AI Insight
The Doomsday Argument, originally proposed by philosopher Brandon Carter and later developed by John Leslie, uses Bayesian probability to suggest that humans are likely closer to the end of their existence as a species than commonly assumed. The reasoning holds that, treating yourself as a random observer among all humans who will ever live, there is roughly a 95 percent chance that you are not among the first five percent of all humans ever born, implying the total number of future humans is limited. Despite decades of scrutiny, no consensus refutation of the argument has been established, though critics challenge its underlying assumptions about self-sampling and prior probability distributions.
Why it matters
The argument, while not a predictive model in the empirical scientific sense, has implications for how humanity assesses existential risk and prioritizes long-term survival strategies. It has influenced academic discussions in philosophy, statistics, and existential risk research, including work at institutions studying global catastrophic risks.
This eerily simple math says our days are numbered—and nobody can agree why it’s wrong
Source: Can math predict the end of humanity? Inside the ‘doomsday argument’