These Strongly Appear to Be the Old Tweets of That Anthropic Employee Who Quit Citing Risks to Humankind and They Are… Pretty Bizarre

Internet sleuths have uncovered old posts that seem to belong to Jacob Coxon, the former Anthropic employee who ignited the AI safety movement with his alarming claim that the technology "could kill us all by the end of the decade." Coxon's current X account, @hilbertspaess, was established in 2026, but researchers discovered two earlier accounts under the same handle between 2021 and 2024.

The first account, which dates back to November 2021, used "Jacob Coxon" as its first display name. The evidence linking the second account created in 2023 to Coxon is less certain, but the tweets appear to be written in the same style and discuss similar topics as the first.

Given Coxon's fervent warnings about AI's existential risks to humanity, observers have focused particular attention on the account's posts about climate change, a known existential threat not only to humans but to all life on Earth, which is already underway. In response to these tweets, a researcher compiled the posts into an easily searchable database.

Coxon's claims about climate change were particularly striking. Upon reading a March 2022 tweet, observers might have questioned whether he was genuinely concerned about climate change or merely engaging in trolling. The account expressed skepticism about climate change's importance and even suggested that positive consequences could come from a hotter planet.

The account also expressed disdain for efforts to save the rainforest, calling it a "festering pit" and questioning why anyone would want to protect it. The account even made a bizarre Holocaust reference, stating that six million deaths were a "palpable taunt."

While some of the posts appeared to be trolling, they revealed a deep-seated skepticism about the importance of addressing climate change. The account also expressed incredulity at the severity of climate change, stating that it seemed like a "very slow process." When Coxon was interviewed by Fox News shortly after his post went viral, he downplayed the significance of climate change, claiming that global warming doomsday scenarios were overplayed and that the idea of a climate apocalypse was "completely absurd."