The heads of major artificial intelligence firms pleaded with the United Nations on Wednesday to save the world or at least its people – by somehow regulating the fast-expanding technology that they have been designing. “If managed poorly, I even believe AI could be a risk to humanity as a whole,” said Dario Amodei, chief executive officer of Anthropic. And from his competitor Sam Altman, CEO of OpenAI, came this assessment: “We could lose control of the future to AI.” Both said the countries of...