A group of scientific experts has identified 17 catastrophic health risks that could reshape the human experience before 2100. The report highlights that while nuclear war and malicious AI present existential dangers, preventable conditions like obesity represent the largest avoidable burden on global health.
The 23.1 billion DALY burden of obesity and inequality
The most significant health crisis identified by the researchers is not a sudden catastrophe, but a slow-moving metabolic one. According to the report, obesity—driven by high-calorie diets and decreasing physical activity—is projected to cause an estimated 23.1 billion disability-adjusted life years (DALYs) of loss. This trend is currently rising in every country across the globe.
This metabolic crisis is compounded by systemic social issues. The study reported that income inequality is expected to result in an avoidable health burden equivalent to 25 COVID-19 pandemics by the end of the century, or roughly 13.8 billion DALYs. Furthermore, low educational attainment is flagged as a major driver of disease, suggesting that improvements in global schooling could significantly slow population growth and improve health outcomes.
The existential shadow of malicious AI and nuclear war
While lifestyle diseases claim the most years , two specific threats are categorized as having the potential to cause human extinction: nuclear conflict and the malicious use of artificial intelligence. The researchers noted that avoiding a nuclear war and its subsequent famine could save 133 million lives and 9.35 billion DALYs by 2100.
Artificial intelligence presents a different, more technological brand of danger. While AI holds immense potential for medical advancement, the report warns that bad actors could use it to design biological weapons or trigger the failure of critical societal infrastructure. Mitigating the risks associated with malicious AI could potentially avert 10.4 billion DALYs of human suffering.
Climate change and the 1.89 billion years of healthy life at risk
Environmental shifts remain a cornerstone of the report's findings, with climate chagne estimated to cost at least 1.89 billion years of healthy life. The researchers linked these losses to heat-related deaths, an increase in natural disasters, and the spread of diseases like malaria and dengue due to rising temperatures.
This environmental pressure interacts with other growing threats, such as antimicrobial resistance and childhood malnutrition. The report emphasizes that these dangers are deeply interconnected, meaning that a failure to address climate change will likely exacerbate the burden of existing health issues like infectious diseases and food insecurity.
Why asteroid strikes and mirror life were excluded from the modeling
The report's scope intentionallly leaves out certain high-profile existential risks to maintain statistical accuracy. For instance, the researchers did not include the possibility of asteroid strikes or supervolcano eruptions because the mathematical probability of such events occurring within the timeframe was deemed too low for the model.
Similarly, the theoretical danger of "mirror life" was omitted from the calculations. While the creation of such life forms could pose profound risks to human health, the authors noted it has not yet been developed, making it impossible to quantify the potential impact accurately at this stage. This leaves a significant gap in our understanding of how emerging biotechnologies might interact with the 17 identified threats.
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