"Pacem in terris" was the first encyclical that a pope addressed to "all men of good will", rather than only to Catholics, quoting the praise to God as said by the heavenly army above the manger of Bethlehem (Latin Vulgate: "in terra pax in hominibus bonae voluntatis", Luke ; English translation: ). Learned Hand Professor of Law at Harvard Law School, Mary Ann Glendon, interprets this to mean, "He was insisting that the responsibility for setting conditions for peace does not just belong to the great and powerful of the world—it belongs to each and every one of us." In theological terms, it marked a major shift in papal teaching from reliance on classical scholastic categories of natural law to a more inductive approach based on the signs of the times.