Daniel R HeadrickDaniel R. Headrick is professor of social science and history, emeritus, at Roosevelt University. He is the author of numerous books, including The Tools of Empire: Technology and European Imperialism in the Nineteenth Century; The Tentacles of Progrss: Technology Transfer in the Age of Imperialism; The Invisible Weapon: Telecommunications and International Politics, 1851-1945; When Information Came of Age: Technologies of Knowledge in the Age of Reason and Revolution, 1700-1850; Technology: A World History; and Power over Peoples: Technology, Environments, and Western Imperialism, 1400 to the Present. He lives in New Haven, Connecticut. Read More Read Less