Hangul supremacy
Hangul supremacy is the belief, most widespread in Korea, that the Hangul alphabet developed by King Sejong the Great's Hall of Worthies in 1443 is the simplest, most logical, most beautiful and most scientific of the world's writing systems. In its extreme form, the belief holds that Hangul is in fact best suited for the expression of sounds in all languages.
History of the Joseon dynasty
During the rule of Sejong, Korea saw technological advances in natural science, agriculture, literature, and traditional medicine. Because of his success, Sejong received the title "King Sejong the Great of Joseon". His most remembered contribution is the creation of Hangul, the Korean alphabet, in 1443. Before that, Korean literati had used the Hanja writing system—traditional Chinese characters with Korean pronunciation and meaning—and a written language known as Hanmun, which was basically Classical Chinese, for official court documents. Everyday written use of Hanja and Hanmun ended gradually in the latter half of the 20th century.