Smartphones and the Global Fertility Crash: An Unexpected Link

Birthrates are collapsing across the developed world, with numbers that unsettle demographers; according to the United Nations, nearly three-quarters of humanity already live in countries with fertility levels below replacement. A 2024 forecast from The Lancet predicts that 97% of countries will fall below fertility replacement by 2100, a demographic inversion without historical precedent.

These declines imply shrinking workforces, depleted pension funds, increasingly isolated older adults, and a worsening of the politics around immigration, often seen as the only realistic remedy in Western societies. Familiar forces have been blamed: delayed parenthood, wider access to contraception, the rising cost of childrearing, and existential angst that spans climate change, war resurgence, and how AI will transform the future.

The smartphone has become the closest relationship many people have, the last thing they touch before falling asleep and the first thing they reach for upon waking up. According to a survey by the American Academy of Sleep Medicine, 87% of Americans regularly sleep with their smartphones in the bedroom.

The device has colonized that most personal of spaces, turning the bed into a workstation and turning notifications, likes, shares, and algorithmically curated content into a preferred source of dopamine hits. As a result, many couples spend their time side by side in distinct digital bubbles. More than a distraction, this is a kind of fetishistic displacement that redirects desire.

The smartphone is the portal to many potentially problematic behaviors, from social media overuse to those related to gaming, shopping, gambling, and pornography. In one survey of adults under 40, 16% of men reported viewing pornography at least once daily. What they are consuming is not simply sexual content, but a hyper-stimulating simulation thereof, designed to maximize arousal through exaggeration and novelty.

A study that analyzed 3,419 men aged 18 to 35, revealed that 21% had some level of erectile dysfunction during partnered sex, and higher pornography consumption was significantly correlated with erectile dysfunction, even after adjusting for confounders.

A study of Tinder, the world’s most popular dating app, suggests that about half of users are not seeking offline dates. The interpretation is that many use the app for validation, ego boosts, and distraction, in other words, like any social media platform and not as a pathway to real relationships, let alone family formation.

The rise of AI companions may exacerbate the problem. Platforms such as Replika and Character.ai allow users to form emotionally rich, undemanding relationships with artificial partners. These systems are designed to be 'perfect', micro-tuned to meet one’s every last taste, and never disappoint. 40% of Replika users in 2023 were engaging in romantic partnerships with their bots.

The decline in birthrates is not merely a policy problem; it is a symptom of a digital culture that successfully competes with human connection. By displacing partners, rechanneling desire, and offering the illusion of perfected, commitment-free companionship, we are eroding the foundations of partnership and child-rearing.

To address the crisis, we must also recognize that an insidious competitor to the next generation may be the glowing rectangle in our hands. Elias Aboujaoude, a clinical professor, researcher, and writer at Stanford University’s Department of Psychiatry, where he is chief of the Anxiety Disorders Section and director of the OCD Clinic and the Impulse Control Disorders Clinic.