Teller contended, not implausibly, that hydrogen bombs keep the peace, or at least prevent thermonuclear war, because the consequences of warfare between nuclear powers are now too dangerous. We haven't had a nuclear war yet, have we? But all such arguments assume that the nuclear-armed nations are and always will be, without exception, rational actors, and that bouts of anger and revenge and madness will never overtake their leaders (or military and secret police officers in charge of nuclear weapons). In the century of Hitler and Stalin, this seems ingenuous.
I feel a special kinship for our military. Because, unfortunately, I became a wartime president. And committed our military in the defense of our country to difficult assignments. I tell people all the time, I don't miss much about being president; I do miss looking in the eyes of people who volunteered to serve. And so not only do I feel a kinship, I feel an obligation and a duty to help.