I am a Professor of International Relations. I joined the University of Arizona in August 2013, having previously held faculty positions at University College London (2007-2013) and Colorado State University (2006-2007). My research addresses aspects of the causes and geography of violent and nonviolent political conflict - including terrorism, protests and riots, civil war, and international wars. My work has been published at (amongst others) Journal of Politics, British Journal of Political Science, International Studies Quarterly, Journal of Peace Research, Criminology, and Journal of Quantitative Criminology. I also published a book, Conflict Hotspots: Emergence, Causes, and Consequences, with Ashgate Press in July 2010. These publications collectively demonstrate that incidents of violent political conflict cluster in space and time, that openings in political opportunity structures encourage the contagion of violence between groups and across national borders, and that terrorist groups commonly exploit so-called spoiler opportunities in an attempt to derail plans for peace. My research has been generously supported by grants from the Minerva Initiative (Department of Defense), the Engineering & Physical Science Research Council (EPSRC UK), the Economic & Social Science Research Council (ESRC UK), the Nuffield Foundation, the British Academy, Apple Inc., and the Airey Neave Trust.