As a starting point, we examine six dimensions of diversity (race, gender, age, disability, sexual orientation, and national origin) to determine how these literatures have evolved. The purpose of this review is to provide a basis on which to focus on similarities and differences in these separate literatures, in order to determine the extent to which an integrative framework of diversity is meaningful and appropriate. To move toward identifying areas of similarity as a basis for integration, for each diversity dimension included in this article we first briefly review theoretical paradigms and the extent to which associated predictions for the diversity dimensions are positive, negative, or neutral. Since theories guide our research streams, we deem it important to evaluate the extent to which present-day theories adequately represent the potential array of outcomes from negative to positive that may exist for individuals, groups, and organizations. We also review literature on antecedents and outcomes studied within each diversity dimension. Subsequently, we examine themes by reviewing current theoretical paradigms and then limitations across different dimensions of diversity, with the goal of identifying points of integration and needed development for moving the literature forward. Finally, we present a broad model of diversity that integrates key variables and suggestions for the diversity literature going forward.