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.
Origin of Hangul
The seven basic vowel letters were not adopted from an existing script. They were straight lines, dots, and lines with dots that appear to have been designed by Sejong or his ministers to represent the phonological principles of Korean. At least two parameters were used in their design, vowel harmony and iotation.