Jonathan Haidt's recent book, "The Anxious Generation: How the Great Rewiring of Childhood Is Causing an Epidemic of Mental Illness," posits that the drastic increase in anxiety, depression, and self-harm among adolescents since the early 2010s can be directly attributed to the shift from a play-based childhood to a phone-based one. Haidt highlights that mental health statistics for young people, which were stable or even improving from the late 1990s until around 2010-2011, began to skyrocket specifically between 2012 and 2013. This trend was observed not only in the United States but also in Canada, the UK, Australia, New Zealand, and much of Northern Europe, suggesting a widespread, common cause rather than isolated incidents.
The core of Haidt's argument is that the widespread adoption of smartphones with high-speed internet and social media platforms like Instagram by 2015 fundamentally altered adolescent development. He notes that in 2010, many young people used flip phones as tools for communication, but by 2015, they carried the entire internet in their pockets. This change led to a significant increase in screen time, with many children spending five to ten hours a day on their devices, effectively displacing other activities crucial for development such as in-person social interaction, free play, and academic engagement. Academic achievement has also reportedly declined since 2012, coinciding with this shift.
The mental health crisis described is substantial: the percentage of U.S. teens reporting a major depressive episode increased by over 150% since 2010, with significant rises in diagnosed anxiety and depression among undergraduates. Emergency room visits for self-harm among girls aged 10-14 surged by 188%, and suicides in the same group rose by 167%. For boys aged 10-14, ER visits for self-harm increased by 48% and suicides by 91%. Haidt argues that this phenomenon is a result of a combination of "overprotection in the real world and underprotection in the virtual world," where children lack independence offline but are exposed to unregulated online environments.
Haidt proposes solutions to mitigate these issues, including no smartphones before age 14 and no social media until 16, advocating for a return to more independence and free play in the real world. He points out that the current Gen Z, now around 28, exhibits higher anxiety and fragility, posing challenges for employers. Haidt also suggests a decline in innovation, noting the absence of major Silicon Valley figures under 30 for the first time since the 1960s or 70s. While Haidt's thesis is compelling and supported by numerous statistics, some researchers, such as psychologist Candice Odgers, caution that most data are correlational, suggesting that while the problem coincided with smartphone adoption, a direct causal link has not been definitively proven.
