Melanie Killen (University of Maryland) is Professor of Human Development and Associate Director of the Center for Children, Relationships, and Culture at the University of Maryland. She is co-editor (with Daniel Hart) of Morality in Everyday Life: Developmental Perspectives, co-editor (with Jonas Langer) of Piaget, Evolution, and Development, and editor of Children's Autonomy, Social Competence and Interactions with Adults and Children. Her research area is social and moral development, including social reasoning about group inclusion and exclusion, implicit biases about groups, and cultural