In general, if signs of sectarianism do appear in a Socialist Party, these are only the products of the absence of a broad Labour movement in the country.

Karl Bernhardovic Radek (Russian: Карл Бернга́рдович Ра́дек) (31 October 1885 – 19 May 1939) was a Marxist active in the Polish and German social democratic movements before World War I and an international Communist leader after the Russian Revolution.