Donald Kagan is "Hillhouse Professor of History and Classics at Yale University, where he has taught since 1969. He received the A.B. degree in history from Brooklyn College, the M.A. in classics from Brown University, and the Ph.D. in history from Ohio State University.
"During 1958—1959 he studied at the American School of Classical Studies as a Fulbright Scholar. He has received four awards for undergraduate teaching at Cornell and Yale.
"He is the author of a history of Greek political thought The Great Dialogue (1965); a four-volume history of the Peloponnesian war, The Origins 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); and a biography of Pericles, Pericles of Athens and the Birth of Democracy (1991); and On the Origins of War (1995). With Brian Tierney and L. Pearce Williams, he is the editor of Great Issues in Western Civilization, a collection of readings."
- Winner of the 2002 National Endowment for the Humanities: National Humanities Medal 
Donald Kagan and his son, Frederick Kagan authored the 2000 book While America Sleeps: Self-Delusion, Military Weakness, and the Threat to Peace Today, "which argues in favor of missile Defense and warns of future threats."