Book excerpt: This book considers the importance of a scientific understanding of prejudice and racism, different approaches to the definition and conceptualization of prejudice, and the relation of prejudice and behavior, and provides a unique historical analysis of social scientific understandings of prejudice. Duckitt integrates an otherwise confusing mass of popular theories and perspectives into a coherent explanatory framework, and develops a systematic multilevel approach to the problem of reducing prejudice in society and individuals.