Global Fertility Decline Linked to Smartphones and Social Isolation, With AI Potentially Accelerating the Trend

Worldwide fertility has dropped below the 2.1 births-per-woman threshold needed to prevent population decline, with more than two-thirds of nations now below replacement level. Unlike earlier decades when the decline was driven by couples choosing smaller families, the current phase is characterized by fewer people forming couples or having sex at all. Journalists and social scientists, including John Burn-Murdoch and Alice Evans, have argued that mass smartphone adoption during the 2010s correlates closely with the global rise in singledom, as personalized digital entertainment reduced the need for in-person socializing and eroded social skill development. The emergence of AI chatbots and companion apps since 2022 has introduced a new variable: tools capable of providing emotional support and conversation previously only available through human relationships. Critics and researchers warn that future, more immersive AI products could intensify social withdrawal further. The long-term demographic consequences, including shrinking workforces and aging populations, are projected to be severe, with some models suggesting dramatic population collapses in countries like Thailand within two centuries if current trends persist.