This article is an overview of the concept of diversity. Diversity is a term used by scholars to refer to the composition of social units and is a concept used by both employers and researchers to describe a wide range of physical, cultural, psychological, and behavioral differences in organizations. Different diversity types recognized by employers (e.g., national origin and culture, gender, race and ethnicity, age, disability, and social class) are summarized and approaches to managing diversity (i.e., the prejudice reduction approach and the preventing discrimination approach) based on the individual-level model of intergroup conflict and leadership are examined. Furthermore, globalization trends and its implications on diversity management in organizations are discussed.