Imagine waking up one morning and realizing the sun looks wrong.
Not gone.
Not hidden behind an ordinary layer of clouds.
Just…wrong.
The light is there, but it doesn’t seem to have the strength it should. Days pass, and whatever is happening doesn’t go away. The sun keeps rising, but its brightness doesn’t fully return.
Then the weather starts behaving strangely too.
The seasons don’t feel right.
Temperatures drop when they shouldn’t.
Crops struggle.
And nobody has any idea why.
That was the world Procopius of Caesarea was looking at in 536.
Procopius was a Byzantine historian living during the reign of Emperor Justinian. While writing about the wars of his own time, he stopped long enough to record something happening above everybody’s heads.
The sun had changed.
He described it as giving off light without its usual brightness, almost like the sun during an eclipse.
Except an eclipse ends.
This didn’t.
The strange dimness lasted for months.
And Procopius wasn’t sitting fifteen hundred years later with ice-core data, temperature reconstructions and a team of volcanologists trying to figure out what had happened.
He was there.
Looking up.
Whatever was blocking or scattering that sunlight was invisible to him as a cause. There was no weather satellite to pull up. No global monitoring network. No news report explaining that something enormous had happened somewhere else on the planet.
As far as the people underneath that strange sky were concerned, the sun had simply stopped behaving like the sun.
And Procopius wasn’t the only person who noticed.
In Italy, the Roman statesman Cassiodorus described a world that seemed slightly broken.
The sun appeared weak.
Shadows were diminished.
The moon seemed strange.
The seasons weren’t behaving the way people expected them to.
These weren’t two men sitting next to each other comparing notes. They were describing what they saw from different places around the Mediterranean.
Something had happened.
They just couldn’t see the source of it.
We can.
Well…
Sort of.
Because almost fifteen hundred years later, scientists found part of the answer buried in places Procopius and Cassiodorus could never have imagined.
Inside glaciers.
Inside tree trunks.
Inside layers of ice that had been quietly keeping records the entire time.
And that is where this story gets really fucking interesting.
Welcome to History After Dark.
The kind of history that didn’t quite make it into your textbooks.
If you’ve ever stumbled across the year 536 online, there’s a decent chance you’ve seen it introduced with some version of the same claim:
536 was the worst year in human history.
Which is a hell of a title to give a year.
We have had wars.
Pandemics.
Famines.
Genocides.
Natural disasters.
Entire cities destroyed.
So naturally, when I kept seeing one random year from the sixth century being handed the trophy for Worst Year to Be Alive, I had questions.
What happened in 536 that was supposedly bad enough to beat all of that?
And, more importantly:
Do we actually know it happened?
Because the popular version of this story gets dramatic very quickly.
A giant volcano erupts.
The world goes dark.
Temperatures crash.
Crops fail.
People starve.
Civilizations struggle.
Then plague arrives.
Congratulations.
Worst year ever.
Except history is almost never that cooperative.
The farther I followed this one, the messier it became.
We still don’t know for certain which volcano caused the initial atmospheric disturbance. More major volcanic events followed. Not every place experienced exactly the same conditions. Not every famine, war, migration or political change afterward can be dropped at the feet of a volcano.
And the Justinianic Plague didn’t even begin in 536.
So no, I’m not going to tell you that one mystery volcano erupted and immediately broke civilization.
The actual story is better than that anyway.
Because whatever happened around 536 left evidence in places separated by thousands of miles.
Some of it was written down by people.
Some of it grew inside trees.
And some of it fell as snow.
When the Sun Lost Its Light
Procopius gives us one of the most famous descriptions of 536, but Cassiodorus helps show us that the strange sky wasn’t simply one writer being dramatic.
His description from Italy includes a weakened sun and seasons that seemed confused.
That last part matters.
A dim sun is unsettling.
A failed growing season can kill you.
People in the sixth century depended on seasonal patterns in ways that most of us can comfortably ignore now. If summer is unusually cold in 2026, I might complain about it.
I’m still going to the grocery store.
For agricultural communities in the sixth century, a badly disrupted growing season was something entirely different.
And eventually, other records begin giving us glimpses of what food shortages looked like.
In Ireland, medieval annals preserve two brutally short notices from the late 530s:
“Failure of bread.”
That’s it.
Three words.
And somehow I think they’re more effective because of it.
There’s no dramatic description of starving families. No paragraph about fields. No explanation of what caused the shortage.
