I think my comment was that moral realism denotes this tendency to want justice, peace, disarmament, and the realization that interests clash and therefore it is possible to achieve only some of it. So nuclear disarmament falls, as all other types of disarmament, in the category of if the nuclear states can do it together, proportionally at the same time, then nuclear disarmament is highly desirable. If it means unilateral nuclear disarmament, I would say the political insecurity of the world is such that it would not be desirable.
On May 1st, 2014. See this statement in context.