“It’s not that marriage is making people be richer than it used to, it’s that marriage is becoming an increasingly elite institution, so that people are are increasingly only getting married if they already have economic advantages,” says Philip Cohen, a professor of sociology at the University of Maryland, College Park. “Marriage does not make people change their social class, it doesn’t make people change their race, and those things are very big predictors of economic outcomes.”

This reframing of the issue may explain why fewer men than women find partners, even though men are more likely to be looking for one. The economic pressures on men are stronger. Research has shown that an ability to provide financially is still a more prized asset in men than in women, although the trend is shifting. Some studies go so far as to suggest that the 30-year decrease in the rate of coupling can be attributed largely to global trade and the 30-year decrease in the number of stable and well-paying jobs for American men that it brought with it.

When manufacturing moved overseas, non-college educated men found it more difficult to make a living and thus more difficult to attract a partner and raise a family.