Melvyn P. Leffler is Edward Stettinius Professor of American History at the Department of History, University of Virginia. His previous publications include To Lead the World: American Strategy after the Bush Doctrine (2008, as co-editor), For the Soul of Mankind: The United States, the Soviet Union, and the Cold War (2007, winner of the AHA George Louis Beer Prize) and A Preponderance of Power: National Security, the Truman Administration and the Cold War (1992, winner of the Bancroft Prize, the Robert Ferrell Prize and the Herbert Hoover Book Award). Odd Arne Westad is Professor of International History at the London School of Economics and Political Science. His previous publications include The Global Cold War: Third World Interventions and the Making of Our Times (2005, winner of the Bancroft Prize, the APSA New Political Science Prize and the Akira Ireye Award), Decisive Encounters: The Chinese Civil War, 1946–1950 (2003) and Brothers in Arms: The Rise and Fall of the Sino-Soviet Alliance, 1945–1963 (1999, as editor).