If AI ends up fulfilling the extravagant promises that have been made for it, a new chapter of history will open. But the story of its frenzied pursuit will make the textbooks, too https://www.economist.com/leaders/2025/09/11/what-if-the-3trn-ai-investment-boom-goes-wrong?taid=69e631801677ba00014485af&utm_campaign=editorial-social&utm_content=discovery.content&utm_medium=social-media.content.np&utm_source=voante