Has social media broken our brains?: Anxious generation
Molly Russell was fourteen. Her father opened her Instagram after she died and found thousands of posts about self-harm and suicide, escalating in graphic intensity, delivered by a recommendation engine that treated her darkening engagement as a signal to go darker. The coroner ruled Instagram contributed to her death. A recommendation system did exactly what it was built to do.
We have the curves. Depression up 145 percent among girls since 2010. Self-harm ER visits nearly tripled for ten-to-fourteen-year-olds. The onset tracks not with poverty, not with family structure, but with the year the phone moved from pocket to hand to face. Jean Twenge flagged the inflection in 2017. Haidt built the evidentiary architecture in 2024. The increases are steeper for girls, steeper for younger teens, and international.
The replication critics tell us the effect sizes are small. Lead paint had a small effect size per unit of exposure. The question was never one chip of paint. It was millions of children exposed continuously for years. Three billion people spending waking hours inside architecture that rewards outrage and comparison is not a small effect. It is a civilizational experiment conducted without consent on a generation that cannot opt out because opting out means social death.
The digital natives point to the queer kid in Arkansas. We believe them. The plural of anecdote is not data, and the data says the net effect is negative. The attention economy is not a metaphor. It is a business model in which human attention is the commodity sold. Every scroll is a slot machine pull. The builders told us what they built. Sean Parker said it. Chamath Palihapitiya said it. Tristan Harris said it. We are the ones who keep pretending we did not hear.
Where we concede ground: The causal arrow has not been established with the rigor of smoking and lung cancer. We know.
What would change our mind: Phone-free school cohorts showing no improvement after five years of rigorous tracking.
Read the full synthesis: Has social media broken our brains?