He holds appointments at the University of Western Sydney, The Austarlian National University, and the University of NSW at the Australian Defence Force Academy. His recent major publications include, the Empire of Civilization: the Evolution of an Imperial Idea (University of Chocago press, 2009), and the 4-volume edited collection, Civilization: Critical Concepts (Routledge, 2009). He is an Associate Editor of the 6-volume, Berkshire Enclclopedia of World History (2010), edited by William H. McNeil.