Idealism and relativism were designed to assess different ethical ideological views. Their relation with attitudes toward a variety of outgroups has not been previously studied. Understanding how concerns over ethical principles and consequences are related to prejudiced attitudes could provide some insight into these constructs and into the nature of prejudice. In two studies totaling 311 participants, participants completed measures on ethical ideologies, right-wing authoritarianism, and attitudes toward various outgroups. The differential predictive validities of ethical ideologies, in comparison to right-wing (...) authoritarianism, on prejudicial attitudes toward dangerous, derogated, and dissident outgroup members were examined. We found that both idealism and relativism contributed to predicting attitudes regarding outgroup members, over and above right-wing authoritarianism. As such, people’s personal moral standards and code of conduct for dealing with interpersonal problems and transgressions can partly explain their negative attitudes toward outgroup members. More research is required to determine the unique influence of ethical ideologies over other constructs previously shown to predict prejudice. (shrink)