How to End Civilization as We Know It
Doomsday scenarios were ever-popular during the Cold War. But the reality was that if a nuclear missile hit a U.S. city, we would know for sure who launched it: the Soviets. Thus we knew against whom to retaliate. And thus the Cold War was conducted without a single nuclear shot fired.
We are now facing a threat an order of magnitude or greater than that of the Cold War. What if a nuclear bomb goes off in a U.S. city and we're not sure who did it, so we don't know against whom to retaliate?
