ScienceNot yet confirmed elsewhere1 publisher2 min readPublished
Lancet Commission names malicious AI and nuclear conflict as extinction-potential health threats
Lancet Commission experts modeled 17 global health threats through 2100 and rated two, malicious AI and nuclear conflict, as carrying extinction potential. Obesity leads on avoidable burden at 23.1 billion disability-adjusted life-years, the gap between best and worst case by 2100.
The Scientist · Science desk
Obesity's estimated avoidable burden, the gap between best- and worst-case scenarios by 2100: 23.1 billion DALYs. 15 catastrophic risks each carry more than 1 billion avoidable DALYs. Baseline forecast of total disease and injury burden, 2025 to 2100: an estimated 246 billion DALYs.
| Figure | Value | Note | Claim |
|---|---|---|---|
| Obesity: estimated avoidable burden by 2100 | 23.1 billion DALYs | 7 | |
| Catastrophic risks, each over 1 billion avoidable DALYs | 15 risks | after malicious AI, nuclear conflict | 4 |
| Estimated total burden, baseline forecast | 246 billion DALYs | disease and injury, 2025 to 2100 | 9 |
What happened
- The researchers modeled how much death and disability could be avoided for each threat between 2025 and 2100, counted in disability-adjusted life-years, or DALYs.
- Beyond the two extinction cases, 15 more threats each carry more than 1 billion potentially avoidable DALYs between now and 2100.
- Asteroid strikes and supervolcano eruptions were discounted because of their very low probability of occurring this century.
Why it matters
- constraint Each threat's burden was calculated on its own and overlaps in people who carry several risks, so the 17 estimates cannot be summed into one figure.
- decision Preparedness budgets have to weigh obesity's chronic gap against two threats the commission calls special cases of low probability.
- exposure None of the commission's estimates covers mirror life, if it were ever built.
The commission's reference unit is COVID-19, and the conversion is simple. One billion disability-adjusted life-years (DALYs) is equivalent to two pandemics, the researchers write [5], so one pandemic is 0.5 billion [18]. At that rate the obesity gap comes to 46 pandemics [7], and the 246 billion baseline for 2025 to 2100 comes to roughly 490, which the researchers round to 500 [9][20]. Obesity's gap is also about 23 times the 1-billion cutoff that put each of the 15 threats on the list [19].
Two cautions come with the units. For obesity, the figure is the difference between best- and worst-case scenarios by 2100 [7]. That bounds what is avoidable inside the model. It does not show how much of the gap any particular budget closes.
The education estimate also rests partly on demography. Higher educational attainment is projected to reduce disease burden both by improving health and by slowing population growth [8]. Some of the avoided burden therefore comes from there being fewer people to carry it.
Christopher JL Murray, a physician and health economist at the University of Washington who co-chairs the commission, framed the findings this way: "The striking finding is not only the scale of these threats, but that humanity still has the agency to act," he said [15][16]. A later remark is the better guide to reading the list. "Some are already imposing substantial health burdens today, while others carry a real danger if they materialize," Murray said [17].
In our view that sentence describes two kinds of entry. Many of the 15 are conditions already imposing burdens, such as smoking and air pollution [6]. DALY counts fit that kind well. The two extinction cases are rated low probability [3], and neither has a DALY figure in the coverage available.
The researchers also stress that the threats are interconnected, and that solving them calls for a long-term, multi-faceted approach that does not simply combat problems in isolation [13]. Their recommendations include building and funding threat-ready health systems and dramatically increasing investment in breakthrough innovation [14].
What to watch
- The full commission report, for the best- and worst-case scenario definitions behind each threat's avoidable-DALY gap.
- Any published DALY estimate for malicious AI or nuclear conflict, the two extinction-potential cases.
- Whether any government budget adopts the recommendation to build and fund threat-ready health systems.
Clarity's read
What the record supports and how the coverage leans. The claims behind it follow.
Reality
- Evidence55
- Adoption
- Insufficient
- Hype gap+20
- Incentives
- Insufficient
- Confidence50
Claim ledger
Ranked by verification strength, evidence, and original report placement.
- [1]
In an international assessment published in The Lancet, a team of dozens of scientific experts cataloged 17 major global health threats faced by humanity this century.
ReportedSupportedSource: The Lancet Commission on 21st Century Global Threats to Health, as reported by ScienceAlertView cited source - [2]
The researchers used modeling to estimate how much death and disability could potentially be avoided for each threat between 2025 and 2100, measured in disability-adjusted life-years (DALYs).
