Preface /Joseph I. Coffey -- Quo vadis? / Joseph I. Coffey -- Part I introduction / Joseph I. Coffey -- Why states go -- and don't go -- nuclear / William Epstein -- How states can "go nuclear" / Frank C. Barnaby -- What happens if ...? Terrorists, revolutionaries, and nuclear weapons / David Kreiger -- Safegard against diversion of nuclear material: an overview / Ryukichi Imai -- Reducing the incentives to proliferation / George H. Quester -- Part II introduction / Joseph I. Coffey -- Nth powers of the future / Ashok Kapur -- Nuclear proliferation and world politics / Lewis A. Dunn -- Arms control in a nuclear armed world? / Colin Gray -- The United Nations, the superpowers, and proliferation / Abraham Bargman -- Proliferation and the future: destruction or transformation? / Frederick C. Thayer -- Decision making in a nuclear armed world / Michael Brenner -- The United States in a world of nuclear powers / Michael Nacht.