The outbreak of World War I in 1914 was seen in Germany as the final test for its Jewry. The Jews had an opportunity to prove that they were good German citizens by acting loyally and patriotically as the rest of the population and would thus, hopefully, make an end to German anti-Semitism. This essay attempts to analyse the attitudes of four prominent German Jews to the war. Hermann Cohen appeared as a super-patriot appealing to the Jews of other countries for solidarity with Germany and trying to show the deep affinity between Germanism and Judaism. Martin Buber first supported the German cause, but gradually grew more critical of it. The war came to signify a dramatic shift in his thinking: away from his earlier mystical thought to his i...