The Communist movement in Korea emerged as a political movement in the early 20th century. Although the movement had a minor role in pre-war politics, the division between the communist North Korea and the anti-communist South Korea came to dominate Korean political life in the post-World War II era. North Korea, officially the Democratic People's Republic of Korea, continues to be a "Juche" "socialist" state under the rule of the Workers' Party of Korea. In South Korea, the National Security Law has been used to criminalize advocacy of communism and groups suspected of alignment with North Korea. Due to end of economic aid from Soviet Union after its dissolution in 1991 and impractical ideological application of Stalinist policies in North Korea over years of economic slowdown in the 1980s and receding during the 1990s, North Korea replaced Communism with the Juche ideology in its 1992 and 1998 constitutional revisions for the personality cult of Kim's family dictatorship and (albeit reluctantly) opening of North Korean market economy reform, though it still retains a command economy with complete state control of industry and agriculture. North Korea maintains collectivized farms and state-funded education and healthcare.