Taoism or "Do" is thought to be the earliest state philosophy for the Korean people spanning several thousand years. However, its influence waned with the introduction of Buddhism during the Goryo kingdom as the national religion and the dominance of neo-Confucianism during the Joseon kingdom. Despite its diminished influence during those periods, it permeated all strata of the Korean populace, integrating with its native animism as well as Buddhist and Confucian institutions, temples, and ceremonies. The Taoist practice in Korea developed, somewhat in contrast to China, as an esoteric meditative practice in the mountains taught by the "mountain masters" or "mountain sages". One of Korea's well-known founding myths in which a tiger and a bear seek to become human during an encounter with Hwanung may be viewed as a Taoist parable. The exact origin, despite various theories by historians, is in question because the royal records maintained by the early Korean kingdoms were destroyed during the two occasions in which the royal libraries were burned by invading Chinese armies. Later attempts to study the history and philosophy of Korean Taoism were suppressed during the Joseon kingdom which embraced only Confucianism as the proper field of study.
Broadly speaking, Taoism, Confucianism, and Buddhism infused native Totemism and Shamanism from the earliest centuries of the Common Era, but Buddhism dominated official thought during Silla and Goryeo dynasties, replaced by Confucianism during the Joseon Dynasty.
Very little writing on Taoism survived prior to the 20th century. Until recently, Taoism in Korea received little attention from scholars, usually only described as a "romantic influence" or "literary theme" within other contexts.