The nuclear order seems to be falling apart. Gone is the uneasy balance between the cold war superpowers. We now face a slew of new nuclear actors. North Korea has reprocessed enough plutonium for perhaps ten bombs, in addition to the two it has already tested. Iran’s centrifuge program seems poised to produce weapons-grade uranium. And Syria was apparently constructing a clandestine nuclear facility, before it was destroyed by Israeli air strikes in 2007. It’s not just enemies that pose a problem.