Koreans dream an expensive dream.

In it, North and South Korea are one people, one nation, united under one state. If it happened peacefully, China and Japan would suddenly have a new neighbor of 70 million people, home to some of the world’s most dynamic technological innovators with a new labor base.

But the expense comes from the wide gulf that has emerged between the two over their decades of separation: North Korea is decades behind its Southern neighbor technologically, there is a vast gulf between it and the South in standard of living, and the price tag for ameliorating