Professors Heidi M. Hurd and Michael S. Moore, co-directors of the Illinois Program in Law and Philosophy, organized and chaired an international roundtable on “The Evil Within: Why We Need Moral Philosophy,” which was hosted at the University Club of Chicago on September 29-21, 2019. Attended by practicing lawyers, legal scholars, and philosophers from across the U.S. and Canada, the gathering took the book by the same title, authored by Diane Jeske (of the University of Iowa Philosophy Department), as a springboard to discussions about the psychology of evil and the ways in which moral philosophy can assist us in identifying and overcoming the kinds of cognitive biases and motivational impediments that often lead us into moral peril. Employing gripping case studies of slaveholders, Nazi party officials and concentration camp commandants, and serial killers, Professor Jeske’s book invited participants to recognize the parallels between the rationalizations offered by historical perpetrators of great evils and the shortcomings in their own moral thinking with regard to practices that today appear to merit careful moral scrutiny—industrial meat production, climate-altering greenhouse gas emissions, the imprisonment of unprecedented numbers of citizens, the exclusion of refugees by wealthy nations, and so forth.