Kim Jong Il was the Supreme Leader of North Korea from 1994 to 2011.

Juche, officially the Juche idea, is the state ideology of North Korea and the official ideology of the Workers' Party of Korea. North Korean sources attribute its conceptualization to Kim Il Sung, the country's founder and first leader. Juche was originally regarded as a variant of Marxism–Leninism until Kim Jong Il, Kim Il Sung's son and successor, declared it a distinct ideology in the 1970s. Kim Jong Il further developed Juche in the 1980s and 1990s by making ideological breaks from Marxism–Leninism and increasing the importance of his father's ideas.