I am currently working on the following projects:

1) The Violence of War

Published works include Absolute War: Violence and Mass Warfare in the German Lands, 1792-1820 (OUP, 2017), The People's Wars: Histories of Violence in the German Lands, 1820-1888 (OUP, 2017), Combatants, Civilians and Cultures of Violence (a special issue of History, 2016), Making Sense of Military Violence (a special issue of Cultural History, 2017, co-edited with Matthew D'Auria), and Making Sense of Violence: Intellectuals, Writers and Modern Warfare (a co-edited special issue of the European Review of History, 2018).

2) Birth of a Nation: Germany, 1848-1888

I have published one volume of this project to date: Nationalism in Germany, 1848-1866: Revolutionary Nation (Palgrave Macmillan, 2010). 'The Old Forms are Breaking Up, ... Our New Germany is Rebuilding Itself': Constitutionalism, Nationalism and the Creation of a German Polity during the Revolutions of 1848-49' came out in the English Historical Review in 2010.

3) Nationalism, Globalization and Europeanism

Publications include Germany and the Modern World, 1880-1914 (CUP, 2018), Europe in Crisis: Intellectuals and the European Idea, 1917-1957 (Berghahn, 2012), co-edited with Matthew D'Auria, and What is a Nation? Europe, 1789-1914 (OUP, 2006), co-edited with Timothy Baycroft. 

4) International Relations and the Outbreak of the First World War

Publications: Germany and the Causes of the First World War (Bloomsbury, 2004) and 'Germany and France before the First World War: A Reassessment of Wilhelmine Foreign Policy', English Historical Review, 115 (2000).

5) Historical Theory

Publications: History and Causality (Palgrave Macmillan, 2014) and, with E. Akyeampong, C. Arni, P. K. Crossley and W. H. Sewell, 'Explaining Historical Change; or, The Lost History of Causes', American Historical Review, 120 (2015).