Fritz Haber (the Nobel Prize-winning Haber process for ammonia synthesis, and also the Fritz Haber of World War I gases) receives orders from the Nazi government to fire all his Jewish collaborators as director of the Kaiser Wilhelm Institute for Chemistry. Haber, in an act of great courage, refuses. In his resignation letter, he says: “For more than forty years, I have chosen my collaborators based on their intelligence and character, not on their grandmothers, and I am not willing to change this method, which has always given me excellent results.”
