Diversity is both a cause for controversial discussions and an opportunity to reflect on social participation. This book offers a basic introduction to important currents in diversity research by presenting central theoretical determinants of the research perspective. An analysis of the diversity strategy and its implementation at the University of California, Berkeley serves as an empirical-practical example in this regard. In particular, this case study illustrates the intersectional research perspective and the multi-level and multi-method research design of reflexive diversity research. In the sense of reflexive constructivism, the practice of research itself is reflected using the example of the case study.