Karl Bonhoeffer's life story paints an exciting and fact-rich portrait of an exceptional academic from the Wilhelmine era to the mid-20th century, beyond its medical and scientific significance. Author Klaus-Jürgen Neumärker expertly and impressively presents the development of German psychiatry, significantly shaped by Bonhoeffer, including the controversially discussed position of Bonhoeffer in the Third Reich. Bonhoeffer not only confronted the misuse of science by the Nazis, but he also lost two sons and sons-in-law who were executed as resistance fighters. A major biography, a standard work on Karl Bonhoeffer.