Russia's full-scale invasion of Ukraine, under cover of repeated threats to use nuclear weapons, has resurrected the fear of nuclear weapons and headlines about possible nuclear war. Now, Christopher Nolan's re-telling of the life of J. Robert Oppenheimer brings the story of nuclear weapons' creation to life courtesy of Hollywood. But what about the next instalment of the story? How we consign nuclear weapons to the dustbin of history—the same way we have done with other weapons of mass destruction? Fortunately, the first step in that process is already underway. As with chemical and biological weapons, an international treaty has...