A fresh update tied to the Doomsday Clock is giving people another reason to pay attention, and the outlook is hardly reassuring.
For years, the symbolic clock has been used to reflect how close humanity may be to catastrophe, but the latest update has made it even more alarming.
In January 2026, the Bulletin of the Atomic Scientists moved the Clock to 85 seconds to midnight, the closest it has ever been to the point it represents as global disaster. The group said the decision reflected continuing risks from nuclear weapons, artificial intelligence, biological threats and climate change.
Now, a separate mathematical prediction about humanity’s long-term future has put the subject back in focus.
The theory, often referred to as the ‘doomsday argument,’ is a philosophical thought experiment rather than a proven prediction. It begins with an estimate that about 117 billion humans have lived so far. From there, it assumes people alive today occupy a random point in the overall timeline of our species, leading to the conclusion that those 117 billion people account for only five per cent of all humans who will ever live.
That would mean 95 per cent of humanity has yet to be born.
Using that logic, researchers scale the figure upward by multiplying the five per cent estimate by 20, since 100 per cent is 20 times larger than five per cent.
That pushes the projected total number of humans to 2.34 trillion before humanity reaches its endpoint.
Based on current assumptions about birth rates and population growth, the calculation suggests that process would take roughly 17,100 years, placing the end of humanity after those births have occurred.
Not everyone accepts that conclusion.
Critics argue the formula leaves out major unknowns, including breakthroughs such as space colonisation or technologies that could significantly extend human life and alter population trends. Others point out that the argument depends on a highly debatable assumption: that the current generation is randomly positioned in the full history of all humans who will ever exist.
There is also another forecast that paints a very different picture. A new study published in 2026 modelled what could happen if Earth’s carrying capacity suddenly dropped to around two billion people. In that deliberately conservative worst-case scenario, the researchers said the global population could halve by around the year 2064. The authors stressed that this was an illustrative scenario, not a prediction of what will actually happen.
Whether either projection proves accurate, both add to the growing sense that humanity’s future is becoming an increasingly uneasy subject.
£The most provocative part of our paper explores hypothetical future scenarios,” the researchers from the University of Milan said. “We modelled what could happen if major environmental crises abruptly imposed severe carrying–capacity limits on Earth. Under a deliberately conservative worst–case assumption that Earth’s sustainable carrying capacity suddenly dropped to around two billion people, our model predicts a rapid global population decline, with humanity potentially halving by around the year 2064.”
Whether either projection proves accurate, both add to the growing sense that humanity’s future is becoming an increasingly uneasy subject.