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New Study: 2.7 Kids Needed to Avoid Extinction

5/2/2025

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Summary

Story summary

Japanese and Filipino researchers have revealed a startling new threshold: human populations require at least 2.7 children per woman to stave off extinction, up from the previous 2.1. This increase reflects the unpredictability of births and mortality rates. With many developed nations falling short, the future of family legacies and cultural heritage hangs in the balance.

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Story summary

Japanese and Filipino researchers have revealed a startling new threshold: human populations require at least 2.7 children per woman to stave off extinction, up from the previous 2.1. This increase reflects the unpredictability of births and mortality rates. With many developed nations falling short, the future of family legacies and cultural heritage hangs in the balance.