This book takes on the much-debated nuclear zero objectives—exploring the serious policy questions around them and delineating the best practical steps for the nuclear nations to take to achieve them. It raises the urgent questions that need to be addressed and proposes some of the answers that need to be sought in the years ahead by world leaders, politicians, NGOs, and scholars. Beginning with the history of the nuclear zero movement, Getting to Zero documents the successes and failures of six decades of attempts to control nuclear weapons proliferation, lays out the past decisions of the major nuclear states that form the context for the current initiatives, and analyses the policies of the regional powers—both nuclear and "potentially nuclear"—that will frame the prospects for getting to nuclear zero.