This book brings together, in one volume, a review of the research on discrimination based on race, age, sexual orientation, gender, physical appearance, disability, and personality. In addition, it explores the multilevel antecedents and potential bases for a general model of discrimination in the workplace. While social psychological research and theory have provided invaluable insights, an understanding of discrimination in the workplace and solutions will require incorporating factors at the organizational level in addition to factors at the individual and group levels. Although a definitive model is not reached, the aim of this text is to facilitate future research and theory.