Key Takeaways Heinz von Foerster’s 1960 population model predicted humanity would reach infinity on Nov. 13, 2026. With 8.3 billion people in 2025, UN estimates expose how the old model missed major demographic shifts. The UN now expects population to peak near 10 billion in the 2080s, challenging old forecasts and AI models. A 1960 population model pegged Nov. 13, 2026 as “doomsday,” a date stamped with the false confidence of tidy math. Heinz von Foerster and his students published the projection in Science, extending exponential growth curves until the number of humans effectively hit infinity. With the calendar now …