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Korean philosophy goes back more than two thousand years. Traditional Korean philosophy focused on a totality of world view. The emotional content of Shamanism, and the unpredictable, and some aspects of Neo-Confucianism were integrated into it. Traditional Korean thought has been influenced by a number of religious and philosophical thought-systems over the years. As the main influences on life in Korea, often Korean Shamanism, Buddhism, and Confucianism movements have shaped Korean life and thought.
- See main article: Korean Shamanism
Traditional rites and shamanistic practices have developed in Korea for millennia. Throughout Korean history, native shamanism deeply influenced and was influenced by Buddhism and Taoism. In contemporary Korean, a shaman is known as a mudang.
Even though belief in Korean shamanism is not as widespread as it once was, the practices are kept alive. The mudang seeks to solve human problems through a connection to the spirits. This can be seen clearly in the various types of gut that are still widely performed.
Korean Buddhist thinkers refined ideas originally introduced from China into a distinct form. The Three Kingdoms of Korea introduced Buddhism to Japan, from where it was popularized in the West. Korean Buddhism consists mostly of the Seon lineage, which is derivative of the Chen (Zen) Buddhism of China and precursor to Zen Buddhism known in the West through Japan.
- See main article: Korean Confucianism
One of the most substantial influences in Korean intellectual history was the introduction of Confucian thought as part of the cultural exchange from China. Today the legacy of Confucianism remains a fundamental part of Korean society, shaping the moral system, the way of life, social relations between old and young, and high culture, and even survived the modernization of the legal system.
Schools of thought in the Joseon period 
This dynasty arose out of the military dictatorships and chaos of the preceding era. Transition in this era was from Buddhism to a soldierly approach to Neo-Confucianism. Much work was done, especially on commentaries, and the Chu Hsi school represented indeed the golden age of Korean religious philosophy. Metaphysical research at this time investigated the theological relations between principle (i) and material/vital force (ki), and between as well the four beginnings (sadan), and the seven feelings (ch'ilchong); with the division of the Joseon Confucianists into two leading schools: one on "force" and one on "principles". The philosopher Hwadam ( Suh Kyungduk, 1489–1546 ) moved to integrate i and ki and spoke of Great Harmony (taehwa).
In the Four–Seven Debate with Ki Daesung, Toegye ( Yi Hwang, 1501 – 70 ), while being still dualistic, broke away from Chu Hsi by espousing the reciprocal emanation (hobal) of i and ki: with the Four, ki follows i when i becomes emanant; with the Seven, when ki becomes emanant, i ‘rides’ ki. Though he was critical of Toegye's idea that ki follows i as being dualistic, Yulgok (Yi I, 1536 – 84 ) nevertheless embraced his notion that i ‘rides’ ki: only ki is emanant and i moves its emanation; i and ki are ‘neither two things nor one thing’, as evidenced by ‘wondrous fusion’ (myohap). For Yulgok, original nature (i) and physical nature (ki) coalesce into one human nature. Toegye and Yulgok, whose thoughts culminated in an irenic fusionism, constituted the crowning phase of East Asian neo-Confucianism by exhibiting dialectical dexterity in articulating the concepts of i and ki, left unclarified by the Chinese.
Toegye also developed the neo-Confucianist concept of single-mindedness (kyung), which was a manifestation of his unequivocal humanism, as shown by his total rejection of the Mandate of Heaven (chunmyung), which still had a hold on the Chinese, including Chu Hsi. Toegye's kyung synthesized the primeval Korean sense of supreme-efforts-come-earnest-devotion (chisung) with the Confucianist notion of holding fast to mind (jik-yung); he advocated self-efforts for creating a meaningful life. In particular, his concept of single-mindedness had a lasting influence on the Japanese neo-Confucianists of the Tokugawa period.
Every major Korean neo-Confucianist shared Toegye's preoccupation with single-mindedness, which signalled new stress on praxis in the development of Korean neo-Confucianism: the fusion of the metaphysical and the physical is better brought about through action than speculation, important as theory might be. That was the point of Yulgok's integration of sincerity (sung) with single-mindedness. In this respect Korean neo-Confucianism made a break with the Cheng-Chu school of Chinese neo-Confucianism, which was overly speculative.
