After 15 years of US efforts to combat terror and achieve stability in Yemen, a new study by Saferworld concludes that these efforts—as in the cases of Afghanistan andSomalia—have badly backfired. Today, Yemen requires not more military intervention, but strategies to counter corrupt and abusive government and to show its people that their security and rights matter.

Why is war a more common occurrence in some parts of Yemen than in others? Why do cities like Aden recover quickly from wars? And why do their youth rush to clean up streets and restore normalcy? Why do wars quickly cease in cities like Taiz and Ibb, but are quick to flare up over and over around Sanaa? It is basically a matter of the economy. In the tribal North, where a war economy prevails, tribes thrive on conflicts.…