With its famed small, red booklet, it was the key forum of expression for leftist, socialist intellectuals during the Weimar Republic. More than 2600 authors wrote for the paper between 1905 and 1933. In addition to Jacobsohn, Tucholsky, and Ossietzky, the contributors included prominent writers and journalists like Erich Kästner, Alfred Polgar, Arnold Zweig, Manfred George, Lion Feuchtwanger, and Else Lasker-Schüler. Other regular contributors included Julius Bab, Erich Dombrowski, Axel Eggebrecht, Herbert Eulenberg, Hellmut von Gerlach, Moritz Heimann, Kurt Hiller, Erich Mühsam, Rudolf Arnheim, Gabriele Tergit, Richard Lewinsohn, Fritz Sternberg and Heinrich Ströbel.