Kent Greenawalt is University Professor at Columbia University, teaching at the Law School. A graduate of Swarthmore College, Oxford University, and Columbia Law School, he clerked for Justice Harlan and worked a year in the State Department before teaching at Columbia. He was later Deputy Solicitor General for a year. He has written a number of books and articles on freedom of speech and other constitutional issues, as well as questions about “public reason.” He has a forthcoming book from Oxford University Press on constitutional interpretation.