Silhak
Jeong Yak-yong, 1762–1836 (informally known as "Dasan"), leading the third wave of Silhak. Like a number of other Silhak scholars, he was interested in some Christian ideas. He suggested a "village land system," in which the village would hold its land in common and farm the land as a whole, while the products of the land would be divided based on the amount of labor. He wrote The Mind Governing the People (목민심서) and argued that a high social class order with the king at the top was not good.