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Susan Colbourn is an international historian interested in the global Cold War, transatlantic relations, alliance politics, nuclear history, and archival declassification. At present, she is a Henry Chauncey Jr. '57 postdoctoral fellow at International Security Studies at Yale University.

Her current book project examines the rise and fall of the intermediate-range nuclear force arms race – the ‘Euromissiles Crisis’ – and its impact on the Atlantic Alliance, considering the interplay between East-West and West-West relations and the role of social movements and anti-nuclear activism.

She received her Ph.D. in History from the University of Toronto in spring 2018. Prior to her doctoral studies, she received an MA from the London School of Economics and Political Science and an Hon. BA from Trinity College at the University of Toronto.

She tweets about history and politics at @secolbourn and co-edits a blog on Canadian international history, Canadian Eyes Only.