He was released from prison on 20 December 1938 , based on an earlier amnesty . He lived with his wife and children and worked in Warsaw cooperatives until the outbreak of war . The " Sanation " prison may have saved his life : while he was incarcerated , the KPP was disbanded by the Comintern and most of its leaders murdered in Stalin 's purges
Stalin 's purges
Great Purge
Bolesław Bierut