The
Internationaler Sozialistischer Kampfbund (ISK) was a political organization founded by
Göttingen philosopher
Leonard Nelson and educator
Minna Specht. Nelson and Specht had previously founded the
International Socialist Youth League (YSIL) in 1917, which was supported by
Albert Einstein. Nelson, a
neo-Kantian hochschule teacher, had long wanted to teach at a university and also work politically. He advocated a brand of
socialism that was ethically motivated, anti-clerical and anti-
Marxist, but also undemocratic and included strict
vegetarianism and a defense of
animal rights. Nelson decided to establish the ISK after members of the ISYL were expelled from the
Communist Party in 1922 and the
Social Democratic Party in 1925. The ISK took over the ISYL's publishing label,
Öffentliches Leben, which published the ISK newsletter beginning January 1, 1926. Beginning January 1929, an edition in
Esperanto was added, and in April, a small circulation quarterly in English was added as well. It was usually eight pages and editions ran an average of 5,000 to 6,000 copies. Nelson moved his main published works there as well, his philosophical and political series
Öffentliches Leben and his 1904 treatises, "
Abhandlungen der Fries’schen Schule, Neue Folge", re-reasoned with
mathematician Gerhard Hessenberg and
physiologist Karl Kaiser, and which, after Nelson's death, was continued by
Nobel Prize winner
Otto Meyerhof,
sociologist Franz Oppenheimer and Minna Specht until 1937. With the growing electoral success of the Nazis at the end of the Weimar Republic, the ISK founded the newspaper,
Der Funke to confront the situation. Of particular note was the "
Urgent Call for Unity" (
Dringender Appell für die Einheit) regarding the
July 1932 federal election. It appeared in the newspaper and on placards all over
Berlin. Calling for unity and support of the SPD and the
KPD in order to thwart further gains by the Nazis, it was signed by 33 leading German intellectuals, including scientists Albert Einstein, Franz Oppenheimer,
Emil Gumbel,
Arthur Kronfeld, the artist
Käthe Kollwitz, writers
Kurt Hiller,
Erich Kästner,
Heinrich Mann,
Ernst Toller and
Arnold Zweig and many others. The ISK continued to work in the
resistance after the 1933 Nazi
ban. The ISK had destroyed all written party records and until 1938, remained undetected, while the larger parties, the KPD and SPD, were being battered by massive arrests. The ISK was therefore able to continue its resistance work, helping political refugees leave the country, conducting
sabotage and distributing leaflets. In 1938, however, a wave of arrests hit the ISK. A main focus of the work was the attempt to build a clandestine
trade union, the
Unabhängige Sozialistische Gewerkschaft ("Independent Socialist Union"), which also supported the
Internationale Transport Workers' Federation. The ISK's best known act of resistance was the sabotage of the opening of the
Reichsautobahn on May 19, 1935. The night before Hitler's trip to inaugurate the new highway, ISK activists wrote anti-Hitler slogans, such as "Hitler = War" and "Down with Hitler", on all the bridges along the route between
Frankfurt am Main and
Darmstadt, where he was to travel. The
Nazi propaganda film produced of the event had to be edited numerous times. In exile, the ISK also published the
Reinhart Briefe ("Reinhart Letters") and
Sozialistische Warte, which were then smuggled into Germany. Because of their factual and unpolemical reporting, these were valued by various members of the German Resistance. The ISK was linked with the
Socialist Vanguard Group in England and the
Internationale Militante Socialiste in France. ==ISK members after 1945==