Audio recording of a lecture delivered on October 23, 1981, by Leon Kass as part of the Formal Lecture Series.

Dr. Kass is Addie Clark Harding Professor Emeritus in the Committee on Social Thought and in the College at The University of Chicago, the Hertog Fellow at the American Enterprise Institute, and the Dean of the Faculty at Shalem College in Jerusalem. He was a tutor at St. John's College from 1972 to 1974.