My research interests are in the areas of intergroup relations, prejudice-reduction and political behavior. Much of my work investigates the strategies individuals use to deal with situations where an in-group (e.g., their nation) has violated their personal values, via a transgression (e.g. actions during war). Within this framework, I investigate when people will allow unjust in-group behavior to continue. I am also interested in the effects of identity processes and ideology on the collective action tendencies of disadvantaged groups. Additionally, I am interested in the role of psychological needs in explaining differences between politically liberal and conservative individuals' political behavior (e.g., decision-making). My approach is interdisciplinary, such that I use social psychology, political psychology, and government/public policy studies to inform the investigation of individual behavior, as well as the consequences of public policy. Broadly, I seek to use my research to inform domestic and foreign policy.