Robert Sapolsky | Father-Offspring Interviews Robert Sapolsky | Father-Offspring Interviews

The Mystery of the Bladder; Falling Fertility Rates | Robert Sapolsky Father-Offspring Interviews

Oct 1, 2026 · 31m

Summary

Robert Sapolsky debunks the Malthusian overpopulation myth, explaining how global fertility rates have plummeted to replacement levels without predicted chaos, and discusses the economic consequences of aging populations. He also answers a listener's question on the evolutionary logic of bladders, covering predator avoidance, water retention, and the universal 21-second urination duration across mammals.

Topics discussed

Sponsor: Total Wine & More and Sustain Pro Introduction to Father Offspring Interviews The Malthusian Collapse Myth and Brooklyn Childhood Global Fertility Rates and Replacement Levels Failed Policy Interventions: Romania and South Korea Declining Fertility in the Developing World Causes of Decline: Cost, Pollution, and Antinatalism Sponsor: Total Wine & More and Sustain Pro Consequences: Aging Populations and Economic Collapse Paul Ehrlich, The Population Bomb, and His Legacy US Demographics and the Role of Immigration Listener Question: Evolutionary Logic of the Bladder Hypothesis: Bladders Prevent Predator Tracking Water Retention and Hibernating Bears Social Scent Marking and Voluntary Control Stress Responses and Bladder Emptying Kidney Adaptations in Camels and Whales The 21-Second Urination Rule and Ignobel Prize Human Bipedalism and Bladder Physiology Sponsor: End Family Fire and Apple Watch
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