The disciples of Kim Chang-hyeop·Kim Chang-heup from the latter half of the 17th century to the beginning of the 18th century had established academic tradition of the early Nak school. Kim Chang-hyeop's disciples had been characterized in the field ...
The disciples of Kim Chang-hyeop·Kim Chang-heup from the latter half of the 17th century to the beginning of the 18th century had established academic tradition of the early Nak school. Kim Chang-hyeop's disciples had been characterized in the field of literature·Neo-Confucianism, afterwards some figures from that had joined Soron faction. Kim Chang-heup's disciples had had many of them leave brilliant achievements in the scope of literature·Neo-Confucianism, however what seems interesting to us is that they went through the Calamity of Noron literati of 1721·1722 and happened to take on a sudden conservative atmosphere in their academic tradition. As a result of this type of conservative trend, other figures who were closely related to Soron and were not actively involved with the movement of Anti-Policy of Impartiality had great difficulty in succeeding to Nak school. Under these circumstances, Yi Jae, who had not been under the instruction of Kim Chang-hyeop·Kim Chang-heup, happened to lead Nak school.
The view of Yi Jae, in light of theory on the nature of the mind, was clearly differentiated from that of Ho school, however he succeeded to realistic view of Song Shi-yeol, which was not much difference from that of Ho school. It is closely related to the academic tradition of Noron that was consistently lead only by Eui-ri centered basis. However Noron's Eui-ri gradually came to realize, thereby an academic trend which tried to get away from that was centered upon only Eui-Ri theory happened inside Nak school. Most of disciples of Yi Jae were faithful with Eui-ri theory, however some came to start to pay interest to the administrative theory whether or not it was limited. The interest paid to the administrative theory was mostly expressed through Ban-gye-surok. That was not a big change, but an important one in the academic tradition of Nak school.
Nak school in the latter half of the 18th century had developed in closer relation with conflict between Gong-hong and Bu-hong conflict and division of Sipa(Party of Expediency) and Byeokpa(Party of Principle). Ever since outbreak of the Calamity of Soron literati of 1755, Noron's Eui-ri was mostly accomplished in the political world, therefore the academic world of Nak school would be able to be free from Eui-ri theory in a way, which gave birth to various academic trends thereafter. This is one of the most important parts which can explain division of the Nak school. Nak school in those times largely divided into disciples of Kim Won-haeng and that Min Woo-soo. Kim Won-haeng’s disciples stuck to that of Nak theory on the nature of the mind, rather closer to the position of Bu-hong and Sipa. On the other hand, Min Woo-soo's disciples took on a tendency of Gong-hong and Byeokpa with it closely connected to Ho school. They also seemed to get near to Ho school's side from the aspect of theory on the nature of the mind.