see women in polygamous marriages and assume they are victims. "They grew up in an unhealthy environment," we say. "They didn't really choose polygamy; they were just born into it." Without question, that is sometimes true. But it's also true of many (too many) monogamous marriages. Plenty of women, polygamous or otherwise, are born into unhealthy environments that they repeat later in life. There's no difference. All marriages deserve access to the support and resources they need to build happy, healthy lives, regardless of how many partners are involved. Arguments about whether a woman's consensual sexual and romantic choices are "healthy" should have no bearing on the legal process. . . .

The definition of marriage is plastic. Just like heterosexual marriage is no better or worse than homosexual marriage, marriage between two consenting adults is not inherently more or less "correct" than marriage among three (or four, or six) consenting adults. Though polygamists are a minority—a tiny minority, in fact—freedom has no value unless it extends to even the smallest and most marginalized groups among us.

–Jillian Keenan, Legalize Polygamy!
Slate 15 April 2013.