From a scientific perspective there is some indication that a nuclear war could deplete the earth's ozone layer or, less likely, could bring on a new Ice Age - but there is no suggestion that either the created order or mankind would be destroyed in the process.
“I'm pretty good at remaining calm during an emergency. My house burned down when I was 12, which made me really pragmatic about what needed to be done. But I can be bad in that I compartmentalize a lot of emotions and push them away to deal with them at a later date.”
“I didn't finish the stories until we went to the Philippines and I got malaria. I couldn't work and I didn't have any money, but I had seven stories. So I wrote three or four more.”