More than 1,100 public figures have signed a statement calling for a prohibition on the development of superintelligence. The signatories included Nobel laureate Geoffrey Hinton, former Joint Chiefs of Staff Chairman Mike Mullen, Apple co-founder Steve Wozniak, entrepreneur Sir Richard Branson, former chief strategist to President Trump Steve Bannon and Turing Award winner Yoshua Bengio. The statement was organized by the Future of Life Institute, led by Anthony Aguirre, a physicist at the University of California, Santa Cruz. It proposes halting work on superintelligence until there is broad scientific consensus on safety and strong public support.

The institute’s biggest recent donor is Vitalik Buterin, a co-founder of Ethereum. Notable tech executives did not sign the statement. Meta CEO Mark Zuckerberg said in July that superintelligence was now in sight. OpenAI CEO Sam Altman said last month he would be surprised if superintelligence did not arrive by 2030.