The analysis confirms that the organisational split in the international socialism, which occurred in the years between 1919 and 1923, was caused by three conflicting and irreconcilable ideologies and factions within the Labour movement: the Right insisted on the reform of capitalism by means of parliamentary struggle; the Left believed that the existing social order could only be changed by revolution and that bourgeois democracy had to be supplanted by the dictatorship of the proletariat; the Centre distinguished between »social« democracy, which would only be possible in a classless society, and »political« democracy, which always implied some form of the class rule - dictatorship, whether it be bourgeois or proletarian.