In 1925, the three leading chemical firms in Germany - BASF, Bayer, and Hoechst - merged, together with some smaller firms, to become IG Farben. IG Farben became, like no other firm, synonymous with the participation of German industry in the most heinous crimes of the Nazi regime. This book deals in depth with one of IG Farben's leading factories, Hoechst, during the Third Reich. On the basis of long and meticulous archival research, including previously inaccessible company records, the author tries to describe and analyze the relationship between management and employees and the Nazi party and its organizations. The author shows the exclusion and persecution of employees, particularly Jewish employees. He traces the extent of Hoechst's involvement in the exploitation of forced labor, and its active participation in human experiments in several concentration camps. Throughout, he tries to shed light on the motivations of those responsible for this conduct.