The Koreans changed their writing system because of Christianity? Why?
The Koreans used to write in Chinese characters , which Koreans refer to as Hanja script. But around the mid 15th century, the Joseon Dynasty of Korea formally declared that they would use their own , indigenous writing script known as Hangul.
What differentiates Hangul (now used in Korea) with Hanja is that Hangul is based on phonetics (vowels and consonants). It is similar to the Japanese script of Katakana and Hiragana, which are also based on consonants and phonetics. Japanese written language use a mixture of Chinese characters (known as Kanji) and our own indigenous phonetic alphabetic system (known as Katakana and Hiragana).
It was the Korean monarch , King Sejong the Great who ordered the use of Hangul as the state writing system , and forever banished Hanja (Chinese writing) as secondary. To this day, Hanja is non-existent. The reason for this was -- an act of legitimacy. By removing Chinese writing system and establishing an indigenous Korean writing system, they were forming their own 'Joseon' identity. A Korean identity.