Since the end of the Cold War, significant attention has focussed on the issue of nuclear deterrence and in particular whether formal nuclear security guarantees from nuclear weapons states to non-nuclear weapons states involving the possible use of nuclear weapons have a place in the twenty-first century global strategic landscape. Growing support for nuclear disarmament in the US and elsewhere has seen serious doubts being raised about the ongoing utility of extended nuclear deterrence. This book provides the first detailed analysis of the way in which extended nuclear deterrence operates in contemporary Asia. It addresses the following key questions: What does the role of extended nuclear deterrence in Asia tell us about the broader role of extended nuclear deterrence in the contemporary international system? Is this role likely to change significantly in the years ahead? O’Neil uses a theoretical and historical framework to analyse the contemporary and future dynamics of extended nuclear deterrence in Asia and challenges many of the existing orthodox perspectives on the topic. Providing a new perspective on debates surrounding extended nuclear deterrence, this book will be of interest not only to students and scholars of Asian politics, international relations and security studies, but also to policy makers and professionals.

Since the end of the Cold War, significant attention has focussed on the issue of nuclear deterrence and in particular whether formal nuclear security guarantees from nuclear weapons states to non-nuclear weapons states involving the possible use of nuclear weapons have a place in the twenty-first century global strategic landscape. Growing support for nuclear disarmament in the US and elsewhere has seen serious doubts being raised about the ongoing utility of extended nuclear deterrence. This book provides the first detailed analysis of the way in which extended nuclear deterrence operates in contemporary Asia. It addresses the following key questions: What does the role of extended nuclear deterrence in Asia tell us about the broader role of extended nuclear deterrence in the contemporary international system? Is this role likely to change significantly in the years ahead? O’Neil uses a theoretical and historical framework to analyse the contemporary and future dynamics of extended nuclear deterrence in Asia and challenges many of the existing orthodox perspectives on the topic. Providing a new perspective on debates surrounding extended nuclear deterrence, this book will be of interest not only to students and scholars of Asian politics, international relations and security studies, but also to policy makers and professionals.

For close to sixty years, the United States has maintained alliances with Japan and South Korea that have included a nuclear umbrella, guaranteeing their security as part of a strategy of extended deterrence. Yet questions about the credibility of deterrence commitments have always been an issue, especially when nuclear weapons are concerned. Would the United States truly be willing to use these weapons to defend an ally? In this book, Terence Roehrig provides a detailed and comprehensive look at the nuclear umbrella in northeast Asia in the broader context of deterrence theory and U.S. strategy. He examines the role of the nuclear umbrella in Japanese and South Korean defense planning and security calculations, including the likelihood that either will develop its own nuclear weapons. Roehrig argues that the nuclear umbrella is most important as a political signal demonstrating commitment to the defense of allies and as a tool to prevent further nuclear proliferation in the region. While the role of the nuclear umbrella is often discussed in military terms, this book provides an important glimpse into the political dimensions of the nuclear security guarantee. As the security environment in East Asia changes with the growth of North Korea's capabilities and China's military modernization, as well as Donald Trump's early pronouncements that cast doubt on traditional commitments to allies, the credibility and resolve of U.S. alliances will take on renewed importance for the region and the world.

From the dawn of the atomic age to today, nuclear weapons have been central to the internal dynamics of US alliances in Europe and Asia. But nuclear weapons cooperation in US alliances has varied significantly between allies and over time. This book explores the history of America’s nuclear posture worldwide, delving into alliance structures and interaction during and since the end of the Cold War to uncover the underlying dynamics of nuclear weapons cooperation between the US and its allies. Combining in-depth empirical analysis with an accessible theoretical lens, the book reveals that US allies have wielded significant influence in shaping nuclear weapons cooperation with the US in ways that reflect their own, often idiosyncratic, objectives. Alliances are ecosystems of exchange rather than mere tools of external balancing, the book argues, and institutional perspectives can offer an unprecedented insight into how structured cooperation can promote policy convergence.

Are NATO’s mutual security commitments strong enough today to deter all adversaries? Is the nuclear umbrella as credible as it was during the Cold War? Backed by the full range of US and allied military capabilities, NATO’s mutual defense treaty has been enormously successful, but today’s commitments are strained by military budget cuts and antinuclear sentiment. The United States has also shifted its focus away from European security during the wars in Afghanistan and Iraq and more recently with the Asia rebalance. Will a resurgent Russia change this? The Future of Extended Deterrence brings together experts and scholars from the policy and academic worlds to provide a theoretically rich and detailed analysis of post–Cold War nuclear weapons policy, nuclear deterrence, alliance commitments, nonproliferation, and missile defense in NATO but with implications far beyond. The contributors analyze not only American policy and ideas but also the ways NATO members interpret their own continued political and strategic role in the alliance. In-depth and multifaceted, The Future of Extended Deterrence is an essential resource for policy practitioners and scholars of nuclear deterrence, arms control, missile defense, and the NATO alliance.

The Long Shadow investigates the purposes and roles of nuclear weapons in the new security environment, the nature and content of the national nuclear strategies of relevant states, and their implications for international security and stability in the Asian security region

If the nuclear weapons club were to further expand, would Americas democratic allies in Northeast Asia be among the next entrants? Japan, South Korea and Taiwan all have robust civilian nuclear energy programmes that make them virtual nuclear powers according to many analysts. All three once pursued nuclear weapons and all face growing security threats from nuclear-armed adversaries. But will they or rather, under what circumstances might they? This book analyses these past nuclear pursuits and current proliferation drivers. In explaining the nuclear technology that the three now possess, it considers how long it would take each to build a nuclear weapon if such a fateful decision were made. Although nuclear dominoes Northeast Asia cannot be ruled out, the author does not predict such a scenario. Unlike when each previously went down a nuclear path, democracy and a free press now prevail as barriers to building nukes in the basement. Reliance on US defence commitments is a better security alternative -- as long as such guarantees remain credible, an issue that is also assessed. But extended deterrence is not a tight barrier to proliferation of sensitive nuclear technologies. Nuclear hedging by its Northeast Asian partners will challenge Washingtons nuclear diplomacy.