“When I went to prison he disowned me. There will always be wars, he said. No there won’t, I said. Shit no, I said, are you crazy? That was roughly forty years ago. It was apparent to me then that war must soon become totally unthinkable. It happened even quicker than I’d thought it would. And so now we most of us do the best we can never to think of it, even though, as I write, about one-fourth of the world’s best technological and scientific minds are employed full time in preparing for this unthinkable war. . . .”