Prince Harry and his wife Meghan have joined prominent computer scientists, economists, artists, evangelical Christian leaders and American conservative commentators Steve Bannon and Glenn Beck to call for a ban on AI "superintelligence" that threatens humanity.

The letter, released Wednesday by a politically and geographically diverse group of public figures, is squarely aimed at tech giants like Google, OpenAI and Meta Platforms that are racing each other to build a form of artificial intelligence designed to surpass humans at many tasks.