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One of the most disturbing facts about American marriage today is that while divorce increased at similar rates for the wealthy and the poor in the 1960s and ’70s, those rates diverged sharply starting around 1980. According to the sociologist Steven P. Martin, among Americans who married between 1975 and 1979, the 10-year divorce rate was 28 percent among people without a high school education and 18 percent among people with at least a college degree: a 10 percentage point difference. But among Americans who married between 1990 and 1994, the parallel divorce rates were 46 percent and 16 percent: an astonishing 30 percentage point difference.
The problem is not that poor people fail to appreciate the importance of marriage, nor is it that poor and wealthy Americans differ in which factors they believe are important in a good marriage. The problem is that the same trends that have exacerbated inequality since 1980 — unemployment, juggling multiple jobs and so on — have also made it increasingly difficult for less wealthy Americans to invest the time and other resources needed to sustain a strong marital bond.
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