The Rise of Gay Marriage and the Decline of Straight Marriage: Where's the Link?

The story behind the rise of gay tolerance, unwed mothers, and delayed marriage
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Let's talk about marriage. Today, young people get married later. There are more unwed mothers. And gay marriage is winning broad support.

These are three true things about marriage. But three true things about marriage don't necessarily have anything to do with one another.

The connection between the rise of gay marriage and the fall of straight marriage has been made, most notably, by Times columnist Ross Douthat, who has asked liberals to acknowledge that the mainstreaming of gay marriage just might have led the an increase in unwed moms and the decline of the institution, in general. This is dubious, for two big reasons. First, support for gay marriage is highest among higher-educated, and higher-earning people, who are less likely to have children out of wedlock. Second, if gay marriage were *behind* the rise of unwed mothers and delayed marriage, it would theoretically have to come first. But it didn't. As we'll see, out-of-wedlock births and delayed marriage were already underway before the 1990s, when gay acceptance suddenly exploded.

So let's ask three natural follow-up questions: When did support for gay marriage increase? Why are Millennials getting married later? And what's behind the rise of unwed mothers?

Where did gay tolerance come from?
(Starts with: Late Gen-Xers and Millennials growing up in an era of increasingly gay-friendly media)

As defenders of all strains of equality like to say, the arc of history is long, and it bends toward justice. But for gay marriage, it bent particularly quickly and shortly.

We're going to tell this story in charts. First, between the 1970s and early 1990s, there was practically no change in public attitudes towards gays. In the 20 years after 1990, the gap closed by an astounding 60 points.

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Practically NOBODY strongly supported gay marriage in the late 1980s. It was unheard of. Today, it's mainstream, and about half the gap closed before 2004. Remember: It wasn't until 2003 that the Supreme Court ruled that gay people shouldn't be thrown into prison for consensual sex -- in the same year, the British government officially allowed the teaching of "the acceptability of homosexuality." This was an incredibly rapid change.

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The public today is roughly evenly split over gay marriage, but when you break this down by age, you see the vast majority of resistance comes from older Americans, and support comes from the youngest.

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Big picture: Gay acceptance, which took off in the 1990s, led to gay marriage acceptance, which advanced in the last 20 years. By the time that late Gen-Xers and Gen-Yers reached young adulthood, the vast majority of them simply didn't care about homosexuality. It just wasn't a thing.

Mark McCormack, the author of The Declining Significance of Homophobia, attributed it to two factors that are essentially one factor, which is media exposure: (1) The rise in openly gay performers and characters normalized homosexuality for young kids listening to music and watching TV and movies; and (2) the Internet revealed to young people outside of liberal urban bastions that being gay simply wasn't that weird.

Why are there so many unwed (mostly lower-income) mothers?
(Starts with: Decline of low-income men combined with women empowered to make their own decisions about motherhood)
Between 1970 and 1990, out-of-wedlock births nearly tripled for black infants to 64 percent and sextupled to 18 percent for whites. (You can see the huge 1970-1990 increase in the picture below, from Family Facts:) This happened over two decades when attitudes toward homosexuality did not change by a single percentage point.

Screen Shot 2013-04-04 at 1.20.19 PM.pngThere are two empirical schools of thought here. First, there is an economic explanation for why more disadvantaged women would resist marriage. Second, there is a "tech shock" explanation for why more disadvantaged men would resist marriage.

One thing that changed is that low-income men got demolished in the labor market starting in the 1970s with the demise of manufacturing (and, later, retail hours) and marriage became an unappealing contract for their girlfriends. Poor men saw, by far, the largest drop in marriage rates. (This is the "they're not marriage material" argument, writ very large.)

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Poor women surrounded by men who more likely to be unemployed, underemployed, or incarcerated are ditching unions that might be seen as a financial drain. As William Julius Wilson argued, "high rates of unemployment and incarceration meant that the local dating pool was populated by unmarriageable men--and the result was that women chose to live independently."

But there's another answer that George A. Akerlof and Janet Yellen famously offered in a Brookings paper. In a sentence: Abortion and contraception laws empowered women to make decisions about keeping children, and this ironically freed men from the obligation to promise marriage to their sexual partners.

It's a clever, but somewhat complicated argument that comes down to the decline in shotgun marriages.

They write that "75 percent of the increase in the white out-of-wedlock first-birth rate, and about 60 percent of the black increase, between 1965 and 1990 is directly attributable to the decline in shotgun marriages." What in the world do the availability of contraceptives and the liberalization of abortion laws -- both late-60s/early-70s developments -- have to do with shotgun marriages? Shotgun marriages prevail in an environment where men and women assume that all pregnancies lead to children. But since the 1970s, sexual activity has increased without an expectation of marriage. Men realized that they didn't have to trade the promise of marriage-in-the-event-of-a-pregnancy for sex.

In their words: "By making the birth of the child the physical choice of the mother, the sexual revolution has made marriage and child support a social choice of the father." As unwed mothers became more common, they became more socially acceptable. This made it even easier for men and women to not marry in the event of a pregnancy: Nobody else was doing it, either.

Why are people getting married later?
(Starts with: More educated women and the Great Recession.)

Well, this is complicated. I mean, every question in this article is complicated, but this question is complicated. For a longer explanation, I'll direct you here.

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Derek Thompson is a senior editor at The Atlantic, where he writes about economics, labor markets, and the entertainment business.

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