Fritz Haber (9th December 1868 – 29th January 1934) was a Jewish chemist considered the “father of chemical warfare” for his years of work developing and weaponizing chlorine and other poisonous gases during World War I. Haber was born in Breslau, Prussia (now Wrocław, Poland), into a well-off Jewish family the son of Siegfried and Paula Haber, first cousins who married. His family supported the Jewish community and observed many Jewish traditions. Haber’s actions during the Second Battle of Ypres are particularly monstrous. Though the battlefield use of poison gas was manifestly in breach of international treaty obligations on the 22nd April 1915 Haber oversaw the opening of 6,000 cylinders of poisonous gas at Ypres, awaking the world to a new terror. In less than 10 minutes on that Belgian Spring day, 1,000 French soldiers had died slowly from asphyxiation while a further 4,000 lay in agony as the Chlorine gas destroyed the respiratory organs of its victims. Haber kept going and over the course of a month, he released 500 tons more of the fatal gas. Clara Immerwahr, Haber’s wife and a gifted chemist in her own right took her own life at the shame of her husband’s perversion of science. Directly after WWII, in 1946 Haber’s son Hermann also committed suicide because of his father’s work. Indeed, in 1916 now director of the Kaiser Wilhelm Institute for Physical Chemistry and Electrochemistry (KWIPC, today the Fritz Haber Institute of the MPG) in Berlin Haber had continued his work on toxic gases and was responsible for the development of mustard gas and Zyclone B. Disgusted with his activity, in 1933 National Socialists ousted Haber from Germany but his work had already achieved its morally reprehensible goal introducing Europe to fatal clouds of mass destruction a prelude to his brethren Oppenheimer during ww2. A scientist then offered him a laboratory at Cambridge University ‘coincidentally’ coinciding with the occupation of the Cambridge spies. He duly accepted and came to England but did not stay long. The following year he died in Switzerland en route to Palestine.