ReportedSupportedSource: Lancet Commission researchers, as reported by ScienceAlertView cited source - [3]
Two threats were rated as carrying 'extinction potential' for humanity between now and 2100, despite their ultimately low probability: malicious AI, including using AI to create new bioweapons, and nuclear conflict with nuclear famine.
ReportedSupportedSource: Lancet Commission researchers, in their report as quoted by ScienceAlertView cited source - [4]
After the special cases of malicious AI and nuclear conflict, the researchers identified 15 major catastrophic risks, each associated with more than 1 billion potentially avoidable DALYs between now and 2100.
ReportedSupportedSource: Lancet Commission researchers, as reported by ScienceAlertView cited source - [5]
'For reference, 1 billion DALYs is equivalent to two COVID-19 pandemics,' the researchers write.
- [6]
The 15 threats are air pollution, antimicrobial resistance, childhood malnutrition, climate change, the collapse of international aid funding for health, conventional armed conflict, high alcohol use, high blood pressure, income inequality, low educational attainment, naturally occurring pandemics, obesity, poor mental health, smoking, and unhealthy aging.
ReportedSupportedSource: Lancet Commission researchers, as reported by ScienceAlertView cited source - [7]
Obesity, including the effects of high BMI, poor diet and low physical activity, had the largest potentially avoidable burden among the 15, at an estimated 23.1 billion DALYs, about 46 COVID-19 pandemics, being the difference between the best- and worst-case scenarios by 2100.
ReportedSupportedSource: Lancet Commission researchers, as reported by ScienceAlertView cited source - [8]
After obesity, the largest potentially avoidable burdens were low educational attainment and income inequality, with higher rates of education projected to reduce the burden of disease both by improving people's health and slowing population growth.
ReportedSupportedSource: Lancet Commission researchers, as reported by ScienceAlertView cited source - [9]
Under the researchers' baseline forecast, the total global burden of disease and injury between 2025 and 2100 amounts to an estimated 246 billion DALYs, equivalent to roughly 500 COVID-19 pandemics.
ReportedSupportedSource: Lancet Commission researchers, as reported by ScienceAlertView cited source - [10]
Because the burden of each threat was calculated individually, the total burdens cannot be added together, as that would over-count the overlap in health problems faced by individuals.
- [11]
Other potentially extinction-level dangers, such as asteroid strikes or supervolcano eruptions, were discounted due to their very low probability of occurring this century.
ReportedSupportedSource: Lancet Commission researchers, as reported by ScienceAlertView cited source - [12]
The creation of 'mirror life', a hypothesized extinction-potential event, was left out because it has not yet been developed, and it is too early to quantify the theoretical dangers to human health.
ReportedSupportedSource: Lancet Commission researchers, as reported by ScienceAlertView cited source - [13]
The researchers emphasize that many of these health dangers are interconnected, and that solving them calls for a long-term and multi-faceted approach that does not simply combat individual problems in isolation.
ReportedSupportedSource: Lancet Commission researchers, as reported by ScienceAlertView cited source - [14]
The researchers make three key recommendations, calling for governments to build and fund threat-ready health systems and to dramatically increase investment in breakthrough innovation.
ReportedSupportedSource: Lancet Commission researchers, as reported by ScienceAlertView cited source - [15]
'The striking finding is not only the scale of these threats, but that humanity still has the agency to act,' said Christopher JL Murray.
ReportedSupportedSource: Christopher JL Murray, co-chair of the Lancet Commission, quoted by ScienceAlertView cited source - [16]
Christopher JL Murray is a physician and health economist at the University of Washington and co-chair of The Lancet Commission on 21st Century Global Threats to Health.
- [17]
'Some are already imposing substantial health burdens today, while others carry a real danger if they materialize,' said Murray.
ReportedSupportedSource: Christopher JL Murray, co-chair of the Lancet Commission, quoted by ScienceAlertView cited source - [18]
One COVID-19 pandemic equals about 0.5 billion DALYs on the commission's own yardstick.
- [19]
Obesity's avoidable burden is about 23 times the 1-billion-DALY threshold used to select the 15 threats.
- [20]
The 246 billion DALY baseline is roughly 490 pandemics at 0.5 billion DALYs each.
Sources
1 independent publisher whose own reporting we read for this story.
- sciencealert.comExperts Identified The Gravest Health Threats Facing Humanity – Two Have 'Extinction Potential'
1 article · October 12, 2026
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- The LancetFollow
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- University of WashingtonFollow
- Disability-adjusted life-year (DALY)Follow