Mark F. Johnson (Ph.D., Medieval Studies, University of Toronto , MSL, Pontifical Institute of Mediaeval Studies ), [Historical], specializes in the life and thought of St. Thomas Aquinas, especially his moral thought.
He has authored over twenty-five articles (e.g., Theological Studies, Medieval Philosophy and Theology, Recherches de théologie ancienne et médiévale, The Thomist). Recent articles include: "An Accomplishment of the Moral Part of Aquinas's Summa theologiae," in James R. Ginther and Carl N. Still eds., Essays in Medieval Theology and Philosophy in Memory of Walter H. Principe: Fortresses and Launching Pads (Aldershot: Ashgate Publishers, 2004), pp. 85-104; "Aquinas's Summa theologiae as Pedagogy," in Medieval Education, eds. R.B. Begly and J.W. Koterski, SJ (New York: Fordham University Press, 2005), pp. 133-142, and “La «Summa de poenitentia» attribuita a Paolo Ungaro,” Divus Thomas 109/2 (2006): 136-145. The year 2007 saw the publication of his edited volume, St. Thomas Aquinas and the Mendicant Controversies: Three Translations, trans. John Proctor, OP (Leesburg, VA: Alethes Press, 2007), for which he authored the Introduction, and “Augustine and Aquinas on Original Sin: Doctrine, Authority, and Pedagogy,” in Aquinas the Augustinian, eds. Michael Dauphinais, Barry David, Matthew Levering (Washington, DC: Catholic University of America Press, 2007), pp 145-158.
At present he is writing a monograph, Nature, Grace, Sin, and Glory: The Moral Universe of Thomas Aquinas, which will examine Thomas's moral teaching in its full historical and theological context. He is also editing, from the medieval manuscripts, the early Dominican, Paul of Hungary's Summa de penitentia, as well as other medieval pastoral texts.