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.
Homer Hulbert
Hulbert contributed to the advancement of Hangul with his research and study into the orthography and grammar of Hangul with Ju Si-gyeong. and he made the first han-geul (Korean) textbook '사민필지(Sa min pil ji)'.