Six moments. Thousands of years. One enduring question: how do we judge a warning about the future?
Open each entry to explore the claim, the evidence and what followed. These examples have different purposes: literary prophecy, religious belief, failed predictions and scientific warnings should be examined on their own terms.
c. 2025–1700 BCE — Neferty: chaos followed by a promised ruler
Literary prophecy
The story or warning
An Egyptian priest describes disorder and a future king who will restore the country. This is a story about Egypt’s political order, rather than the destruction of the planet.
What the evidence says
UCL dates the composition probably to the Middle Kingdom, although it is set centuries earlier at Sneferu’s court. Exact authorship and composition date are not recorded in surviving sources.
What followed—and what remains uncertain
The earlier setting can make a later political story sound like foresight. Its praise of Ameny is most plausibly associated with Amenemhat I, but the identification is not completely certain.
A question to carry forward: Was the prediction written before the events, or presented afterwards as prophecy?
1450–1474 CE — The Apocalypse becomes a picture book
Religious imagery
The story or warning
Revelation’s visions of judgement and renewal were retold through dramatic images. A surviving German manuscript illustrates the horsemen, destruction, judgement and the New Jerusalem.
What the evidence says
The British Library dates this particular Apocalypse Picture Book to the third quarter of the fifteenth century. That is the date of this manuscript, not the date when Revelation was originally composed.
What followed—and what remains uncertain
The manuscript documents how an apocalyptic text was transmitted and visualised. It does not establish that its imagery predicted a particular modern event. Religious interpretations of Revelation differ.
A question to carry forward: Are we reading a historical text in its context, or matching its symbols to today’s headlines?
22 October 1844 — The Great Disappointment
Failed date prediction
The story or warning
Followers of the Millerite movement expected Christ’s return. The date of 22 October 1844 became central to that expectation.
What the evidence says
The National Museum of American Religion describes the expectation, its failure and the subsequent responses within the movement.
What followed—and what remains uncertain
The anticipated return did not occur on that date. Some followers left; others retained or reinterpreted their beliefs. A failed timetable and a person’s broader religious faith are distinct questions.
A question to carry forward: If an announced date passes, what would count as admitting that the prediction failed?
Source: National Museum of American Religion: the 1844 disappointment
1947 — The Doomsday Clock begins
Symbolic risk warning
The story or warning
A clock approaching midnight communicates the urgency of threats humanity creates. It began amid concern about nuclear weapons.
What the evidence says
The Bulletin of the Atomic Scientists explains that the Clock debuted in 1947. It is a metaphor informed by expert assessment, not a tool forecasting when the world will end.
What followed—and what remains uncertain
Its hands can move in either direction as the assessment changes. The Clock’s continuing existence does not make it a failed deadline: no literal countdown was promised.
A question to carry forward: Is this a prediction with a date, or a warning intended to encourage action?
21 December 2012 — A calendar boundary becomes a doomsday story
Unsupported catastrophe claim
The story or warning
Modern claims linked a Maya calendar cycle to the end of the world and supposed astronomical disasters. Those claims should not be treated as the beliefs of all Maya people.
What the evidence says
NASA’s JPL explained before 2012 that a Long Count period ending was not the calendar ceasing to exist. It also rejected the claimed evidence for a threatening “Nibiru” object.
What followed—and what remains uncertain
The advertised global catastrophe did not happen on that date. A calendar transition provided no scientific mechanism for one.
A question to carry forward: What connects the date to a real physical cause—and can the claimed object or effect be observed?
Today — Climate risk: evidence and choices
Evidence-based warning
The story or warning
Human-driven warming changes the conditions on which societies depend. This is a measurable environmental problem, rather than a prediction of one universal doomsday date.
What the evidence says
NASA brings together evidence from temperature records, ocean warming, ice loss and sea-level rise. Multiple observations support the conclusion that the planet is warming.
What followed—and what remains uncertain
There is no single date when all consequences arrive. Future risks depend on the amount of warming, exposure, adaptation and decisions about emissions. Uncertainty about details does not erase the underlying evidence.
A question to carry forward: What has been measured, what is projected, and which actions can reduce the risk?
Warnings are an invitation to think
A dramatic story can reveal the anxieties of its time without predicting ours. A precise date can be tested. An evidence-based warning can help prevent the very outcome it describes.
Ask who made the claim, when it was recorded, what would disprove it and whether our choices can change the outcome. Fear alone is not evidence; neither is a past false alarm proof that every future danger is imaginary.
A selective timeline, not a complete history or a ranking of religions. Ancient dates are approximate. Sources reviewed on 8 October 2026.