An examination of the processes underlying immoral behavior with an emphasis on Social Psychology and adjacent fields like Philosophy, Social Neuroscience, and Behavioral Economics. Largely by means of reading and discussing peer-reviewed publications, we start by reflecting on different conceptualizations of morality and its importance to living in groups. We then explore various recent findings on who behaves immorally, why, and when. As importantly, we address several ways in which humans justify immoral and unethical behavior to themselves and others. Each student develops a research proposal over the course of the semester. Prerequisite: PSYCH*206 and PSYCH*207; one of PSYCH*160, PSYCH*162, or PSYCH*164; and permission of the instructor. Distribution Requirements: None.