Sorry, Eric, but I rate climate change the number 2 threat to humanity. The odds are overwhelming that nukes will beat climate change to doomsday. Yes, you can say that climate change is already taking a toll on humanity, but nukes are instant death. Just one political miss calculation (think of impetuous Trump) or technical glitch and the world is toast. We have been hanging by a thread on that account since the mid sixties. Our incredible good luck can’t hold out much longer.