Answer:
Confucianism
Step-by-step explanation:
Even today, Confucianism's ideas have noticeable influences in the Korean society; including their way of life, social relations between older and younger people; moral system; and more. It is considered often as a pragmatic way of keeping unity in the Nation and also, a way of thinking inherited by the Goryeo (or Koryu) dynasty since it was highly supported by the king Seongjong of Goryeo.