One of the joys of writing about business is that rare moment when you realize that conventions are changing right in front of you. It sends a chill down your spine. With vainglory, you begin to scribble every detail of your surroundings, as if you were writing the first lines of a best seller. It happened to your columnist recently in San Francisco, sitting in the pristine offices of Anthropic, a darling of the artificial intelligence (AI) scene. When Jack Clark, one of Anthropic’s co-founders, drew an analogy between the Baruch Plan, a (failed) effort in 1946 to put the world’s atomic weapons under UN control, and the need for global coordination to prevent proliferation of harmful atomic weapons. AI, I felt that old familiar tingle. When entrepreneurs compare his creations, even tangentially, to nuclear bombs, he feels like a turning point.