He is also a former director of the Centre for American Studies at the University of Western Ontario. He holds his Ph.D. in international history from Cambridge University and is the author of Hegemony and culture in the origins of NATO nuclear first-use (Palgrave-Macmillan, 2005). He is currently working on an international history of the “crisis of liberalism” in the North Atlantic world between 1880 and 1920.