Author of several dozen chapters and papers on aspects of ancient Greek social, economic, political and military history. Editor of War and Violence in Ancient Greece (2000) and co-editor of Archaic Greece: new approaches and new evidence (1998), Brills’ Companion to Herodotus (2002), The Cambridge History of Greek and Roman Warfare (two vols. 2007), A Companion to Archaic Greece (2009), and Competition in the Ancient World (2011). The latter includes a wide-ranging paper entitled Rivalry in history: an introduction