Treatise on the Virtues

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.

The late John A. Oesterle was assistant chairman of the department of philosophy at the University of Notre Dame (1972-1977) and the editor of The New Scholasticism (1967-1977).