The Doomsday Clock, a symbolic measure of humanity’s proximity to global catastrophe, remains set at 90 seconds to midnight, the closest it has ever been to the point representing irreversible disaster. Maintained by the Bulletin of the Atomic Scientists, the clock reflects the collective judgement of leading scientists, security experts and Nobel laureates on the state of existential threats facing the world.

First unveiled in 1947, the Doomsday Clock was conceived by scientists who had worked on the Manhattan Project and later became deeply concerned about the consequences of nuclear weapons. What began as a warning about atomic warfare has since evolved into a broader indicator that incorporates multiple human-driven risks, including nuclear conflict, climate change, biological threats, disruptive technologies and geopolitical instability.

Midnight on the clock does not represent a specific event or date. Instead, it symbolises a threshold beyond which civilisation could face irreversible damage. The clock’s movement toward or away from midnight is recalibrated periodically based on global developments, policy decisions and emerging scientific assessments.

Why the Clock Is Still at 90 Seconds

The decision to keep the Doomsday Clock at 90 seconds to midnight reflects the Bulletin’s view that the global risk environment remains exceptionally dangerous, with no meaningful improvement across major threat categories.

At the centre of this assessment lies the continued risk of nuclear confrontation. More than three decades after the end of the Cold War, nuclear weapons remain deeply embedded in global security doctrines. Approximately 12,000 nuclear warheads exist worldwide, many on high alert. The erosion of arms control frameworks, combined with heightened geopolitical tensions, has increased the risk of miscalculation, misunderstanding or unintended escalation.

The ongoing conflict in Ukraine, now entering a prolonged phase with no clear resolution, has brought nuclear rhetoric back into mainstream strategic discourse. Relations between nuclear-armed states have grown more confrontational, while communication channels that once helped manage crises have weakened. Experts warn that even a limited nuclear exchange would have catastrophic humanitarian, environmental and economic consequences far beyond national borders.

Climate Change as a Risk Multiplier

Climate change is another central reason for the clock’s position. Scientists associated with the Bulletin consistently describe climate disruption as a threat multiplier, exacerbating existing political, economic and social stresses. Rising global temperatures, intensifying extreme weather events, melting glaciers and sea-level rise are no longer future projections but present realities.

Despite international agreements and climate pledges, global greenhouse gas emissions continue at levels incompatible with limiting warming to safer thresholds. The failure to translate commitments into action has raised concerns that climate impacts could trigger large-scale displacement, food insecurity and conflict, further destabilising fragile regions.

The Bulletin has emphasised that climate risks intersect with nuclear and geopolitical dangers, creating complex feedback loops that make crises harder to manage and resolve.

Biological Risks and Global Health Vulnerabilities

The COVID-19 pandemic reshaped global thinking around biological threats, exposing weaknesses in health systems, international coordination and crisis response mechanisms. While the immediate emergency has passed, experts caution that the world remains underprepared for future pandemics.

Advances in biotechnology, while offering immense benefits, also raise concerns about accidental releases, laboratory safety and the potential misuse of biological agents. The Bulletin notes that insufficient global governance in this area increases the likelihood that biological risks could escalate rapidly before adequate countermeasures are deployed.

Technology, AI and Unintended Consequences

Emerging technologies, particularly artificial intelligence, have become an increasingly important factor in the Doomsday Clock’s assessment. Rapid advances in AI, autonomous systems and cyber capabilities are transforming economies and militaries alike, often faster than regulatory or ethical frameworks can adapt.

Of particular concern is the integration of AI into military decision-making systems, where reduced human oversight could increase the risk of unintended escalation during crises. The spread of AI-driven misinformation and deepfake technologies has also undermined trust in institutions, media and democratic processes, contributing to political polarisation and instability.

The Bulletin has warned that technological innovation without adequate safeguards could amplify existing threats rather than mitigate them.

The Role of Geopolitics and Global Fragmentation

A defining feature of the current era is the fragmentation of global cooperation. Multilateral institutions face growing pressure, while geopolitical rivalries increasingly shape international engagement. Trade disputes, sanctions regimes and strategic competition have narrowed the space for collective problem-solving.

The Doomsday Clock reflects this reality by highlighting not just the presence of risks, but the absence of effective global responses. According to the Bulletin, many of today’s dangers are exacerbated by mistrust between states and the prioritisation of short-term national interests over long-term global stability.

A Warning, Not a Prediction

Crucially, the Bulletin of the Atomic Scientists stresses that the Doomsday Clock is not a forecast of inevitable disaster. Rather, it is a warning signal intended to prompt reflection, debate and action. The clock’s hands have moved away from midnight in the past, most notably after the Cold War, demonstrating that political choices and international cooperation can reduce existential risk.

The current setting at 90 seconds to midnight is meant to convey urgency. It reflects a judgement that humanity is operating with a dangerously narrow margin for error — but not that catastrophe is unavoidable.

Why the Doomsday Clock Still Matters Today

In an era of constant news cycles and competing crises, the Doomsday Clock endures because it offers a unified framework for understanding global risk. It reminds policymakers and the public alike that nuclear weapons, climate change, pandemics and disruptive technologies are interconnected challenges requiring coordinated responses.

The Bulletin argues that humanity possesses the knowledge and resources needed to address these threats. What remains uncertain is whether there is sufficient political will to act decisively and collectively before risks escalate further.

As the world navigates an increasingly complex and volatile landscape, the Doomsday Clock’s position serves as both a mirror and a message — reflecting the consequences of current choices and urging leaders to recognise that the future is still shaped by decisions made today.