”When Kim Il-Sung helped to create the DPRK, he became President of the Republic: this meant he was in charge of the military, and was head of state. He also was head of government for some time, and was General Secretary of the Central Committee, the highest body of the Worker's Party of Korea. When he died, the position of President was abolished, as there was no longer a need for that position. So the position's responsibilities were split up into the head of state, which was the new position of President of the Presidium, and the Chairman of the National Defense Committee. As Kim Il-Sung had already divested himself from being head of government, this position was left separate, as the Premier of the Cabinet. Now, with separate positions, Kim Jong-Il can't have inherited all of them; in fact the only position he "inherited" was Chairman of the NDC, appointed by the Central Committee. He was then elected General Secretary, but not of the Central Committee, of the party instead. Wheras Kim Il-Sung was in charge of the CC, Kim Jong-Il was not. So he had less power in this position than his father did, and his father had multiple positions. When Kim Jong-Il died, the General Secretary of the WPK was retired as a position. His son then was elected to be First Secretary, an new position in which he shares more power than his father did. Kim Jong-un then became First Chairman of the NDC, as Chairman was abolished. Here again, he shares more power with people as compared to his father. In 2014, the NDC was abolished. It's replacement, the State Affairs Commission, is made up of the new head of military, Vice Marshall Hwang Pyong-so (Kim Jong-Un is marshall but has not been running the military in any capacity), the Premeir of the DPRK, and commission members. Weheras the NDC answered to Kim Jong-Il, and later cooperated wtih Kim Jong-Un, the SAC is not beholden to Kim Jong-Un's orders. It is a committee where every vote counts. In each successive step, power is diffused, with other members of the party having more of a say in how the DPRK is run. Right now the main responsibility Kim Jong-Un has is helping to run the country; notice i said help, and not run. This is completely antithetical to how monarchies work: in monarchies all power is consolidated and preserved, as are property relations. The reason Kim Jong-Un gets these prestigious positions that lack power is because of the respect the DPRK has for the Kim family and its contributions to liberating Korea. Kim Jong-Un may be the last of the Kim family to hold such positions, and if this does happen, there are already mechanisms in place to replace him. He doesn't have the power to roll back any of these reforms or give himself more power"

[https://docs.google.com/document/d/1we5OEdteZFfAh11v0s_RVh3LWAkVICGrFnvksVynGxw]