GETTY Kim Jong-un is instructing teachers and professors to teach about an inevitable showdown

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In an editorial in state-run newspaper Rodong Sinmum, the director of the maverick state’s Institute for International Studies issued a terrifying prediction of an ultimate and devastating war. O Yong Ran said: “The US nature as man-killers has become all the more undisguised with the passage of time. “As leopard never changes its spots, the brutal nature of the US can never change.”

Exemplifying the type of teaching taking place within the secretive state, Yong Ran said it was the USA’s nuclear weapons which would ultimately lead to all-out war and the country's downfall.

GETTY North Korea's population are subjected to endless propaganda and indoctrination

He said: “The nuclear weapons were the foremost strength that helped the U.S. lord it over the world for a long time, stressing that now the nuclear weapons are no longer a monopoly of the US. “It will clearly realise before long what is precipitating its doom. This is the absolute fate the US, the empire of evil, has to face.” The chilling prediction highlights how deeply propaganda is embedded within North Korean society, with children, students and adults made to attend daily indoctrination classes.

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Yong Ran’s editorial in the Pyongyang-based newspaper gives a rare glimpse at the exact content of education under Kim Jong-un’s. However, South Korean spies and observers have reported a growing break-down of education in the country - and a subsequent growing anger at their crackpot leader’s leadership. Huge numbers of students bribed guards last month in order to avoid attending events marking the anniversary of the end of the Korea War.

GETTY Kim Jong-un's grip on control in the maverick state is thought to be slipping

GETTY The professor was quoted was promising "doom" for its Western enemies