N. Korea consistently bucked the trend in communist bloc for decades. It is the only country which was obsessed with preserving rule by personality cult. Hereditary succession has become indispensable. Even after death, Kim Il-sung's successor will renounce the Kim's supposed greatness. He wanted to be a grand idol in perpetuity. The only folks who can be trusted to carry out this job are his descendants.
It all started as one man's egomania who wanted to be exalted in his personality cult forever. Juche, self-reliance, is a strategy and ideology to ensure his untarnished greatness preserved. The legitimacy of his personality cult is earned from Juche. Juche should be put into action from time to time, to keep it fresh and alive. That is why N. Korean regime needs periodic provocations or some outrageous political maneuvers. To show that NK's godly great leader is indeed great, which justifies his status.
However, it has run its course. It will bite the dust, leaving behind a gruesome mess, which people around the world ponder over for many years to come.
N. Korea is an unique country which faced the same situations with the rest of communist world but learned the exactly opposite lessons from it time and again.
Out of curiosity, do you know the history of Vladimir Kim of Kazakhstan, and the other Koreans who run the much of the oil and mining industry in Central Asia?
http://www.forbes.com/lists/2007/10/07billionaires_Vladimir-Kim_MWC1.html
I know a bit of the history of the Koreans who had been Japanese laborers in the southern half of Sakhalin Island who were kept there after World War II when the Soviet Union took control of the entire island, but I don't know the details of the Korean settlement of Soviet Central Asia and I'm wondering if these North Korean defectors were in that group.
Thanks for the insight.