Prefatory Note: I have been preoccupied for many years with the multiple challenges posed by nuclear weapons, initially from the perspective of international law and morality, later with regard to prudence diplomacy and political survival in international relations, and in all instances, with an eye favoring deep denuclearization associated in my mind with an abiding abhorrence over the use of atomic bombs against the cities of Hiroshima and Nagasaki at the end of World War II and with the avoidance of any future use of nuclear weaponry or even threatened use.