High Quality Content by WIKIPEDIA articles! The Socialist Party (Swedish: Socialistiska partiet), initially known as the Communist Party of Sweden (Sveriges kommunistiska parti), was a political party in Sweden active from 1929 to 1948. The party was founded in 1929 by the major faction of the Communist Party of Sweden, led by Karl Kilbom and Nils Flyg, as the party split into two parties with the same name. This faction was generally known as Kilbommare ("Kilbomians") while the other minor party was known as Sillenare ("Sillenians", after their leader Hugo Sillen).