In 2014, two 12-year-old girls stabbed a friend, arguing that they did it for a fictional internet horror creature named Slender Man. Lisa Miller tries to understand why in New York magazine:

By the age of 8 — and definitely by 12 — psychologists agree, most children are as able as adults to sort out what’s real from what is not. What sets children and adolescents apart from adults is a mental task psychologists call “discounting” — the rational inner voices that can subdue overheated emotional responses to the imagination’s powerful projections and that come with the maturing of the frontal lobe by around age 25. That’s why a 50-year-old can finish rinsing her hair even as she recalls the shower scene from “Psycho,” while a 16-year-old will find herself with a racing heart, soapy and dripping on the mat. But the feeling of being in the thrall of a fantasy (even a morbid one) can be seductive as well, as comforting as getting high, as mesmerizing as Minecraft.

In this way, the friendship of Anissa and Morgan, with its shared obsessions and mutually satisfying imaginary play, was the rather unremarkable effort of two bright, alienated kids to build a world more thrilling than their reality, a private bubble that offered them belonging, excitement, and a sense of their own power. The problem wasn’t that Morgan and Anissa didn’t know they were living in a fantasy world: Ultimately, when pressed by adults, they acknowledged the difference between fantasy and reality. The problem was that they couldn’t — or didn’t — extricate themselves from the ­fantasy. “He does not exist,” Anissa told police on the day of the stabbing. “He is a work of fiction.” Morgan, the more troubled one, had a more enduring attachment to the fairy tale they had told themselves and that had brought them to the woods. But even she admitted, in her interview, that the attack on Bella was “probably wrong,” she said. “I honestly don’t know why we did this.”

Read the story