Just:
Failure of bread.
The Irish annals do need to be handled carefully. The surviving texts were compiled and transmitted after the events they describe, so I’m not going to pretend somebody sat down in Ireland in 536 and wrote those exact words while staring at a failed harvest.
But the notices preserve a record of serious food shortages during the same broader period in which other evidence tells us growing conditions had become unusually bad.
And Ireland wasn’t the only place recording strange conditions.
Historical records from China preserve reports from around the same period involving abnormal cold, frost, snow, drought, crop failures and famine.
You’ll sometimes see those records summarized online as something like:
“It snowed in China during the summer.”
Which sounds appropriately apocalyptic.
The actual evidence is more complicated.
China is enormous. The reports come from different regions and different moments, and they shouldn’t all be blended together into one giant weather report for an entire country.
There are also descriptions of yellow dust or material falling from the sky around this period.
And before we decide we have found volcanic ash raining over China—
we haven’t.
It might be related to atmospheric disturbances.
It might be dust.
Individual reports have to be considered in their own geographic and historical context.
This is one of those places where 536 gets more dramatic every time somebody retells it.
But we don’t need to exaggerate what the Chinese records say.
Abnormal cold.
Frost.
Snow.
Drought.
Crop failure.
Famine.
That’s plenty.
By this point, we have people in widely separated places leaving behind descriptions of a world that wasn’t behaving normally.
But written records can only take us so far.
The people recording these events could tell us what they saw.
They couldn’t tell us what was happening in the atmosphere.
For that, we have to stop reading documents for a minute.
And start reading trees.
The Trees Remembered
This might be my favorite part of the entire 536 rabbit hole.
Because historical documents are messy.
People exaggerate.
People misunderstand things.
Writers have agendas.
Documents disappear.
Copies get changed.
Dates get confused.
Sometimes you spend an unreasonable amount of time chasing one sentence backward through three languages only to discover that the original source apparently fell into a historical black hole.
If you read the last History After Dark, you already know how I feel about that.
Trees, thankfully, are significantly less annoying.
Every year, a tree adds another layer of growth.
The amount and characteristics of that growth can preserve information about the conditions the tree experienced. Good growing conditions can produce stronger growth. Bad growing conditions leave their own signature.
And trees that were alive during the sixth century recorded something.
Researchers studying long tree-ring chronologies from places including the European Alps and the Altai region found evidence of exceptionally poor growing conditions beginning around 536.
The summers had become unusually cold.
Then came more cooling.
The year 536 wasn’t standing alone.
Another major volcanic event followed only a few years later, around 540.
That changed the story considerably.
Because suddenly we weren’t looking at one terrible summer caused by one mysterious eruption.
We were looking at repeated climatic shocks.
Researchers have used the term Late Antique Little Ice Age for a longer period of cooling beginning in the sixth century and continuing, with variation, for generations.
And before we turn that into “the entire Northern Hemisphere froze for a century”—
no.
Climate doesn’t work that neatly.
The effects varied by region, and the term itself is part of a modern scientific interpretation of a complicated climatic period.
But the tree rings give us something the written sources can’t.
Physical evidence that growing conditions really did deteriorate dramatically around the same time people were writing about strange skies, abnormal seasons and food shortages.
And then scientists went looking in the ice.
The Ice Kept Receipts
Snow falls.
Another layer falls on top of it.
Then another.
And another.
Under the right conditions, those layers become compressed into ice.
Year after year.
Century after century.
And trapped inside them are traces of the atmosphere that existed when that snow fell.
Scientists can drill deep into ice sheets and glaciers and pull out cores containing layer after layer of environmental history.
Which is already cool as hell.
But for our purposes, the important thing hiding inside sixth-century ice is volcanic sulfate.
Major volcanic eruptions can blast sulfur-containing gases high into the atmosphere. Those gases can form sulfate aerosols capable of spreading over enormous distances and reflecting incoming sunlight.
Eventually, some of that sulfate returns to the surface.
Some of it lands on ice.
Then more snow covers it.
And nearly fifteen hundred years later, somebody drills it back out.
Research comparing Greenland and Antarctic ice cores with tree-ring records has identified major volcanic aerosol events corresponding with the severe climatic disturbances beginning around 536.
And this is where we finally get a physical explanation for that strange sun.
Procopius couldn’t see volcanic sulfate.
He could see what it did to the light.
