
Jonathan Haidt
A powerful investigation into how smartphones and social media rewired childhood, fueling a global youth mental health crisis.
Jonathan Haidt is a leading voice in moral psychology and has taught at NYU's Stern School of Business.
Section 1
6 Sections
Imagine sitting in a room filled with the gentle hum of evening, the world outside growing quiet as the sun sets.
What made this wave so striking was its timing. If you look at graphs of mental health, you see a sudden, sharp rise around 2012. It’s as if a switch was flipped. Hospital visits for self-harm among preteen girls nearly tripled in a decade. Rates of depression and anxiety soared, especially among girls, but also affecting boys and even college students. These changes were not isolated to one country or culture. The same patterns appeared in Canada, the UK, Australia, and the Nordic nations, revealing a global phenomenon with a shared root.
Some tried to explain the crisis by pointing to economic downturns or political upheaval, but the data told another story.
Everywhere, the stories began to sound the same. Parents described constant conflict over devices, the struggle to enforce limits, and the feeling of powerlessness as their children vanished into glowing screens. Teens spent hours scrolling, posting, and comparing themselves to others, their sense of self-worth tied to likes and comments. Even when surrounded by family, many felt isolated, forever elsewhere.
It was not just what young people said. Behavioral evidence confirmed the reality: hospitalizations for self-harm, especially among girls, rose dramatically. Emergency rooms saw more adolescents with injuries from cutting, overdosing, or other forms of self-inflicted pain.
So what changed? The answer lies in the devices that became ever-present in our lives. The rapid adoption of smartphones and the explosion of social media platforms marked the end of the play-based, in-person childhood and the beginning of a phone-based, digital one. By 2012, most teens had smartphones, and their social lives moved online, where the rules were different and the stakes often felt higher.
As we step into this story, we begin to see that the tidal wave of anxiety and depression is not a mystery, but a signal—a call to understand what our children need, and what we must reclaim for them.
7 more insights available in app
Unlock all 6 sections, 8 insights, full audio, and interactive mind map in the SnapBooks app.

John de Graaf, David Wann, Thomas H. Naylor

Robin DiAngelo

Douglas Coop

Keith Payne