The world just passed a surprisingly positive milestone on nuclear weapons

Photographers and camera crew on Eniwetak Atoll in the Marshall Islands during the Koa nuclear test as part of Operation Hardtack, a series of 35 nuclear tests conducted by the United States in 1958. | Galerie Bilderwelt/Getty Images

The post-war international order may be tearing apart at the seams and international law is increasingly looking like a polite fiction, but we did just pass one notable milestone of global peace and stability: As of this month, the world has gone the longest time...