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More than 800 public figures — from Nobel-winning scientists and former military leaders to artists and British royalty — signed a statement urging a halt to work that could lead to AI superintelligence, citing risks to humanity. Organized by the Future of Life Institute, the call seeks a prohibition until there is broad scientific consensus on safety and strong public buy-in. Signers include Geoffrey Hinton, Mike Mullen, Will.i.am, Steve Bannon, and Prince Harry and Meghan. Major tech CEOs did not sign. The group hopes to spur global debate and potential treaty action as AI investment accelerates.

Prepared by Jonathan Pierce and reviewed by editorial team.