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.
Joseon
During the rule of Sejong, Korea saw advances in natural science, agriculture, literature, traditional Chinese medicine, and engineering. Because of such success, Sejong was given the title "Sejong the Great". The most remembered contribution of King Sejong is the creation of Hangul, the Korean alphabet, in 1443; everyday use of Hanja in writing eventually was surpassed by Hangul in the later half of the 20th century.