Karl Kautsky, Emil Ludwig, Leo Trotzki, August Bebel, Ernst Toller, Clara Zetkin, Franz Mehring, Ricarda Huch, Karl Radek, Rosa Luxemburg, Peter Kropotkin
Karl Kautsky, Emil Ludwig, Leo Trotzki, August Bebel, Ernst Toller, Clara Zetkin, Franz Mehring, Ricarda Huch, Karl Radek, Rosa Luxemburg, Peter Kropotkin