JOHN LEWIS GADDIS is an internationally renowned historian of the cold war. He has written extensively on the subject, including "We Now Know: Rethinking Cold War History" and "The United States and the Origins of the World War, 1941-1947". Gaddis is on the advisory board of the Cold War International History Project. A senior fellow of the Hoover Institution from 2000 to 2002, he served as a consultant on the CNN television documentary "Cold War." Gaddis resides in Connecticut.