Two pre-humans are shivering in a cave. On hearing a nearby lightning strike, one rushes outside to fetch a flaming faggot of wood ignited by the lightning. The other, fearing an existential threat to life, rushes to extinguish the fire. It was the first argument over global warming. People have been fretting over many such real and imagined threats to the planet ever since. Climate change, Y2K, flu pandemics, Clinton/Obama foreign policy. You name it, it’s an apocalyptic menace. Patrick Keeney is tired of it, and has concluded that news of Armageddon is greatly exaggerated.