William E. May, American theologian and academic (b. 1928)
William E. May (May 27, 1928 – December 13, 2014) was an American theologian who was the Michael J. McGivney Emeritus Professor of Moral Theology at the Pontifical John Paul II Institute for Studies on Marriage and Family at The Catholic University of America in Washington, DC where he taught from 1991 to 2008.
He previously taught moral theology at The Catholic University of America from 1971 to 1991. Dr. May has also lectured and taught at various universities around the world and taught courses for the Catholic Distance University. Along with John Finnis, Robert P. George and Germain Grisez, and others, he was one of the major proponents of the new natural law theory, which draws on the ethics of Thomas Aquinas.