Donald Kagan is Sterling Professor of Classics and History at Yale University. A former dean of Yale College, he received his Ph.D. in 1958 from The Ohio State University. His publications include On the Origins of War and the Preservation of Peace, The Peloponnesian War, and Thucydides: The Reinvention of History. In 2002 he was the recipient of the National Humanities Medal and in 2005 was named the National Endowment for the Humanities Jefferson Lecturer.