This book focuses on an even more urgent and “inconvenient truth” than global warming. At the nuclear precipice, humanity’s choices are catastrophe or transformation. This book explores the present nuclear predicament, and how to step away from the precipice and assure humanity’s future. It examines the intersections between international law and national policies; and between nuclear proliferation, nuclear terrorism and nuclear disarmament. The book offers a way out if policy makers of leading countries can summon the vision and political will to move in a new direction.