The 49th edition of the SIPRI Yearbook analyses developments in 2017 in: - Security and conflicts - Military spending and armaments - Non-proliferation, arms control and disarmament. The SIPRI Yearbook contains extensive annexes on the implementation of arms control and disarmament agreements, and a chronology of events during the year in the area of security and arms control.

On January 27, 2017, President Donald Trump directed Secretary of Defense James Mattis to initiate a new Nuclear Posture Review (NPR). The President made clear that his first priority is to protect the United States, allies, and partners. He also emphasized both the long-term goal of eliminating nuclear weapons and the requirement that the United States have modern, flexible, and resilient nuclear capabilities that are safe and secure until such a time as nuclear weapons can prudently be eliminated from the world.The United States remains committed to its efforts in support of the ultimate global elimination of nuclear, biological, and chemical weapons. It has reduced the nuclear stockpile by over 85 percent since the height of the Cold War and deployed no new nuclear capabilities for over two decades. Nevertheless, global threat conditions have worsened markedly since the most recent 2010 NPR, including increasingly explicit nuclear threats from potential adversaries. The United States now faces a more diverse and advanced nuclear-threat environment than ever before, with considerable dynamism in potential adversaries' development and deployment programs for nuclear weapons and delivery systems.

The 52nd edition of the SIPRI Yearbook analyses developments in 2020 in security and conflicts; military spending and armaments; non-proliferation; arms control; and disarmament.

Russia's nuclear forces consist of both long-range, strategic systems-including intercontinental ballistic missiles (ICBMs), submarine-launched ballistic missiles (SLBMs), and heavy bombers-and shorter- and medium-range delivery systems. Russia is modernizing its nuclear forces, replacing Soviet-era systems with new missiles, submarines and aircraft while developing new types of delivery systems. Although Russia's number of nuclear weapons has declined sharply since the end of Cold War, it retains a stockpile of thousands of warheads, with more than 1,500 warheads deployed on missiles and bombers capable of reaching U.S. territory. Doctrine and Deployment During the Cold War, the Soviet Union valued nuclear weapons for both their political and military attributes. While Moscow pledged that it would not be the first to use nuclear weapons in a conflict, many analysts and scholars believed the Soviet Union integrated nuclear weapons into its warfighting plans. After the Cold War, Russia did not retain the Soviet "no first use" policy, and it has revised its nuclear doctrine several times to respond to concerns about its security environment and the capabilities of its conventional forces. When combined with military exercises and Russian officials' public statements, this evolving doctrine seems to indicate that Russia has potentially placed a greater reliance on nuclear weapons and may threaten to use them during regional conflicts. This doctrine has led some U.S. analysts to conclude that Russia has adopted an "escalate to de-escalate" strategy, where it might threaten to use nuclear weapons if it were losing a conflict with a NATO member, in an effort to convince the United States and its NATO allies to withdraw from the conflict. Russian officials, along with some scholars and observers in the United States and Europe, dispute this interpretation; however, concerns about this doctrine have informed recommendations for changes in the U.S. nuclear posture. Russia's current modernization cycle for its nuclear forces began in the early 2000s and is likely to conclude in the 2020s. In addition, in March 2018, Russian President Vladimir Putin announced that Russia was developing new types of nuclear systems. While some see these weapons as a Russian attempt to achieve a measure of superiority over the United States, others note that they likely represent a Russian response to concerns about emerging U.S. missile defense capabilities. These new Russian systems include, among others, a heavy ICBM with the ability to carry multiple warheads, a hypersonic glide vehicle, an autonomous underwater vehicle, and a nuclear-powered cruise missile. The hypersonic glide vehicle, carried on an existing long-range ballistic missile, entered service in late 2019.

China’s approach to nuclear deterrence has been broadly consistent since its first test in 1964, but it has recently accelerated nuclear force modernization. China’s strategic environment is likely to grow more complex, and nuclear constituencies are gaining a larger bureaucratic voice. Beijing is unlikely to change official nuclear policies but will probably increase emphasis on nuclear deterrence and may adjust the definition of key concepts.

This volume brings together an international group of distinguished scholars to provide a fresh assessment of China's strategic military capabilities, doctrines, and its political perceptions in light of rapidly advancing technologies, an expanding and modernizing nuclear arsenal, and increased great-power competition with the United States.

“An excellent contribution to the debate on the future role of nuclear weapons and nuclear deterrence in American foreign policy.” ―Contemporary Security Policy This book is a counter to the conventional wisdom that the United States can and should do more to reduce both the role of nuclear weapons in its security strategies and the number of weapons in its arsenal. The case against nuclear weapons has been made on many grounds—including historical, political, and moral. But, Brad Roberts argues, it has not so far been informed by the experience of the United States since the Cold War in trying to adapt deterrence to a changed world, and to create the conditions that would allow further significant changes to U.S. nuclear policy and posture. Drawing on the author’s experience in the making and implementation of U.S. policy in the Obama administration, this book examines that real-world experience and finds important lessons for the disarmament enterprise. Central conclusions of the work are that other nuclear-armed states are not prepared to join the United States in making reductions, and that unilateral steps by the United States to disarm further would be harmful to its interests and those of its allies. The book ultimately argues in favor of patience and persistence in the implementation of a balanced approach to nuclear strategy that encompasses political efforts to reduce nuclear dangers along with military efforts to deter them. “Well-researched and carefully argued.” ―Foreign Affairs

The authors assess alternatives for a next-generation intercontinental ballistic missile (ICBM) across a broad set of potential characteristics and situations. They use the current Minuteman III as a baseline to develop a framework to characterize alternative classes of ICBMs, assess the survivability and effectiveness of possible alternatives, and weigh those alternatives against their cost.

In this timely retrospective, leading voices from The Washington Post come together to discuss Barack Obama’s historic presidency. When President Obama was elected, he was a figure of hope for many Americans. Throughout his presidency, he has become far more than a symbol of change; he has enacted countless programs and policies that have made an impact on the country. As his term comes to an end, we look back on what has defined Obama as an American leader. Providing insight into everything from his politics to his family, this collection of articles examines the highlights of the Obama administration. The award-winning journalists at The Washington Post have brought together stories from the last eight years to commemorate the indelible mark our most recent president has made on the United States. Featuring over a hundred historic photos and articles from eight Pulitzer Prize winners, Obama’s Legacy is the perfect way to close out the first family’s years in the White House.