Fr. Dennis J. Billy, CSsR, is an American Redemptorist of the Baltimore Province with advanced degrees from Harvard University, The Pontifical University of St. Thomas (Angelicum), and The Graduate Theological Foundation. He taught for more than twenty years at the Alphonsian Academy of Rome's Pontifical Lateran University and is now scholar-in-residence, professor, and holder of the John Cardinal Krol Chair of Moral Theology at St. Charles Borromeo Seminary, Overbrook, in Wynnewood, Pennsylvania. He has authored numerous books and articles on various religious topics.