Western philosophy in Korea from 1890-1945 
Those who were sent to be educated in Japan, returned with limited knowledge of Western philosophy as a whole, although the German educational influence in Japan led to the beginning of interest in German idealists in Korea through indirect knowledge, with the exception of Marx, Hegel, and the dialecticians.
The strong influence of low church Christianity, through missionary schools, led to practical American YMCA-style philosophy entering into Korea from the 1890s onwards. The discussion of Korean Christianity and Korean Christian philosophy is complicated with many divisions, and discussed in articles elsewhere.
Philosophy in Korea was divided, by Western school, according to a kind of pragmatic mix of varied progressive libertarian beliefs in the south with highly variable changes from rigid authoritianism to softer and easier more pragmatic approaches from the 1990s onwards.
North Korean post-1945 philosophy 
In the republican period, post-1945, Marxism-Leninism in the north was built on the Confucian yangban scholar-warriors of earlier times, if perhaps taken to absolutist extremes.
The main influence in North Korea has been since 1996, the notion of "The Red Banner Spirit". This system of belief encourages the North Korean people to build a "kangsong taeguk", a fortress state, based on self-reliance and absolute loyalty to the leader (suryong). This philosophy was created by the "three generals of Mt. Paektu," referring to former North Korean leader Kim Jong-il, his father Kim Il-sung and his natural mother Kim Jong-suk. Again little is known of philosophical publications on this subject; but it appears to have replaced Marxism with a home-grown nationalistic ideology.
Buddhist philosophers 
- Sungnang (circa 6th century)
- Wonch'uk (613–696)
- Wonhyo (617–686)
- Uisang (625–702)
- Uicheon (1055–1101)
- Jinul (1158–1210)
Korean Neo-Confucian philosophers 
- Jeong Do-jeon (1342–1398)
- Seo Gyeong-deok (1489–1546)
- Yi Eon-jeok (1491–1553)
- Jo Sik (1501–1572)
- Yi Hwang (1501–1570)
- Yi I (1536–1584)
- Jeong Je-du (1649–1736)
- Jeong Yak-yong (1762–1836)
- Kim Jeong-hui (1786–1856)
Major philosophical figures of the Joseon period 
- Yeoheon Jang Hyeon-gwang (1554–1637)
- Hagok Jeong Je-du (1649–1736)
- Udam Jeong Si-han (1625–1707)
- Sambong Jeong Do-jeon (1337–1398)
- Dasan Jeong Yag-yong (1762–1836)
- Namdang Han Won-jin (1682–1750)
- Damheon Hong Tae-yong (1731–1783)
- Nosa Gi Jeong-jin (1798–1876)
- Gobong Gi Dae-seung (1527–1572)
- Haseo Kim In-hu (1511–1560)
- Maewoldang Kim Si-seup (1435–1493)
- Yangchon Gwon Geun (1352–1409)
- Yeonam Bak Ji-won (1737–1805)
- Seogye Bak Se-dang (1629–1703)
- Hwadam Seo Gyeong-deok (1489–1546)
- Ugye Seong Hon (1535–1598)
- Uam Song Si-yeol (1607–1689)
- Hanju Yi Jin-sang (1818–1885)
- Hwaseo Yi Hang-no (1792–1868)
- Toegye Yi Hwang (1501–1570)
- Yulgok Yi I (1536–1584)
- Seongho Yi Ik (1681–1763)
- Ban-gye Yu Hyeong-won (1622–1673)
- Baek-ho Yun Hyu (1617–1680)
See also 
- Essence-Function (體用)
- Korean Buddhism
- Korean Confucianism
- List of Korean philosophers
- List of Korea-related topics
- Contemporary culture of South Korea
- Religion in Korea
- Choi, Min Hong (1978), A Modern History of Korean Philosophy, Seoul : Seong Moon Sa.
- DeBary, Theodore (ed.), The Rise of Neo-Confucianism in Korea, New York: Columbia University Press, 1985.