The classification of people into races is one of the most controversial practices in biological research. However, instead of coming to an end, a renaissance of racialized concepts has emerged in recent decades. Tino Plümecke's detailed study examines for the first time why race has repeatedly become part of cutting-edge research. It analyzes the racializations in various biological disciplines and the developmental lines in the context of genetic approaches. The book brings together expertise from the biological, humanities, and social sciences and contributes to the further development of critical and interventionist science research.