Aerosols high in the atmosphere can reduce the amount of sunlight reaching the surface. Suddenly, a description of a sun shining without its usual brightness doesn’t sound quite so mysterious.
Even better—or worse, depending on whether you’re a sixth-century farmer—the ice shows that this wasn’t over after the first event.
Another major volcanic eruption followed around 540, delivering another climatic hit before conditions had fully recovered.
One disaster had apparently arrived with a sequel.
But there’s still a fairly enormous question sitting in the middle of all this.
Which volcano did it?
We don’t know.
There have been attempts to connect microscopic volcanic material preserved in ice with particular volcanic regions, including Iceland, but the source of the initial 536 eruption has not been settled.
And I actually love that we don’t know.
Not because I enjoy researchers suffering.
But because there’s something bizarre about an eruption powerful enough to affect climate across huge portions of the Northern Hemisphere while the volcano responsible can still basically sit there fifteen hundred years later going:
Prove it was me.
We have evidence of the eruption’s effects in ice.
We have the cooling in trees.
We have people describing what happened to the sky.
But the exact source?
Still being investigated.
History gave us the crime scene.
The culprit didn’t leave a signed confession.
So…How Bad Did It Get?
Bad.
That’s the easy answer.
The harder answer is that it depended on where you lived.
Modern climate reconstructions indicate exceptionally cold summers across parts of the Northern Hemisphere beginning in 536. Some research has reconstructed summer cooling in affected regions on the order of roughly 1.5 to 2.5°C.
That might not sound terrifying.
A couple of degrees?
Okay.
Except we’re talking about average seasonal temperatures across large regions, not whether you needed a hoodie one afternoon.
Plants care.
Growing seasons care.
Harvests care.
And when the cold arrives suddenly enough and lasts long enough, people care very quickly too.
Reduced sunlight and lower temperatures can interfere with plant growth. Frost at the wrong time can damage crops. A shortened growing season can mean less food.
And if another major eruption happens before agricultural systems have fully recovered?
Now you’re stacking problems.
Historical records preserve evidence of food shortages and famine in multiple regions during the broader sixth-century downturn.
But this is also where I want to be careful.
We cannot look at every bad thing that happened after 536 and write:
VOLCANO DID IT.
Climate can put pressure on societies.
Crop failure can contribute to hunger.
Hunger can make already vulnerable populations more vulnerable.
Environmental stress can interact with warfare, politics, trade, migration, disease and about a thousand other things human beings are already doing to one another.
But interaction isn’t the same thing as a single cause.
Which brings us to the disaster that almost always gets attached to this story.
The plague.
And Then Came the Plague
A few years after the strange sun appeared, plague reached the Mediterranean world.
The Justinianic Plague began in the 540s and became the first historically documented plague pandemic.
And if you’re trying to write the most dramatic version of 536 possible, this is almost too convenient.
Volcano.
Darkness.
Cold.
Famine.
Plague.
Done.
Apocalypse.
Except we don’t get to do that.
The plague did not begin in 536, and the fact that it appeared several years after the climatic downturn began does not prove that one caused the other.
Researchers have investigated possible relationships between climate, ecology and plague transmission, and the environmental disruptions of the sixth century form part of the world in which the pandemic emerged.
But there is a very large difference between saying:
the plague emerged during a period already experiencing serious climatic disruption
and saying:
the volcano caused the plague.
The first is chronology.
The second is causation.
And history gets into trouble when we pretend those are interchangeable.
The same caution applies to political upheaval, migration and social change.
The sixth century was difficult for a lot of people for a lot of reasons.
Climate was one of them.
It doesn’t have to be the explanation for everything.
So before we decide whether 536 deserves the title it has been given, we need to separate the things the evidence actually tells us from the things we still can’t answer.
What We Know
Something extraordinary happened to the atmosphere around 536.
People in the Mediterranean described a weakened sun and abnormal seasons. Irish annals preserve evidence of serious food shortages during the broader period, while Chinese historical traditions record episodes of abnormal cold, frost, snow, drought, crop failure and famine.
Those written records are supported by something the people creating them knew nothing about.
Tree-ring evidence shows severe cooling and poor growing conditions beginning around this time, while polar ice preserves volcanic sulfate from major eruptions capable of producing large-scale atmospheric cooling.
And the initial disturbance wasn’t the end of it.
Another major eruption followed around 540, contributing to further cooling before conditions had fully recovered.
536 wasn’t simply one weird year.
It was the beginning of a much longer climatic disturbance.
