From 1933-1945, walled in by false certainties based on definitive "results", anthropologists and German psychiatrists directly organized the segregation, forced sterilization, and extermination of hundreds of thousands of "different" people: Jews and Tsiganes, as well as the mentally ill, retarded, handicapped, and those deemed to be asocial individuals. This thorough investigation by geneticist Benno Muller-Hill provokes serious thought on the moral responsibilities of intellectuals.