This book examines the state of the nuclear non-proliferation regime and the issues it faces in the early 21st century. Despite the fact that most countries in the world have signed the Non-Proliferation Treaty (NPT) there is growing concern that the NPT is in serious trouble and may not be able to stop the further spread of nuclear weapons. If so, international stability will be undermined, with potentially disastrous consequences, and the vision of a nuclear weapon-free world will become utterly unrealistic. More specifically, the NPT is exposed to four main challenges, explored in this...