My research concerns the social psychology of conflict and injustice. I am interested in antecedents and process of moral exclusion, when people come to see others as outside their scope of justice and therefore as eligible targets of violence, exploitation, and harm. I also examine moral inclusion, when rights and resources are extended to marginalized groups to promote social justice. I study moral exclusion and inclusion in a variety of contexts: post-war societal change, environmental degradation and protection, high school student achievement and disengagement, hating and hate crime, violence, and the post 9/11 recovery trajectory in NYC. I am the 2008-9 president of the Society for the Psychological Study of Social Issues, Division 9 of the American Psychological Association.