His previous career experience includes teaching at the University of Reading (UK) from 2007-12, serving on the faculty of the Defense and Strategic Studies Department at Missouri State University from 2001-07, and working as a Senior Analyst with the National Institute for Public Policy. Dr. Walton is the author of three books: Grand Strategy and the Presidency: Foreign Policy, War, and the American Role in the World (Routledge, 2012); Geopolitics and the Great Powers in the Twenty-first Century: Multipolarity and Revolution in Strategic Perspective (Routledge, 2007); and The Myth of Inevitable U.S. Defeat in Vietnam (Frank Cass/Routledge, 2002), as well as a co-author of Understanding Modern Warfare (Cambridge University Press, 2008).