Richard R. John is a Professor of History and Communications at Columbia Journalism School, Columbia University. He is a historian who specializes in the history of business, technology, communications, and American political development. He teaches and advises graduate students in Columbia's Ph.D. program in communications, and is member of the core faculty of the Columbia history department, where he teaches courses on the history of capitalism and the history of communications.Jonathan Silberstein-Loeb was Senior Lecturer in History at Keble College, Oxford. He is now a barrister of the Inner Temple.