Ph.D. Stanford University, 1986
M.A.,University of Utah, 1982
John teaches and writes on media history and theory. He taught at the University of Iowa between 1986-2016. He is the author of Speaking into the Air: A History of the Idea of Communication (1999), Courting the Abyss: Free Speech and the Liberal Tradition (2005), The Marvelous Clouds: Toward a Philosophy of Elemental Media (2015), and most recently, Promiscuous Knowledge: Information, Image, and Other Truth Games in History (2020), with the late Kenneth Cmiel (all published by the University of Chicago Press). He is working on a media history of weather, and has advised or co-advised over three dozen doctoral dissertations.