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.

2023 marked eighty years since the wartime adoption of the BRUSA Agreement between Great Britain and the United States. This 1943 document codified the growing relationship between
U.S. and U.K. signals intelligence organizations and included policies governing the exchange of personnel and joint regulations for handling sensitive material. Security directives and protocols aligned operational processes between the democratic governments, setting new cooperative standards for nation-states battling authoritarian regimes. 

From July 11-12, 2023, NATO leaders gathered in Vilnius, Lithuania for one of the most significant NATO summits in history. This timely brief by Eric Rosenbach, Grace Jones, and Olivia Leiwant serves as a background piece on Ukraine’s history with NATO, potential future pathways for accession, and the operational impact Ukraine’s NATO membership could have on the alliance. 

Given the potential for a long war this paper offers an assessment of key economic and political factors which will help define Ukraine’s capacity to effectively resist Russian aggression, occupation, and ultimately strengthen affected sectors of society. It offers corresponding recommendations for policymakers in Washington and Europe. 

In an interconnected world, cyberattacks are becoming more frequent and sophisticated. Building resilience against this asymmetric threat is critical for countries to protect their economies, critical infrastructure, and democratic institutions. However, cyberattacks do not respect borders, and no country can address this threat alone. The strength and longevity of the transatlantic partnership between the EU and the U.S. presents a unique opportunity to address this strategic threat through international cooperation. Through an analysis of cyberwarfare in the ongoing war in Ukraine, this paper proposes policy recommendations to enhance transatlantic coordination and cooperation against current and future adversaries in a new era of strategic competition. Ultimately, a stronger transatlantic partnership is critical for protecting international democratic norms, building resilience against cyber threats, and strengthening global security and stability.

Three factors are likely to have contributed to shaping Putin’s decision to launch the invasion one year ago.

In the past year, it has been vital to keep in mind one axiom that has become a cliché: the fog of war is dense and thickened by disinformation and propaganda. To ensure we have our feet on a solid foundation as we try to interpret the latest news from Ukraine, we created a weekly Report Card. 

Using insights from the Sexual Violence in Armed Conflict (SVAC) dataset, this policy brief outlines key trends in the use of sexual violence in Russia’s war against Ukraine between 2014 and 2021, describing the reported perpetrators, where it occurred, and what forms it took.

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.