Ryan A. Musto is the Director of Forums and Research Initiatives with the Global Research Institute (GRI) at William & Mary.

He is currently completing a book manuscript on the international history of regional nuclear weapon free zones. With his work, Ryan seeks to better understand the geopolitical and geostrategic dynamics that lead to proposals for regional denuclearization and determine their outcome. He also looks to further situate nuclear weapons within our understanding of the global north-south divide. Ultimately, Ryan aims to produce works of “applied history” that can inform contemporary efforts towards the completion of denuclearized zones and nuclear arms control more broadly.

Ryan served as a MacArthur Nuclear Security Postdoctoral Fellow with CISAC from 2020 - 2022. He has also served as a Stanton Nuclear Security Postdoctoral Fellow at the Massachusetts Institute of Technology (MIT) and as a Nuclear Security Fellow with the Fundação Getúlio Vargas (FGV) in São Paulo, Brazil. His work has been published in Diplomatic History, Cold War History, Diplomacy & Statecraft, Bulletin of the Atomic Scientists, Arms Control Today, and Americas Quarterly, amongst other outlets. Ryan is a frequent contributor to the Wilson Center’s Nuclear Proliferation International History Project (NPIHP).

Ryan holds a Ph.D. in history from The George Washington University, master’s degrees in international and world history from Columbia University and the London School of Economics, and a B.A. (hons.) in history from New York University (NYU).