The 20 physicians in the dock range from leaders of German scientific medicine, with excellent international reputations, down to the dregs of the German medical profession. All of them have in common a callous lack of consideration and human regard for, and an unprincipled willingness to abuse their power over the poor, unfortunate, defenseless creatures who had been deprived of their rights by a ruthless and criminal government. All of them violated the Hippocratic commandments which they had solemnly sworn to uphold and abide by, including the fundamental principles never to do harm—“primum non nocere.” Outstanding men of science, distinguished for their scientific ability in Germany and abroad, are the defendants Rostock and Rose. Both exemplify, in their training and practice alike, the highest traditions of German medicine. Rostock headed the Department of Surgery at the University of Berlin and served as dean of its medical school. Rose studied under the famous surgeon, Enderlen, at Heidelberg and then became a distinguished specialist in the fields of public health and tropical diseases. Handloser and Schroeder are outstanding medical administrators. Both of them made their careers in military medicine and reached the peak of their profession. Five more defendants are much younger men who are nevertheless already known as the possessors of considerable scientific ability, or capacity in medical administration. These include the defendants Karl Brandt, Ruff, Beiglboeck, Schaefer, and Becker-Freyseng. A number of the others such as Romberg and Fischer are well trained, and several of them attained high professional position. But among the remainder few were known as outstanding scientific men. Among them at the foot of the list is Blome who has published his autobiography entitled “Embattled Doctor” in which he sets forth that he eventually decided to become a doctor because a medical career would enable him to become “master over life and death.” The part that each of these 20 physicians and their 3 lay accomplices played in the conspiracy and its execution corresponds closely to his professional interests and his place in the hierarchy of the Third Reich as shown in the chart. The motivating force for this conspiracy came from two principal sources. Himmler, as head of the SS, a most terrible machine of oppression with vast resources, could provide numberless victims for the experiments. By doing so, he enhanced the prestige of his organization and was able to give free rein to the Nazi racial theories of which he was a leading protagonist and to develop new techniques for the mass exterminations which were dear to his heart. The German military leaders, as the other main driving force, caught up the opportunity which Himmler presented them with and ruthlessly capitalized on Himmler’s hideous overtures in an endeavor to strengthen their military machine.