The rate of single parenting is in turn the single most significant predictor of social immobility

The Atlantic reports:

According to the Harvard political scientist Robert Putnam, 60 years ago just 20 percent of children born to parents with a high-school education or less lived in a single-parent household; now that figure is nearly 70 percent. Among college-educated households, by contrast, the single-parent rate remains less than 10 percent. Since the 1970s, the divorce rate has declined significantly among college-educated couples, while it has risen dramatically among couples with only a high-school education—even as marriage itself has become less common. The rate of single parenting is in turn the single most significant predictor of social immobility across counties, according to a study led by the Stanford economist Raj Chetty.

One interesting article.