Analysis / ReportUnderstanding Opportunistic Aggression in the Twenty-First CenturyByKelsey Hartigan, Reja Younis and Lachlan MackenziePublished Jul 31, 2024The United States faces an increasingly contested strategic environment that raises significant, unanswered questions about the role nuclear weapons will play in U.S. national security strategy going forward, and the forces that will be required to deter—and, if necessary, defeat—adversaries. For the first time in its history, the United States must contend with not one…
Analysis / ReportThe Long Shadow: Russian Nuclear Calibration in the War in UkraineByHeather Williams, Kelsey Hartigan, Lachlan Mackenzie and Reja YounisPublished Feb 23, 2024How have Russia’s nuclear narratives evolved over the course of the war in Ukraine? To address this question and evaluate future nuclear risks, the CSIS Project on Nuclear Issues conducted a study on Russian nuclear signaling during the first 18 months of the war.
Analysis / CommentaryThinking about the Unthinkable: Five Nuclear Weapons Issues to Address in 2024ByKelsey HartiganPublished Feb 23, 2024The United States needs to address five key nuclear weapons challenges in 2024. Managing these challenges will require leadership and careful attention from the highest levels—a commodity that will no doubt be in short supply in 2024.
Analysis / ReportDeter and Divide: Russia’s Nuclear Rhetoric & Escalation Risks in UkraineByHeather Williams, Kelsey Hartigan, Lachlan Mackenzie and Reja YounisPublished Jan 11, 2024Russia’s nuclear threats have underpinned each stage of the war in Ukraine as Putin attempts to deter and divide NATO support. However, if Russia faces battlefield setbacks, its nuclear threats could intensify, testing NATO’s resolve.
Analysis Project Atom 2023ByHeather Williams, Kelsey Hartigan, Lachlan Mackenzie, Robert Soofer, Tom Karako, Oriana Skylar Mastro, Franklin Miller, Leonor Tomero and Jon WolfsthalPublished Nov 17, 2023A Competitive Strategies Approach for U.S. Nuclear Posture through 2035
Analysis / ReportReactions from the Next Generation: “The Fragile Balance of Terror: Deterrence in the New Nuclear Age”ByHeather Williams, Kelsey Hartigan, Nicholas Adamopoulos, Suzanne Claeys, Joseph Rodgers, Lachlan Mackenzie and Jess LinkPublished Jul 12, 2023As a follow-on to The Fragile Balance of Terror, the Project on Nuclear Issues (PONI) at the Center for Strategic and International Studies invited eight early- and mid-career experts to offer their reflections on the volume’s chapters and conclusions.
Analysis / ReportAlternative Nuclear Futures: Capability and Credibility Challenges for U.S. Extended Nuclear DeterrenceByHeather Williams, Kelsey Hartigan, Joseph Rodgers and Reja YounisPublished May 9, 2023The U.S. extended deterrence could change drastically in the next decade due to increasing nuclear threats from countries such as Russia, China, North Korea, and Iran. The credibility of U.S. security guarantees for its allies is at risk, and the CSIS Project on Nuclear Issues used an “alternative futures” approach to explore how this mission might be affected. In all scenarios explored, the United States faces a credibility problem that will require a new approach to consulting, planning, training, and operating with allies.
Analysis / CommentaryFuture Steps for U.S.-ROK Extended Deterrence ConsultationsByKelsey HartiganPublished Mar 8, 2023Defense Secretary Lloyd Austin travelled to South Korea last week to shore up U.S. extended deterrence commitments following President Yoon Suk Yeol’s comments about South Korea possibly developing its own nuclear weapons.