By Cade Metz and Daisuke Wakabayashi, December 3, 2020

A well-respected Google researcher said she was fired by the company after criticizing its approach to minority hiring and the biases built into today’s artificial intelligence systems.

Timnit Gebru, who was a co-leader of Google’s Ethical A.I. team, said in a tweet on Wednesday evening that she was fired because of an email she had sent a day earlier to a group that included company employees.

In the email, reviewed by The New York Times, she expressed exasperation over Google’s response to efforts by her and other employees to increase minority hiring and draw attention to bias in artificial intelligence.

“Your life starts getting worse when you start advocating for underrepresented people. You start making the other leaders upset,” the email read. “There is no way more documents or more conversations will achieve anything.”

Her departure from Google highlights growing tension between Google’s outspoken work force and its buttoned-up senior management, while raising concerns over the company’s efforts to build fair and reliable technology. It may also have a chilling effect on both Black tech workers and researchers who have left academia in recent years for high-paying jobs in Silicon Valley.

“Her firing only indicates that scientists, activists and scholars who want to work in this field — and are Black women — are not welcome in Silicon Valley,” said Mutale Nkonde, a fellow with the Stanford Digital Civil Society Lab. “It is very disappointing.”