Networked NonproliferationThe Treaty on Non Proliferation of Nuclear Weapons (NPT) had many opponents when, in 1995, it came up for extension. The majority of parties opposed extension, and experts expected a limited extension as countries sought alternative means to manage nuclear weapons. But against all predictions, the treaty was extended indefinitely, and without a vote. Networked Nonproliferation offers a social network theory explanation of how the NPT was extended,