The number of nuclear weapons possessed by the US and Russia is a fraction of what it was during the height of the Cold War. Successive presidents on both sides, since the time of John F. Kennedy and Nikita Khrushchev, have feared their destructive power. Their supposed value, so called Mutually Assured Destruction, known by its capitals, MAD, is in fact valueless. They cannot be used, and nearly everyone accepts that. Yet they continue to exist and, as President Mikhail Gorbachev and his ally in nuclear arms control, President Ronald Reagan, both said, there is the fear of a false alarm or two errant officers in the silo entering simultaneously their keys which allows the firing of the rocket. Yet here we are in 2019 with a new American nuclear initiative just announced last weekend. (I doubt that president Donald Trump is in the clutches of Russia. Otherwise, why would...