After the Soviet Union collapsed and the Cold War ended in the last decade of the 20th century, American strategists turned their sights on another threat: the potential havoc that might come from a group of smaller countries like North Korea and Iran that the Americans called "rogue states." That name was a wonderful metaphor. It reminded everyone of "rogue elephant," the term that hunters and wildlife experts use for an elephant that breaks from the herd, follows its own rules, and goes on wild rampages. The antics of a rogue elephant sounded just like the threat of a rogue state, especially a rogue state trying to arm itself with nuclear weapons. But the metaphor had one flaw. No one tries to negotiate with rogue elephants. Hunters simply kill them...