Summa Contra Gentiles

St. Thomas Aquinas (1225-1274) is a Doctor of the church. He was an Italian Dominican friar and Roman Catholic priest who was an influential philosopher, theologian, and jurist in the tradition of scholasticism. Canonized in 1323 by Pope John XXII, Aquinas was the foremost classical proponent of natural theology and the father of Thomism.

Mark D. Jordan is the Andrew W. Mellon Professor of Christian Thought and Professor of Studies of Women, Gender, and Sexuality (Faculty of Arts and Sciences) at Harvard's Divinity School. Jordan won the annual Randy Shilts Award for nonfiction for his 2011 book, Recruiting Young Love: How Christians Talk about Homosexuality.

Anton C. Pegis served as president of the Pontifical Institute from 1946 to 1952 and subsequently became editorial director of the Catholic textbook division of Doubleday and Company in New York. He remained a fellow of the institute, returning to Toronto to teach full time from 1961 until his retirement in 1974.