Unification is not our present goal. That is a future program.
If America would withdraw from South Korea, there could be a power struggle between such as China and Japan.
Well, that is very imperative to let North Korea open door to outside.
There is some sign that North Korea is changing recently. There is ongoing successful negotiation to have a military talk to Pyongyang, which has been stopped for seven years.
Only the truly magnanimous and strong are capable of forgiving and loving.
So if North Korea continues present isolation, then with such economic difficulties the North Korean government must meet a very serious situation in the future.