On Wednesday evening, a letter appeared on the website of the Good Law Project, a British legal campaign group. In it, Professor Jason Arday announced his resignation from the University of Cambridge and Jesus College “with immediate effect”. The words were those of a man who had reached a breaking point: “The relentless accusations, speculation and public commentary have taken a profound toll on me and on those I love,” he wrote. “I have concluded that the only way to bring this chapter to an end is to step away.”

The departure, just hours after Cambridge disclosed it had begun an investigation into “new information” about his academic qualifications and honorary appointments, marked a dramatic fall for a scholar whose appointment in 2023 had been celebrated worldwide. Arday, then 37, became the youngest black professor in the university’s history. His personal story — diagnosed with autism, non-verbal until age 11, unable to read or write until 18 — was hailed as a triumph of perseverance. “Thousands celebrated not simply my appointment, but what it represented,” he recalled in his resignation letter.

That narrative began to unravel after Nathan Cofnas, a US academic and self-described “race realist” whose own Cambridge affiliation ended in 2024 amid racism accusations, published a Substack article alleging extensive plagiarism in Arday’s doctoral dissertation. The claims, which Arday has denied, snowballed into questions about other achievements: his assertion that he once ran 30 marathons in 35 days and raised millions for charity, and even the account of a masked intruder in his office. Arday admitted making academic “mistakes” but told The Times he was being portrayed as “a liar and a fantasist and an academic fraud”. He and his supporters argued that the scrutiny was racially motivated, a charge that gained traction as right-wing newspapers and commentators seized on the case to label him a “poster boy” for diversity, equity and inclusion policies.

The controversy has drawn in voices far beyond Cambridge. An open letter supporting Arday and condemning “an attempt to undermine black people who hold positions of influence” gathered more than 15,000 signatures, including prominent black academics and Cambridge leaders. Simon & Schuster, which is set to publish his memoir Great and Unfortunate Things this month, said it was “proud to publish” his story, noting that no plagiarism allegations had been made against the book. Meanwhile, the university and Jesus College have launched parallel investigations, leaving the full extent of the allegations unresolved.

In his final public statement, Arday insisted that his resignation was “not the end of my work”. He said he needed “time to heal… and be myself again”, before adding a simple, defiant promise: “I will return.”