What We Don’t Know
We still don’t know exactly which volcano was responsible for the initial 536 event.
Scientists have proposed possible sources and examined microscopic volcanic material preserved in ice, but the case isn’t closed.
We also can’t reconstruct the experience of every person or community living through this period.
The written record is uneven. Some regions left far more evidence than others. Environmental proxies can show us temperature changes, volcanic forcing and difficult growing conditions, but they can’t tell us what dinner looked like in every sixth-century household.
And we cannot confidently blame every famine, migration, war, political transformation or disease outbreak of the following decades on volcanic eruptions.
Climate history is not a giant domino setup where one eruption knocks over civilization.
Human societies are messier than that.
What Probably Happened
Sometime around 536, a major volcanic eruption injected sulfur-containing gases high into the atmosphere.
Those gases formed sulfate aerosols capable of reflecting sunlight and reducing the amount reaching the Earth’s surface.
People noticed the result.
The sun looked weak.
Temperatures dropped.
Growing conditions deteriorated across substantial parts of the Northern Hemisphere.
Then, before the climate had fully recovered, another major eruption occurred around 540.
More cooling followed.
In some places, crops failed and food became scarce. All of this happened inside societies already dealing with their own wars, politics, diseases and inequalities, which meant the consequences were never going to look exactly the same everywhere.
There was no single worldwide experience of 536.
But there was a very real climatic shock.
The people living through it recorded what they could see.
The natural world preserved the rest.
Which finally brings me back to the question that started this whole rabbit hole.
Was 536 Really the Worst Year to Be Alive?
After spending this much time with 536, I think the thing that bothers me most about calling it the “worst year to be alive” is how clean that phrase makes everything sound.
One year.
One disaster.
One winner in the historical misery Olympics.
That’s not really what the evidence gives us.
536 didn’t arrive on January 1 with a sign announcing:
Congratulations. This year is going to fucking suck.
Something happened to the atmosphere.
People noticed the sun behaving strangely.
Temperatures fell.
Growing conditions deteriorated.
Then another major eruption followed only a few years later.
The Justinianic Plague arrived after that.
And the people living through all of this didn’t know they were inside something historians and scientists would eventually give names to.
There was no Volcanic Winter of 536 to them.
No Late Antique Little Ice Age.
No chart showing reconstructed summer temperatures.
No ice-core chronology.
They just had the weather.
The harvest.
The sky.
And whatever happened next.
I keep thinking about that.
Imagine looking at the sun and realizing it hasn’t looked right for months.
You don’t know there’s been an enormous volcanic eruption somewhere.
You don’t even know where “somewhere” is.
You don’t know particles high in the atmosphere are scattering sunlight.
You don’t know the cold summer you’re experiencing is being recorded inside the tree growing outside your home.
You don’t know snow falling thousands of miles away is trapping chemical evidence of the thing you’re living through.
You just know the seasons aren’t doing what they’re supposed to do.
And you need the crops to grow.
That’s frightening enough.
We don’t need to turn 536 into the apocalypse.
We don’t need to blame every sixth-century catastrophe on one volcano.
And we definitely don’t need to pretend there is some objective scoreboard proving that one year was worse than every other year humans have survived.
Maybe 536 wasn’t the worst year to be alive.
There probably isn’t such a thing.
But I understand why the phrase stuck.
Because something happened that year that people could see but couldn’t explain.
And then, centuries later, we found witnesses they never knew they had left behind.
The trees remembered.
The ice remembered.
The chroniclers remembered.
None of them knew they were recording pieces of the same story.
Procopius couldn’t know that someone almost fifteen hundred years later would compare his strange sun with sulfate buried beneath Greenland ice.
The people preserving records of failed bread couldn’t know that trees growing hundreds or thousands of miles away were recording the same period of climatic stress.
Chinese chroniclers couldn’t know that their reports would eventually be placed beside Mediterranean accounts and modern climate reconstructions.
The trees didn’t know about Procopius.
The ice didn’t know about Cassiodorus.
And Procopius sure as hell didn’t know about ice cores.
They were independent witnesses.
One wrote with ink.
One grew rings.
One fell as snow.
And almost fifteen hundred years later, we finally introduced them to each other.
Sources & Further Reading
Every History After Dark article is built from multiple sources whenever possible.
