Hermann Heller (17 July 1891 – 5 November 1933) was a German legal scholar and philosopher of Jewish descent. He was active in the non-Marxist wing of the Social Democratic Party of Germany (SPD) during the Weimar Republic. He attempted to formulate the theoretical foundations of the social-democratic relations to the state, and nationalism. He was politically active in the relatively conservative Hofgeismarer Kreis of the SPD and is believed to have authored the group's statement of principles. Source: Wikipedia (en)