Professor Kagan, who received his PhD from Ohio State University in 1958, has written The Great Dialogue: A History of Greek Political Thought from Homer to Polybius (1965 and 1986); The Outbreak of the Peloponnesian War (1969); The Archidamian War (1974); The Peace of Nicias and the Sicilian Expedition (1981); The Fall of the Athenian Empire (1987); Pericles and the Birth of the Athenian Empire (1990); On the Origins of War and the Preservation of Peace (1995); While America Sleeps (2000) with Frederick W. Kagan; The Western Heritage (2000) with Steven Ozment and Frank M. Turner; The Heritage of World Civilizations (2000) with Albert M. Craig, William A. Graham, Ozment and Turner; The Peloponnesian War (2003).