The year 536 presents an unusual research problem because no single source tells the entire story. Contemporary writers described a strangely dimmed sun and abnormal seasons without knowing their cause. Other historical traditions preserve evidence of food shortages and unusual weather during the broader period. Centuries later, tree rings, ice cores and other environmental evidence gave researchers an entirely different record to compare with those written accounts.
For this article, I compared ancient and medieval written sources with modern research in volcanology, paleoclimatology, dendrochronology, archaeology and plague history. Particular care was taken to distinguish what people living through the sixth century actually recorded from what modern researchers infer from the physical evidence.
Primary & Near-Contemporary Sources
Procopius of Caesarea. History of the Wars, Books III–IV.
Procopius was a sixth-century Byzantine historian and one of the most important contemporary witnesses used in this article. During the reign of Justinian, he recorded the extraordinary appearance of the sun in 536, describing light without its usual brightness and comparing it with the sun during an eclipse.
His account is especially valuable because he was writing during the period in which the disturbance occurred rather than reconstructing it centuries later.
The English translation consulted was H. B. Dewing’s edition of History of the Wars, alongside an older English edition available through Project Gutenberg.
Cassiodorus. Variae / The Letters of Cassiodorus.
Cassiodorus, a Roman statesman working in Ostrogothic Italy, left another important description of unusual atmospheric and seasonal conditions.
In a letter traditionally associated with the disturbance of 536, he described a weakened or strangely colored sun, diminished shadows, abnormal weather and seasons that no longer behaved as expected.
Thomas Hodgkin’s English translation of The Letters of Cassiodorus was consulted alongside historical material on Cassiodorus hosted by Georgetown University.
The Annals of Ulster.
The medieval Irish annals preserve entries describing severe food shortages during the sixth-century climatic downturn, including the famous references to a “failure of bread.”
Because the surviving annals were compiled and transmitted after the events they describe, they should not be treated exactly like an eyewitness account written in 536. They are nevertheless important evidence for records or memories of serious subsistence crises during this period.
The electronic edition consulted was produced by CELT: The Corpus of Electronic Texts, University College Cork.
The Annals of Inisfallen.
Another Irish annalistic tradition consulted while investigating sixth-century famine, weather and social disruption.
Like the Annals of Ulster, these records require caution because the surviving texts were compiled after the events they record. They are most useful when compared with other historical and environmental evidence rather than treated as stand-alone proof.
The electronic edition consulted was produced by CELT: The Corpus of Electronic Texts, University College Cork.
Chinese historical records, including the Wei shu, Nan shi and Liang historical traditions.
Chinese chronicles preserve reports of unusual atmospheric and climatic events during the period surrounding 536, including yellow dust or material falling from the sky, abnormal cold, frost, snow, drought, crop failures and famine.
Rather than relying on isolated translations from popular retellings, these records were investigated through modern scholarly work identifying the underlying Chinese historical sources and placing individual reports within their chronological and geographic context.
The reported yellow dust or material should not automatically be interpreted as volcanic ash. Dust storms and other atmospheric phenomena were also recorded, and the exact cause of individual observations remains uncertain.
Ice Cores, Volcanic Eruptions & Climate
Michael Sigl et al. “Timing and Climate Forcing of Volcanic Eruptions for the Past 2,500 Years.” Nature 523, 2015.
One of the most important scientific sources used for this article.
Sigl and colleagues reconstructed volcanic activity over approximately 2,500 years using multiple Greenland and Antarctic ice cores and compared the resulting chronology with tree-ring evidence.
Their work identified major volcanic aerosol events associated with the severe climatic disturbances of the sixth century and provided strong evidence that the extraordinary cooling beginning around 536 was volcanic in origin.
The research also demonstrates why the sixth-century crisis should not be treated as the consequence of one isolated eruption. Evidence points toward multiple major eruptions occurring within a relatively short period, producing repeated climatic forcing.
The supplementary datasets were also consulted to better understand the ice-core chronologies, volcanic sulfate deposition and reconstruction of eruption dates.
Ulf Büntgen et al. “Cooling and Societal Change during the Late Antique Little Ice Age from 536 to around 660 AD.” Nature Geoscience 9, 2016, pp. 231–236.
A major paleoclimate study combining long tree-ring chronologies from the European Alps and Altai region.
Büntgen and colleagues identified exceptionally cold conditions beginning in 536 and additional cooling associated with later volcanic events. They proposed the term Late Antique Little Ice Age for the prolonged period of Northern Hemisphere cooling beginning in the sixth century.
