Fixing North Korea

[BadBoyBenny]

With the benefit of hindsight, what changes could have been made in American foreign policy over the last 60 years that would have led to an avoidance of the current situation with North Korea. Not just that there’s a dictator that has nuclear weapons, but the pitiful state of existence for the North Korean citizens.

What mistakes were made that could have been avoided?
Which administration made the biggest mistakes?
Could the war have been ended better? How and at what cost?
What could have been done during the cold war?
What about the last 15 years?

Who can come up with the best plan here, the sensitively nuanced liberals or the armchair admiral conservatives?