David Gallagher, Ph.D., is an independent scholar and an academic adviser of the Principium Institute. He taught for eleven years at the Catholic University of America in Washington, D.C., where he was an Associate Professor of Philosophy. He earned his B.A. in Philosophy from the University of Navarra, and both his M.A. and Ph.D. in Philosophy from the Catholic University of America. His publications include his ed., Thomas Aquinas and His Legacy (The Catholic University of America Press, 1994).