This article deals with Stefan Zweig’s political engagement towards Russia in the time of the Republik of Weimar. By focusing on Zweig’s articles published in Großmanns left-democratic journal Das Tage-Buch and in the Marxist-socialist magazines Arbeiter-Zeitung and Rote Fahne, we argue that the believed apolitical Zweig actively participated to the cultural and political debate about the Soviet Union. The first part shows how Zweig contributed to the Russian discourse immediately after the World War, by using the Tage-Buch as a platform to express his opinion about the pro-Communist movement Clarté and the political transformations in the Soviet Union. The second part concentrates on Zweig’s attempts to create a common front against the war in the 30s through the pro-Russian journals Rote Fahne and Arbeiter-Zeitung, by exploiting his position as a respected intellectual in order to combine Marxist and Socialist forces.