Palantir cofounder Joe Lonsdale rejected concerns that advanced artificial intelligence could cause mass human extinction, saying leaders were managing the risks and should not frighten the public. His Saturday post came after Anthropic engineer Jacob Coxon left the company and warned that frontier AI firms such as Anthropic and OpenAI were taking dangerous risks. Anthropic CEO Dario Amodei subsequently said AI swarms could soon control the entire internet and called for stricter safety rules and a globally coordinated slowdown in development. SpaceX CEO Elon Musk, OpenAI CEO Sam Altman, Google DeepMind founder Demis Hassabis and Hugging Face CEO Clément Delangue said they agreed with Amodei. Lonsdale, a conservative contrarian who co-founded the University of Austin with Bari Weiss in 2021, appeared closer to President Donald Trump's view that AI warnings describe risks that will not occur. Palantir, the AI software company he helped found and later left, reported 93% year-over-year revenue growth in the second quarter, which it attributed to enterprise software purchases.