In my last post, I introduced the person of Thomas Aquinas, a thirteenth century theologian and mendicant friar in the newly formed Order of Preachers. Today I want to outline my own reasons for agreeing with the eminent moral theorist, Philippa Foot, who writes: “It is my opinion that the Summa Theologica is one of the best sources we have for moral philosophy, and moreover that St. Thomas’s ethical writings are as useful to the atheist as to the Catholic or other Christian believer.”[1] Why would Foot, an avowed atheist who is said not to have had a religious bone in her body, counsel us to turn to a medieval theologian for answers about the good life? Why doesn’t she just stick with the more familiar and accepted Aristotelian source material?