Sophie Zhang worked as a low-level Facebook data scientist nearly three years before was she fired in the fall of 2020. On her final day, she posted a 7,800-word memo to the company’s internal forum — a common practice for departing employees. In the memo, first published by Buzzfeed, she outlined evidence that governments in countries like Azerbaijan and Honduras were using fake accounts to influence the public. Elsewhere, such as India and Ecuador, Zhang found coordinated activity intended to manipulate public opinion, although it wasn’t clear who was behind it. Facebook, she said, wasn’t taking her findings seriously.