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Günther Jahn (9 January 1930 – 29 October 2015) was an East German economist, politician and functionary of the Free German Youth (FDJ) and the Socialist Unity Party (SED). Originally a socialist economist working on Walter Ulbricht's New Economic System, Jahn eventually became First Secretary of the FDJ and later First Secretary of the Bezirk Potsdam SED. Though not known for straying from the party line, he was the first high-ranking SED official to call on Erich Honecker to resign during the Peaceful Revolution.
Reference context: Wikipedia.