This source is particularly important for placing 536 within a longer climatic episode instead of presenting the famous “dark year” as an isolated twelve-month disaster.
The authors also explore possible relationships between climatic change and social transformation. Those interpretations require more caution than the underlying climate reconstruction itself.
“Volcanic dust veils from sixth century tree-ring isotopes linked to reduced irradiance, primary production and human health.” Scientific Reports, 2018.
This study examines sixth-century tree-ring isotope evidence for reductions in solar radiation associated with volcanic aerosols.
It provides another independent line of evidence for the environmental effects of the sixth-century atmospheric disturbances and helps explain how reduced sunlight affected plant productivity and growing conditions.
Additional peer-reviewed research in Nature Communications concerning sixth-century climate and environmental change was also consulted as supporting scientific context.
Tree Rings & the Natural Archive
Tree rings were particularly important to this research because they provide evidence entirely independent of ancient written accounts.
Trees growing during the sixth century physically recorded unusually poor growing conditions. Narrow rings and later wood-anatomical and isotope studies allow researchers to reconstruct exceptionally cold summers and reduced growing conditions across parts of the Northern Hemisphere.
The tree-ring evidence used here was examined primarily through the work of Büntgen and colleagues, Sigl and colleagues, and subsequent scientific studies of sixth-century volcanic forcing.
East Asian Evidence
David W. Pankenier. “The Climate Downturns in China Caused by Volcanic Eruptions in 535–40 CE.” Asiatische Studien / Études Asiatiques, 2023.
One of the most useful sources found during this project for understanding what happened in China.
Pankenier reviews Chinese historical evidence for climatic disturbances during the 530s and 540s, including unusual cold, frost and snow, drought, crop failure and famine.
The article is particularly valuable because it works directly with Chinese historical traditions rather than merely repeating the common modern claim that “China experienced summer snow.” It also distinguishes the chronology and geography of different reported events instead of treating China as though the entire region experienced identical conditions simultaneously.
This became the principal modern scholarly source used for the Chinese historical evidence.
Dallas H. Abbott, Dee Breger, Pierre E. Biscaye and Robert A. Juhl. “Calendar-year dating of the Greenland Ice Sheet Project 2 (GISP2) ice core from the early sixth century using historical, ion, and particulate data.” Geosphere, 2014.
Abbott and colleagues compare GISP2 ice-core evidence with historical observations, including Chinese records.
Of particular interest is their table of dust-related events recorded in China between AD 500 and 560. The study identifies reports in sources including the Wei shu, Nan shi and Liang historical records and provides references allowing those observations to be traced toward the underlying historical texts.
The paper was useful for locating the Chinese source tradition and constructing a chronology. Its arguments concerning possible extraterrestrial material, however, were not treated as an established explanation for the 536 event.
Additional work by Abbott and colleagues concerning unusual particles recovered from Greenland ice was consulted while investigating alternative hypotheses. Current evidence for major volcanic forcing is substantially stronger, so an extraterrestrial explanation is not used in this article.
The Justinianic Plague
Merle Eisenberg and collaborators — research on the Justinianic Plague and the construction of the “plague pandemic” concept.
Modern plague scholarship was consulted because the first historically documented plague pandemic reached the Mediterranean several years after the climatic downturn began.
This research was particularly important for resisting an extremely tempting narrative:
volcano → cooling → famine → plague
The chronology makes climatic conditions relevant to the world in which the Justinianic Plague emerged, but temporal proximity does not prove that the eruptions caused the pandemic.
For that reason, the plague is treated here as another catastrophe occurring during an already difficult sixth century—not as the inevitable final step in a volcanic chain reaction.
Alpine Ice Cores, Archaeology & Economic Change
Michael McCormick et al. “Alpine ice-core evidence for the transformation of the European monetary system, AD 640–670.” Antiquity.
Research involving the Colle Gnifetti Alpine ice core was consulted while investigating how high-resolution ice-core records can be connected with historical and archaeological evidence.
Although the central subject of the study is later European silver production and monetary change, the ice core preserves environmental evidence extending into the sixth century and became part of the modern discussion surrounding 536.
Claims that this research conclusively identified a particular Icelandic volcano as the source of the 536 eruption should be treated cautiously. Later volcanic research has continued to investigate the source.
Historical & Institutional Sources
University of Cambridge — “Silent Witnesses.”
Cambridge material concerning ice-core research, archaeological science and the reconstruction of past environmental and economic events was consulted as accessible institutional context for some of the scientific work used in this article.
