Silhak
Yi Ik, 1681–1764, of the second generation of Silhak scholars, founder of the Gyeongsechiyongpa (경세치용파 經世致用派 School of Administration and Practical Usage), helping economy, and government administration. This is known as the "equal field system" and was supposed to give enough land for each farmer to live. Yi Ik, different to the neo-Confucians, believed that subjects such as geography and mathematics could be real teachings.