PHILADELPHIA

THE great myth about divorce is that marital breakup is an increasing threat to American families, with each generation finding their marriages less stable than those of their parents.

Last week’s release of new divorce statistics led to a smorgasbord of reporting feeding the myth. This newspaper warned readers, “Don’t stock up on silver anniversary cards” because “women and men who married in the late 1970s had a less than even chance of still being married 25 years later.” And apparently things are getting worse, as “the latest numbers suggest an uptick in the divorce rate among people married in the most recent 20 years covered in the report, 1975-1994.” Other major newspapers ran similar articles.

The story of ever-increasing divorce is a powerful narrative. It is also wrong. In fact, the divorce rate has been falling continuously over the past quarter-century, and is now at its lowest level since 1970. While marriage rates are also declining, those marriages that do occur are increasingly more stable. For instance, marriages that began in the 1990s were more likely to celebrate a 10th anniversary than those that started in the 1980s, which, in turn, were also more likely to last than marriages that began back in the 1970s.

Why were so many analysts led astray by the recent data? Understanding this puzzle requires digging deeper into some rather complex statistics.