It’s hard to imagine that there have been many younger divorcées — or braver ones — than a pint-size third grader named Nujood Ali.

Nicholas D. Kristof

Nicholas Kristof addresses reader feedback and posts short takes from his travels.

The cover of Nujood Ali’s book, which was a bestseller in France.

At her school in Yemen, Nujood received a visit from her publisher, Michel Lafon.

Nujood is a Yemeni girl, and it’s no coincidence that Yemen abounds both in child brides and in terrorists (and now, thanks to Nujood, children who have been divorced). Societies that repress women tend to be prone to violence.

For Nujood, the nightmare began at...