Korsch's stance had ramifications which were unpalatable to the official Communist Party structure – not least, casting the Party's own ideological weaknesses as the only material explanation for the failure of the revolution. Published in 1923, "Marxism and Philosophy" was strongly opposed by Party faithful and other left-wing figures, including Karl Kautsky and Grigory Zinoviev. Zinoviev famously said of Korsch and his fellow critic Lukács, "If we get a few more of these Professors spinning out their theories, we shall be lost." Over the subsequent five years, the German Communist Party gradually purged all such dissenting voices. Korsch survived within a current known as the Resolute Lefts, until his expulsion in April 1926. He remained a communist deputy to the Reichstag.