In 1970, he began teaching at Saint Ann's School, where he teaches world history. He has been a regular contributor to the New York Times Book Review, and is the author of books and articles on intellectual history (history of ideas). One book The End of Kings (1983, 2000) recaptures the historical definition of "republic" as a state not ruled by one person. Another, The First Moderns (1997) redefines "Modernism" as the abandonment of continuity in the arts and sciences that began in the West in 1872-1913.
He has also written on teaching history, and served on the Test Development Committee for the first Advanced Placement World History Exams. A member of the American Historical Association, he has also served as the president of the affiliated Organization of History Teachers, and of the East-Central American Society for Eighteenth-Century Studies. He lives in Brooklyn with his wife, Barbara, who is an administrator at Saint Ann's. His sons, Josh and Chris, were born in 1971 and 1974.
"The Problem of Continuity and the Origins of Modernism: 1870-1913," History of European Ideas, Pergamon Press, 1988.
“Monologues of the Mad: Paris Cabaret and Modernist Narrative from Twain to Eliot” (ISSEI, Aalborg, Denmark, 8/25/92) in Studies in American Fiction, 20:2(Dec, 1992)
“Modernism at 100”, Prometheus I:1(1998-99)
Review of Banfield, The Phantom Table: Woolf, Fry, Russell and the Epistemology of Modernism, in Russell: Journal of Bertrand Russell Studies, NS v21:1 (Summer 2001), p88
Christian Apologetics in France, 1730-1790: The Roots of Romantic Religion, Edwin Mellen Press, 1987.
“The Rosières Movement, 1766-1789: A Clerical Precursor of the Revolutionary Cults” in French Historical Studies 9:1(1975)
“Complots, Côteries, Conspirations: L’origine de la ‘thèse Barruel’ dans le roman apologétique” (7/6/89) in L’Image de la Révolution française: Communications présentées lors du Congrès Mondial..., vol III, Paris, 1989
Review of Taves, Fits, Trances and Visions in New York Times Book Review, (26 December, 1999)
“Enlightenment: A Rhetoric of Suspicion,” St. Ann’s Review 5:1(Winter/Spring, 2004), p22-33
The End of Kings: A History of Republics and Republicans, The Free Press, 1983, (2nd edition, University of Chicago Press, 2000)
“How to Use the Theme of Technology in a World History Survey Course,” American Historical Association, San Francisco, 5 January, 2002, revised, in World History Connected.
“How Much Is That In Dollars? Teaching World Economic History Starting With What Students Most Want To Know” Organization of History Teachers/American Historical Association, Conference, DC, January, 2004
“His Own Wikipedia Entry: Grooming and Maintaining One's Reputation As an Independent Scholar on the Internet's Margin of Entropy,” Verlag der bibliographischen Geister, 2006.