Political Science: Realism/Neorealism in Application to North Korea's Nuclear Development

Hello all,

Working on an International Politics paper in which we are expected to consider a current international dilemma within the framework of two different theories. I chose to focus on neoliberal institutionalism, as well as realism. I pretty much have the neoliberal stuff on lock, but I'm having trouble explaining the topic through the lens of realism.

Essentially, we are expected to make a thesis on which theory, of the two, explains the conflict better. Could anyone give me some advice as to how I could apply realist theory to North Korean nuclear development?

Thanks in advance, and I can elaborate further if need be.