(sometimes spelled 'CHOS'N' or 'CHOSON') Korean name for Korea or "The Land of the Morning Calm" General Yi Song-gye established the Yi dynasty in 1392 and it lasted until 1910 when Korea was renamed Chosen, or the Land of the Morning Calm. A completely new capital city was formed in Seoul. Confucian political principles formed the basis for the government. The social organization was also based on Confucian precepts. There were four classes: the Yangban (nobility), the Chungin(middle people); the Sangmin (commoners); and, the Ch'onmin (lowborn) The social status of individuals was hereditary.