Professor Ryan graduated from the University of Illinois at Urbana-Champaign with a B.S. in computer science in 1989, and from the University of Iowa with a Ph.D. in philosophy in 1999.

Books:

• Ryan, Todd. Pierre Bayle's Cartesian Metaphysics. New York: Routledge, 2009.

• Ryan, Todd. "Hume on Philosophical Relations." Hume Studies (forthcoming).
  
• Ryan, Todd. “Bayle’s Critique of Lockean Superaddition.” Canadian Journal of Philosophy Vol. 36(4), 2006.
• Ryan, Todd. “A New Account of Berkeley’s Likeness Principle.” The British Journal for the History of Philosophy Vol. 14(4), 2006.
• Ryan, Todd. “Bayle’s Defense of Mind-Body Dualism.” Aufklärung Vol. 16, 2004.
• Ryan, Todd. “Hume’s Argument for the Temporal Priority of Causes.” Hume Studies Vol. 29(1), 2003.
• Ryan, Todd. “Pierre Bayle.” In A Companion to Early Modern Philosophy. Edited by Steven Nadler. Oxford: Blackwell, 2002.

Recent Presentations:

• Ryan, Todd. “Scepticisme et fideisme dans la pensée de Pierre Bayle”, Les “Éclaircissements” de Pierre Bayle, Paris, France, November 8-10, 2006.
• Ryan, Todd. “Malebranche and the Argument From Continuous Creation.” 10th California Conference in Early Modern Philosophy, California State University Long Beach, October 20-21, 2006.
• Ryan, Todd. “The Role of Malebranche in Hume’s Account of Abstract Ideas.” 33rd Annual Hume Society Conference, Koblenz, Germany, August 7-10, 2006.
• Ryan, Todd. “Bayle and the Rights of Errant Conscience.” American Renaissance Society, Cambridge, UK, April 7-9, 2005.

• Colin and Ailsa Turbayne International Berkeley Essay Prize, 2001
• NEH Summer Seminar, Descartes and His Contemporaries, Virginia Tech, 2000