The main problem with NK is the lack of trust and respect between them and the rest of the world, they don’t respect the rules of other nations (look at the NK kidnappings of Japanese citizens), this makes it very difficult to deal with them.

So trust and respect needs to be built up from the ground up.

As it stands now, even small lifted sanctions should be expected to be exploited by NK.

To start work to handle NK, the world could start by involving NK in talks, generic talks, acknowledging their existence outside of just conflicts and mandatory communications.

Talking will lead to better understanding which we can use to slowly try and lift some sanctions, and working from that angle.