He is the author of Capital, the State, and War: Class Conflict and Geopolitics in the Thirty Years’ Crisis, 1914-1945 (University of Michigan Press, 2014), for which he was awarded the Sussex International Theory Prize, and co-author (with Kerem Nişancıoğlu) of How the West Came to Rule: The Geopolitical Origins of Capitalism (Pluto, 2015). He has also (co-)edited and contributed to: Historical Sociology and World History: Uneven and Combined Development over the Longue Durée (Rowman & Littlefield, 2016), with Kamran Matin; Race and Racism in International Relations: Confronting the Global Colour Line (Routledge, 2015), with Nivi Manchanda and Robbie Shilliam; and, Cataclysm 1914: The First World War and the Making of Modern World Politics (Brill Press, 2015).