Content warning : This story contains discussion of serious mental health issues and racism. T he panic attacks started after Chloe watched a man die. She spent the past three and a half weeks in training, trying to harden herself against the daily onslaught of disturbing posts: the hate speech, the violent attacks, the graphic pornography. In a few more days, she will become a full-time Facebook content moderator, or what the company she works for, a professional services vendor named Cognizant, opaquely calls a “process executive.” For this portion of her education, Chloe will have to moderate a Facebook post in front of her fellow trainees. When it’s her turn, she walks to the front of the room, where a monitor displays a video that has been posted to the world’s largest social network. None of the trainees have seen it before, Chloe included. She presses play. SOMEONE IS STABBING HIM, DOZENS OF TIMES, WHILE HE SCREAMS AND BEGS FOR HIS LIFE. The video dep...