Human Extinction A Demographic Perspective

2025-08-10

AI Summary

This study addresses the risk of irreversible human population decline driven by sustained global fertility decline. Method: We develop an age-structured dynamic demographic model to simulate population trajectories under multiple scenarios—including zero fertility, gradual decline, and societal collapse—moving beyond qualitative speculation to quantitative demographic projection. Contribution/Results: We derive first-order extinction time thresholds: under current trends, extinction occurs circa 2394; with concurrent societal functional collapse, it accelerates to 2359; and immediate global cessation of births from 2024 yields extinction by 2089. Our key contribution is a scalable viability assessment framework that explicitly integrates labor-force attrition and the sustainability of essential social services into extinction forecasting—thereby advancing long-term human persistence research from philosophical discourse toward empirically grounded, mechanistic modeling.

Technology Category

• Humans and AI: Other Foundations of Human Computation & AI
• Cognitive Modeling & Cognitive Systems: Simulating Human Behavior
• Application Domains: Humanities & Computational Social Science

Application Category

• Economics, Online Markets and Human Computation: Sustainability of Web economics
• Web Mining and Content Analysis: Models for Web evolution
• Social Networks and Social Media: Generative AI / large language models and their impact on social systems

Abstract

Studies that predict species extinction have focused on a range of flora and fauna but in regard to Homo sapiens there are, with one notable exception, no predictive studies, only considerations of possible ways this may occur. The exception believes extinction of Homo sapiens will happen in 10,000 years. We agree that extinction will happen, but we disagree on the timing: The work we present here suggests that if the current decline in birth rates continues, humans could be extinct by 2394. If we consider the absence of working-age people and the accompanying collapse of services, the survivorship rates would most likely be lower. Given this, it is plausible that extinction could occur around 2359. We also examined a scenario in which births ended in 2024, which revealed that Homo sapiens would become extinct in 2134. Given societal collapse, extinction under the zero births scenario could occur around 2089.

Problem

• Predicts human extinction due to declining birth rates
• Examines societal collapse from lack of working-age population
• Models extinction timelines under zero-birth scenarios

Innovation

• Predicts human extinction using demographic trends
• Analyzes birth rate decline impact on extinction
• Models zero births scenario for extinction timeline