Sarah Zielinski. “Sixth-Century Misery Tied to Not One, But Two, Volcanic Eruptions.” Smithsonian Magazine, July 8, 2015.
A useful public-facing explanation of research published by Sigl and colleagues. It helped identify the underlying scientific literature, which was then consulted directly.
Becky Little. “Why Much of the World Went Dark for 18 Months in 536 A.D.” HISTORY.
This provided an overview of the commonly told version of the 536 story, including Procopius, Cassiodorus, Michael McCormick, volcanic research and the later Justinianic Plague.
It was used primarily as a starting point for identifying claims that could then be checked against primary sources and scholarly research rather than as principal evidence.
Science — “Why 536 Was ‘the Worst Year to Be Alive.’”
This article was particularly useful for tracing the modern popularity of the phrase “worst year to be alive.”
Historian Michael McCormick’s description of 536 as the beginning of one of the worst periods to be alive—and possibly the worst year—became widely repeated in popular coverage.
Here, that phrase is treated as a provocative historical assessment to investigate rather than an objectively measurable fact.
Other modern sources consulted during the exploratory stage included coverage from Newsweek, ExplorersWeb and Socrates Journey. These were useful for identifying claims and research leads, but stronger primary and scholarly sources were preferred wherever available.
Sources Consulted but Not Relied Upon
Not everything encountered during the research process ultimately deserved a place in the evidence behind the article.
Material from IrishCentral concerning Irish famine history turned out to concern the much later Great Hunger and was not useful for establishing conditions in sixth-century Ireland.
An article by Ian Adamson / Colin Dykes, “The Myth of Gaelic Ireland,” was also investigated because it discusses the sixth-century climatic catastrophe and attempts to connect it with political changes in Ireland. Its broader historical arguments are controversial, and stronger annalistic, archaeological and scientific sources were available, so it was not relied upon.
A number of popular retellings were also consulted during the early research stage. Dramatic claims about worldwide famine, civilizational collapse, volcanic ash, plague and the “worst year in history” were checked against stronger sources before being included—or left out.
The Research Trail
This article started with a deceptively simple question:
Was 536 really the worst year to be alive?
The answer got considerably messier the farther I followed it.
The biggest problem was separating an extraordinary historical event from the enormous pile of disasters that have been attached to it afterward.
The evidence strongly supports major volcanic forcing and severe climatic disruption beginning around 536. What it doesn’t give us is permission to turn every bad thing that happened during the following decades into another consequence of the same eruption.
The source volcano remains uncertain.
Reports of yellow material in Chinese records cannot simply be labeled volcanic ash.
The climatic effects were geographically uneven.
Later famine, migration, warfare and political change have to be investigated on their own evidence.
And the Justinianic Plague, which began several years later, cannot simply be reduced to the final step in a neat volcanic chain reaction.
That distinction ended up mattering much more than I expected when I started.
Because the real history of 536 is already strange enough.
It doesn’t need our help.
A Note on Sources
“The worst year to be alive” makes an excellent question.
It makes a much poorer historical fact.
There is no objective way to rank every year of human history according to misery, and the experience of someone living in 536 depended enormously on where they lived and what their circumstances were.
What we can establish is remarkable enough.
Beginning around 536, people in widely separated parts of the Northern Hemisphere experienced unusual atmospheric conditions and severe climatic disruption. Modern tree-ring and ice-core evidence confirms major volcanic forcing during the period. Additional eruptions followed, contributing to an extended period of cooling that some researchers have called the Late Antique Little Ice Age.
But the different kinds of evidence don’t all tell us the same thing.
Written sources tell us what people noticed.
Physical evidence tells us what happened to the environment.
Modern researchers try to connect the two.
And none of those records is perfect.
Written sources survive unevenly and were created by people interpreting events through the knowledge and beliefs of their own cultures. Environmental proxies require dating, calibration and interpretation. Scientific reconstructions can change as new evidence appears.
So throughout this article, I’ve tried to keep three things separate:
what sixth-century people recorded,
what the physical evidence demonstrates,
and what modern researchers infer from the combination of the two.
Because we don’t need to turn 536 into an apocalypse to make it frightening.
For the people who watched the sun lose its brightness, crops fail and familiar seasons stop behaving normally, the reality was strange enough.
History is often stranger than fiction.
See you next Friday.
— Destiny
destinylaharris 