The most influential figure, both in political and academical terms, in the period of the latter half of and the entire run of King SunJo's and GwangHaeGoon's respective regimes, was the Head of the Northern Faction at the time, RaeAhm Jung In-Hong. He was renowned as the most prominent figure of the Northern Faction during GwangHaeGoon's regime for his distinctive records of political actions and services, which included his taking initiatives back in the ImJin war crisis, his social background in the GyungSang WooDo area, his legitimate status in the academic society granted by his being one of Joe, Sik's disciples, and his unwavering loyalty for the King GwangHaeGoon. But his radical, straightforward attitude and political perspectives forced the opposing political parties to stand against him. He also promoted the cherishing project for his mentor Joe, Sik in a great hurry, which was also against the general consensus and wishes of the scholars. Hence, he became the primary target of the leaders of the revolution which had InJo as the new King, and was executed in the aftermath eventually. There were indeed some redeeming qualities in his life. He firmly maintained his principles of being loyal to the country, to the King, and to his mentor, although he had probably gone too far when he criticised TwaeGwae Lee, Hwang, or when he excessively insisted the executions of the convicted traitors to the country, in the process. Yet it is true that there have been too much of negative sentimentality and too many criticisms against him, which was in part actually engineered by the opposing Western Faction politicians at the time, who generally named him a rogue traitor. What was true, however, was htat he had also demonstrated certain personal principles and outright determination to stick to that principles throughout his entire life, which was also a typical trait for the Chosun SanRim scholars. More rational and reasonable evaluations of the character would be recommendable in the futrue. Efforts like that might also be instrumental in defining the political and academical position the Northern Wing personnels deserved to occupy in the history of the Chosun dynasty.

Ⅰ. 머리말 
Ⅱ. 鄭仁弘의 浮上 과정 
Ⅲ. 鄭仁弘의 學風과 政治權 
Ⅳ. 광해군대 南冥에 대한 學統강화 운동 
Ⅴ. 山林으로서의 역할과 한계

• 申炳周