“And how many thermonuclear warheads do you think there are on Earth today?” He paused. “Thirty. Thousand.” Without saying anything else he reached down and picked up a sack of pellets, and tipped them into the bucket, first one at a time, then as a torrent. The sound was deafening, terrifying. At that moment, every person in that room understood deeply, viscerally, why this issue matters.