On a Twitter account called So Sad Today, the American writer Melissa Broder has been sending out snippets of her daily inner life since 2012. Broder writes about mundane sadness—”waking up today was a disappointment” or “what you call a nervous breakdown I call oops, accidentally saw things as they are”—and she is brutally honest about her own shortcomings (“whoops, hurt myself conforming to socially accepted standards of beauty that I know are false but still feel compelled to fit into” or “just felt a flicker of self-esteem and was like what the fuck is this”). The account has become a sensation, winning her more than 675,000 followers, and Broder’s book of personal essays about her mental-health battles, also named So Sad Today, appeared in 2016.