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