The North Korean dictator has only one objective and that is staying in power. Everything else is an illusion. The nuclear weapons are his guarantor.  Without them he's just another Quaddafi or Saddam. Hence, diplomacy is a fool's errand.   We can leave him alone, secured in the knowledge that he will not attack us because that would mean his certain death or we can go to war.  The real question is, how much does the world really care about the suffering of the North Korean people?