A comprehensive study published in the prominent medical journal The Lancet warns that severe existential risks, particularly the use of nuclear weapons and the weaponization of artificial intelligence, could lead to human extinction by 2100. Researchers analyzed more than 300 potential threats to global populations, classifying them into four major categories.
Top Existential Threats to Human Survival
Seventeen existential risks categorized within the most critical groups possess the potential to eradicate the human species. At the summit of this risk pyramid are nuclear warfare—which would trigger a devastating nuclear winter and catastrophic global famine—and the malicious exploitation of artificial intelligence, notably in the synthesis and engineering of advanced biological weapons.
Secondary Threats Endangering Over One Billion Lives
The second category covers major hazards that, while falling short of total extinction, could cause the collective loss of more than one billion healthy human life-years by 2100. These critical threats include ambient air pollution, antimicrobial resistance, childhood undernutrition, climate change, the cessation of international healthcare assistance, conventional military conflicts, excessive alcohol consumption, and chronic hypertension.
Furthermore, socioeconomic and systemic vulnerabilities such as income inequality, low educational attainment, natural pandemics, obesity, mental health conditions, tobacco use, and unhealthy ageing exacerbate these global risks.
Preparedness and Health Infrastructure Recommendations
The study’s authors urge nations across the globe to build and adequately fund resilient public health architectures capable of anticipating, mitigating, and responding to evolving crises. Recommended initiatives include creating dedicated government oversight units, embedding emergency preparedness into national budget planning, and strengthening proactive epidemiological surveillance systems with special priority given to vulnerable communities.
