“Well educated workers’’? How does closing your country off to the rest of the world, brainwashing and constant indoctrination make for ‘’well educated workers’’?
They built nuclear bombs and missiles almost from scratch. Not many small, poor countries with 25 million souls could accomplish that. We had 132 million people in 1940 when we started work on the atom bomb and it took 5 years, an army of scientists and workers and a treasure trove of money to accomplish it.