Teen girls' depression rates doubled between 2011 and 2019
The numbers were already alarming before COVID arrived. Jonathan Haidt spent years trying to understand why one particular cohort fell apart — and when.
The CDC runs a biennial survey of youth behavior, and when researchers examined the 2021 results, one number stopped them: 57 percent of American teen girls reported persistent sadness or hopelessness, up from 36 percent in 2011. The suicide-consideration rate for girls rose from 19 percent to 30 percent over the same period.
Haidt and his colleagues noticed that the rise tracked closely with something that changed around 2012: the mass adoption of front-facing camera smartphones among adolescents, and the rapid growth of Instagram, which launched in 2010. They called it the Great Rewiring — a shift from a play-based childhood to a phone-based one, compressing changes in social life, sleep, and attention into a period of neurological and psychological vulnerability.
The effect was not equal. Boys' rates also worsened, but less sharply. Platforms built around social comparison — photos, follower counts, likes — disproportionately struck adolescent girls, for whom peer social approval is a particularly high-stakes currency.
The data is correlational, and Haidt's causal claims remain contested among researchers. But the pattern he identified exists in multiple countries, across multiple data sources, and started at a specific moment. That specificity is itself something that needs explaining.