The SF was founded on 15 February 1959 by Aksel Larsen, a former leader of the Communist Party of Denmark (DKP). Larsen was removed from the ranks of the DKP for his criticism over the Soviet intervention in the Hungarian Revolution of 1956. Larsen and the new SF sought to form a third way between Denmark's United States-oriented social democracy and Soviet Union–oriented communism, which sought to combine democracy with socialism. He was joined by a large share of the members of the DKP. They all supported the idea of independence from the Soviet Union.