Frank Irvine Lecture in Jurisprudence, Cornell University, 2010
Sir Malcolm Knox Lecture in Philosophy, University of St. Andrews, 2008
Judge Guido Calabresi Lecture, Yale University, 2008
John Dewey Lecture in Philosophy of Law, Harvard University, 2007
Hall Family Foundation Distinguished Visiting Professor, William Jewell College, 2006
J. Michael Miller Visiting Professor, University of St. Thomas, February, 2005
Jack Rudin and John Driscoll Distinguished Visiting Professor, Iona College, October, 2002
Harold Gill Reuschlein Visiting Professor, Villanova University, March, 2002
Honorary Professor of Law, Philosophy, and Religion, Spring Arbor University, 2001-
Royden B. Davis Visiting Scholar, Georgetown University, Spring, 1994