Richard F. Hamilton is Professor Emeritus at The Ohio State University. He is the author of President McKinley and the Coming of War, 1898; President McKinley and America's 'New Empire'; and The Origins of World War I.
Holger H. Herwig is Canada Research Chair in Military and Strategic Studies at the University of Calgary. He is the author of The First World War: Germany and Austria-Hungary 1914–1918, War Memory and Popular Culture, The Origins of World War I, and The Marne: 1914 (2012).