Historiador americano especialista em relações internacionais dos EUA. Ele atualmente ocupa a cadeira Ralph D. Mershon de Professor Emérito na Universidade de Ohio.
É autor de Colonialism and Cold War: The United States and the Struggle for Indonesian Independence, 1945-49 (1981), The Cold War on the Periphery: the United States, India, and Pakistan (1994), The Limits of Empire: The United States and Southeast Asia since World War II (1999), The Cold War: A Very Short Introduction (2003), e Dean Acheson and the Creation of an American World Order (2009).