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Karl Berngardovich Radek was a Marxist active in the Polish and German social democratic movements before World War I and an international Communist leader in the Soviet Union after the Russian Revolution.
Radek was born in Lemberg, Austria-Hungary (now Lviv in Ukraine), as Karol Sobelsohn, to a Jewish Litvak family.Radek joined the Social Democracy of the Kingdom of Poland and Lithuania (SDKPiL) in 1904 and participated in the 1905 Revolution in Warsaw, where he had responsibility for the party's newspaper Czerwony Sztandar.
After the outbreak of World War I Radek moved to Switzerland where he worked as a liaison between Lenin and the Bremen Left, with which he had close links from his time in Germany, introducing him to Paul Levi at this time.He took part in the Zimmerwald Conference in 1915, siding with the left.
Radek was born in Lemberg, Austria-Hungary (now Lviv in Ukraine), as Karol Sobelsohn, to a Jewish Litvak family.Radek joined the Social Democracy of the Kingdom of Poland and Lithuania (SDKPiL) in 1904 and participated in the 1905 Revolution in Warsaw, where he had responsibility for the party's newspaper Czerwony Sztandar.
After the outbreak of World War I Radek moved to Switzerland where he worked as a liaison between Lenin and the Bremen Left, with which he had close links from his time in Germany, introducing him to Paul Levi at this time.He took part in the Zimmerwald Conference in 1915, siding with the left.