It is very difficult to talk about "appeasement of threats" from history and nuclear warfare in the same thread.  There has never been nuclear war.  Hopefully there never will be nuclear war.  Negotiations and diplomacy among all nations of the world (not just the U.S.) could go further to create a non-nuclear solution.  Reagan belonged to a different time, and certainly Trump is no Reagan and North Korea is no Russia.    In this place and time, the world needs to find a solution negating the use of nuclear bombs as a bully move.  We've always known the greatest threat for nuclear war was a nutjob leader with a finger on the bomb, and now we have two such nutjobs.