Robert D. Schulzinger is Professor of History and Director of the International Affairs Program at the University of Colorado at Boulder. A former President of the Society for Historians of American Foreign Relations, he is the editor-in-chief of the society's journal, Diplomatic History. Among his many books are A Time For War: The United Stated And Vietnam, (1997) and U.S. Diplomacy since 1900, 5th Edition (2002).