Harry J. Gensler, S.J., is Professor of Philosophy at Loyola University Chicago. His fourteen earlier books include Gödel’s Theorem Simplified (1984), Formal Ethics (1996), Catholic Philosophy Anthology (2005), Historical Dictionary of Logic (2006), Historical Dictionary of Ethics (2008), Ethics: A Contemporary Introduction (1998 & 2011), Ethics and the Golden Rule (2013), and Ethics and Religion (2016).