Eugene Cullen Kennedy (August 28, 1928 – June 3, 2015) was a psychologist, writer, columnist, and professor emeritus of Loyola University Chicago. Kennedy was a laicized Catholic priest and a long-time observer of the Catholic Church, but his work spans many genres. He published over 50 books, including two biographies, three novels, and a play, as well as books on psychology, the Roman Catholic Church, and the relationship between psychology and religion. In the early 1970s, inspired by Vatican II, he emerged as a voice for reform and modernization of the Roman Catholic Church.