All scenarios / Biological
Children of Men
Humanity simply… stops making more humans.
What it is
In Children of Men, humanity simply stops being able to have children. In reality there's no sign of sudden mass infertility. What's actually happening is that birth rates are falling as people choose smaller families, live in cities and get more education.
Why it ranks where it does
A major Lancet study projects that the global fertility rate will fall from 2.23 children per woman in 2021 to 1.83 in 2050 and 1.59 in 2100. By 2100, 97% of countries would be below the replacement level of about 2.1. That will reshape economies, pensions and politics, but it points to an ageing, shrinking population rather than extinction.
Evidence on the board
- Birth rates are falling worldwide, but that means shrinking populations, not literal extinction.
What the experts say
Demographers mostly see low fertility as an economic and social challenge. Populations shrinking over centuries is a very different thing from the sudden sterility shown in the film. We include a small score for the real trend, while the Hollywood version scores close to zero.
The movie vs. reality
In Children of Men (2006), based on P.D. James's 1992 novel, no child has been born for 18 years, and the world falls into despair and authoritarianism. Some scientists have debated whether sperm counts are falling in some regions, but the evidence is contested and nowhere near sterility. The real driver of falling birth rates is choice: the cost of housing and childcare, later marriage, and wider access to education and contraception. That's a policy challenge, not a biological countdown.
What would move the number
Up
- Evidence of a biological decline in fertility, rather than a choice-driven one
- Fertility falling faster than projected in large countries
Down
- Pro-family policies that measurably raise birth rates
- Fertility stabilizing in high-income countries
Live signals we track
The baseline above is set from the evidence as of October 13, 2026. On the live board, your browser adjusts it in real time using these feeds. Chatter can only nudge a score in proportion to its evidence, so attention alone can't make an unlikely scenario look likely.
- Public attention: daily Wikipedia pageviews for Sub-replacement fertility
- Online chatter: Hacker News stories mentioning "birth rate" this week vs. the prior eight weeks
Sources
- The Lancet: GBD 2021 fertility forecasts
https://www.thelancet.com/journals/lancet/article/PIIS0140-6736(24)00550-6/fulltext - IHME news release on fertility declines
https://www.healthdata.org/news-events/newsroom/news-releases/lancet-dramatic-declines-global-fertility-rates-set-transform
Baseline scores are an editorial threat index from 0 to 100 that combines current reporting with published expert estimates. They're meant for comparing risks, not as actuarial forecasts. See how the numbers work.