Nuclear Issues

Joseph Nye considers lessons from his own work on preventing the spread of nuclear technology in the 1970s.

Mohammad Tabaar analyzes Iran's strategy to weaken Israel and divide the Middle East.

While prosecuting its invasion of Ukraine, Russia has relied heavily on nuclear threats, turning the war in Ukraine into a dangerous nuclear crisis with profound implications for the global nuclear order and its two constitutive systems of nuclear deterrence and nuclear restraint. These two interconnected systems, each aiming to manage nuclear possession and reduce the risk of nuclear use, are at once complimentary and contradictory. While tensions between these systems are not new, the war in Ukraine exacerbates them in unprecedented ways. The system of nuclear deterrence seems to be proving its worth by inducing restraint on Russia and NATO, while the system of restraint is undermined by demonstrating what happens to a country not protected by nuclear deterrence. The latter lesson is particularly vivid given Ukraine’s decision to forgo a nuclear option in 1994 in exchange for security assurances from nuclear powers. Russia’s use of nuclear threats as an enabler for escalation and the specter of Russian tactical nuclear use against Ukraine goes well beyond its declared nuclear doctrine. The outcome of the war in Ukraine thus has critical importance for deciding the value of nuclear weapons in global security architecture and for resolving the conundrum between the systems of deterrence and restraint.

Stephen Walt offers a tentative and far-from-comprehensive survey of what scholars have to say about the war in Ukraine.

Stephen Walt asks whether the United States is a good model for other liberal states and whether its policy judgments are ones that others should trust and follow, especially with respect to foreign policy.  He argues that—on balance—the answer to both questions is "no."

No great breakthroughs or dramatic developments were expected at the Biden-Putin summit, and none was achieved. But the message was clear: There is a new sheriff in town. Putin noticed, describing Biden as very different from Trump—experienced, balanced, and professional.

With concerns and uncertainties regarding Iran’s nuclear future persisting to this day, this paper seeks to review the TRR negotiations and the context in which they unfolded in order to capture some of the lessons of negotiating with Iran regarding its nuclear program, primarily from the viewpoint of senior U.S. officials involved at the time. The paper is also informed by the personal perspective of one of the authors (Poneman) who led the U.S. delegation in the 2009 Vienna talks, and who, prior to this publication, had not publicly elaborated on his experience. The other author (Nowrouzzadeh), who supported the TRR talks in an analytical capacity within the U.S. Department of Defense, also conducted an extensive interview with Poneman as part of their collaboration on this paper. By drawing on existing literature and recent interviews with several senior U.S. officials involved in the negotiations now that over ten years have passed, the authors seek to draw useful lessons from this episode that can assist policymakers in understanding Iran’s nuclear decision-making and in their continued efforts to shape the future trajectory of Iran’s nuclear program.

A comparative analysis of the United States’ and the Soviet Union’s previously underexplored radiological weapons programs identifies the drivers behind their rise and demise. The findings of this analysis illuminate the factors likely to affect the pursuit of radiological weapons by other states in the future.