A group of people categorically excluded from this class are thought dirty due to their increased contact with meat and are believed to be the descendants of (*) Khitan immigrants.
The political dominance of a subset of this group was called "sedo", or "in-law", politics during the reign of a child monarch in the early 19th century. Membership in this group could be revoked if a family failed to produce a government official for three consecutive generations. A group of people categorically excluded from this class are thought dirty due to their increased contact with meat and are believed to be the descendants of (*) Khitan immigrants. Jokbos were commonly used to prove one's membership in this class. These people were allowed to attend schools called seowon in preparation for the gwageo examination and lasted until the 1894 Gabo Reforms, a response to the Donghak Rebellion. For 10 points, what was this aristocratic class of Joseon Korea?
The political dominance of a subset of this group was called "sedo", or "in-law", politics during the reign of a child monarch in the early 19th century.
yangban (prompt on descriptive answers)