Reports & Papers

Russia's 2022 invasion of Ukraine illuminated the long profound shadow of nuclear weapons over international security. Russia's nuclear threats have rightfully garnered significant attention because of the unfathomable lethality of nuclear weapons. However, the use of such weapons in Ukraine is only one way—albeit the gravest— that Russia could challenge the global nuclear order. Russia's influence extends deep into the very fabric of this order—a system to which it is inextricably bound by Moscow's position in cornerstone institutions such as the Nuclear Non-Proliferation Treaty (NPT) and the International Atomic Energy Agency (IAEA). From withdrawing from key treaties to stymieing resolutions critical of misconduct, Moscow has demonstrated its ability to challenge the legitimacy, relevance, and interpretations of numerous standards and principles espoused by the West.

In this American Academy of Arts and Sciences study, Rebecca Davis Gibbons, Stephen Herzog, Wilfred Wan, and Doreen Horschig unpack the challenges to the global nuclear order posed by the Russian war against Ukraine. On February 24, 2022, Russia invaded nonnuclear-armed Ukraine and leveraged threats with its nuclear arsenal as a “shield” to deter third-party intervention. The well-publicized horrors on the ground in Ukraine are, unfortunately, not the only consequences of Russia’s full-scale invasion of its neighbor. The war is having unmistakable effects on how governments, scholars, and the public think about nuclear arms. Not only has Moscow reintroduced the world to the often-unsavory realities of nuclear deterrence, but its suspension of the New Strategic Arms Reduction Treaty (START) and deratification of the Comprehensive Nuclear-Test-Ban Treaty (CTBT) have been setbacks for arms control and disarmament. Meanwhile, vulnerable states around the globe may be further incentivized to develop nuclear weapons or seek protection from nuclear-armed patrons to avoid being invaded like Ukraine. Given these changing geopolitical circumstances, how might the Russian war on Ukraine affect the global nuclear order? The authors in this publication conclude that the United States and the broader international community must now more seriously engage with alternatives to traditional arms control, nonproliferation, and disarmament endeavors. Specifically, the authors discuss the increasing prominence of approaches such as the Treaty on the Prohibition of Nuclear Weapons (TPNW)—popularly known as the Nuclear Ban—and risk reduction measures. They assess whether these initiatives can have an impact in reducing nuclear dangers. Additionally, they examine temptations for states to pursue more forceful counterproliferation measures and describe the risks of doing so.

The world has grown more dangerous but also less open to arms control measures that could limit some of the dangers. What can be done? Steven E. Miller offers a tour de force overview of both dismal and hopeful trends within arms control over the past decades, in this first paper of a new HCSS series on Arms Control.

In the World Nuclear Industry Status Report 2021, Mariana Budjeryn writes about the Chernobyl disaster 35 years later, while Ali Ahmad writes about nuclear power and climate change resilience.

The international community, acting through the OSCE Minsk Group, has been unable to induce the leaders of Armenia and Azerbaijan to resolve the Karabakh conflict, which began in 1988 and burst into a new round of fighting in September 2020. Leaders and populations on both sides had become increasingly maximalist; any leader willing to compromise could be branded a traitor. The 2020 fighting drastically changed facts on the ground. With Turkey’s assistance, Azerbaijan recovered much of the land it lost a generation previously. But Azerbaijan was compelled to permit Russia to deploy a large peacekeeping force, something it had resisted for 25 years. While its authority is diminished, the Minsk Group can play a role going forward in restoring confidence and communication between the sides, opening borders, and ultimately leading negotiations on the future status of the region.

On December 5, 1994, leaders of the United States, the United Kingdom, and the Russian Federation met in Budapest, Hungary, to pledge security assurances to Ukraine in connection with its accession to the Treaty on the Nonproliferation of Nuclear Weapons (NPT) as a non-nuclear-weapons state. The signature of the so-called Budapest Memorandum concluded arduous negotiations that resulted in Ukraine’s agreement to relinquish the world’s third-largest nuclear arsenal, which the country inherited from the collapsed Soviet Union, and transfer all nuclear warheads to Russia for dismantlement. The signatories of the memorandum pledged to respect Ukraine’s territorial integrity and inviolability of its borders, and to refrain from the use or threat of military force. Russia breached these commitments with its annexation of Crimea in 2014 and aggression in eastern Ukraine, bringing the meaning and value of security assurance pledged in the Memorandum under renewed scrutiny.

On the occasion of the 25th anniversary of the memorandum’s signature, the Project on Managing the Atom at the Belfer Center for Science & International Affairs at the Harvard Kennedy School, with the support of the Center for U.S.-Ukrainian Relations and the Harvard Ukrainian Research Institute, hosted a conference to revisit the history of the Budapest Memorandum, consider the repercussions of its violation for international security and the broader nonproliferation regime, and draw lessons for the future. The conference brought together academics, practitioners, and experts who have contributed to developing U.S. policy toward post-Soviet nuclear disarmament, participated in the negotiations of the Budapest Memorandum, and dealt with the repercussions of its breach in 2014. The conference highlighted five key lessons learned from the experience of Ukraine’s disarmament, highlighted at the conference.