What might bring us (the US, South Korea, Japan) to deliberately attack North Korea? Are there triggers for deliberate (advertent) escalation, on top of the traditional, nuclear age fears of accidental (inadvertent) escalation? The following is from my essay on this for 1945 magazine and Twitter thread.

To me it seems like the most likely trigger for us to deliberately bomb NK is NK building a nuclear missile-carrying submarine (an SSBN). An SSBN would significantly improve the ‘survivability’ of NK nuclear missiles, which is problematic for us two reasons:

1. A more survivable force would reduce the ability of the allies to disarm NK by force if necessary in a crisis, because it is much harder to find missiles undersea than on land. The land constraint on NK missiles is particularly tough for them, bc NK is small in size, too poor to build a lot of roads, and is fill with mountains and forests.

2. If NK’s nuclear force was more assured and survivable, NK might take greater conventional risks in its provocations of SK, per the logic of the stability-instability paradox. NK has long history of shenanigans along the SK border. One of these spinning out of control has always been the big inadvertent escalation risk in Korea. That will worsen once they have an SSBN fleet.

Given that the US has long sought ‘damage limitation’ in its nuclear affairs – that is, America persistently rejects mutually assured destruction (MAD) as acceptable and inescapable – it is foreseeable that the US would see bombing a NK SSBN under construction as an acceptable risk to keep NK from attaining a MAD relationship with the US.

We claim close to bombing NK in 2017/18 because they were on the cusp of an ICBM which could reach the US mainland, and we have repeatedly intervened in Iran to halt its nuclear progress. So bombing NK to block the advent of MAD is not fantastical. Of all the possibilities for deliberate, chosen escalation with NK, I think this is the most likely.