The Great Famine of 1315–1317 killed hundreds of thousands of people across northern Europe, making it one of the deadliest hunger crises in the continent’s recorded history. But its significance extends well beyond the death toll. For modern researchers, the famine serves as a case study in how abrupt climate shifts translate into cascading health disasters, and skeletal evidence from medieval cemeteries now reveals that its biological consequences reached decades into the future, weakening survivors in ways that may have primed Europe for the Black Death a generation later.
Three Years of Rain
The immediate trigger for the famine was rain, and an extraordinary amount of it. Tree-ring reconstructions using the Old World Drought Atlas show that the summers of 1314, 1315, and 1316 brought extremely wet conditions across much of Europe, with the moisture centered over modern-day France, Ireland, the United Kingdom, Belgium, Switzerland, Germany, Denmark, Poland, and the Baltic states. Many regions reached drought-index values in the range of +4 to +6, meaning conditions were about as saturated as the reconstruction ever records for those areas. The pattern held stubbornly for three consecutive summers before dissipating to more neutral levels in 1317.1Communications Earth & Environment. A quantitative hydroclimatic context for the European Great Famine of 1315–1317
For peasant agriculture that depended entirely on seasonal weather, three sodden growing seasons in a row was catastrophic. Grain could not ripen properly in waterlogged fields. Hay rotted before it could be stored. Salt, essential for preserving meat and fish, became almost impossible to produce by evaporation. The result was not just one bad harvest but a rolling collapse of the food supply that stripped away reserves built up over the preceding decades of relatively favorable climate.
A Bigger Climate Story
The rains of the 1310s were not a freak accident. Paleoclimate researchers now view them as part of a broader transition between two major climate regimes: the Medieval Climate Anomaly, a period of generally warmer and more stable conditions that had prevailed for centuries, and the Little Ice Age, a prolonged cool phase that would last well into the early modern period. The cold and wet anomalies of the 1310s, sometimes called the Dantean Anomaly, sit squarely at this hinge point.2Climate of the Past. A prequel to the Dantean Anomaly: the precipitation seesaw and droughts of 1302 to 1307 in Europe The famine, in other words, was an early symptom of a climate regime change that would reshape European agriculture, settlement patterns, and disease ecology for centuries.
Research synthesizing climate data and historical records across medieval and early modern Europe confirms that anomalous cold conditions were the main environmental backdrop for severe food-production crises that could escalate into full-blown famines in preindustrial societies. These famines are best understood not as purely natural disasters but as the product of interactions between climatic stressors and preexisting social vulnerabilities.3WIREs Climate Change. Famines in medieval and early modern Europe—Connecting climate and society The Great Famine fits this model perfectly: the rain was the spark, but the tinder had been accumulating for years.
Not Everyone Starved Equally
The geography of the famine was strikingly uneven, and understanding why tells us something important about how climate-driven food crises actually work. The same tree-ring data that document the extreme wetness across northern Europe show no significant moisture anomalies over southern Italy during those years. Historical chronicles confirm this: southern Italy was actually exporting food during the Great Famine while much of the rest of the continent went hungry.1Communications Earth & Environment. A quantitative hydroclimatic context for the European Great Famine of 1315–1317
This geographic patchwork matters because it shaped who had access to food and at what cost. Regions connected to Mediterranean trade networks, or those with access to ports and functioning grain markets, had at least a theoretical lifeline. But as we will see, market failures often severed that lifeline even where food physically existed. The uneven geographic footprint also means that skeletal and documentary evidence from different parts of Europe tells different stories about the famine’s severity, making it risky to generalize from any single site.
When Markets Made It Worse
The Great Famine started as an ecological disaster, but human systems amplified it dramatically. A detailed analysis of grain markets in England and Wales during the crisis, drawing on the economist Amartya Sen’s framework of entitlement failures, found that the famine was intensified by a cascade of market breakdowns. Grain prices spiraled out of control. Local markets that normally distributed food across regions became segmented, meaning grain stayed where it was produced rather than flowing to where it was needed. Market supervision by local authorities declined. Hoarding and what researchers call “preferential trade,” where sellers directed grain to well-connected buyers rather than open markets, became widespread.4Past & Present. Market Failure during The Great Famine in England and Wales (1315–1317)
The conclusion is striking: compared with other major European famines, the Great Famine was a catastrophe on a different scale, one that the same researchers compare to food crises in the modern developing world. The ecological crisis was the starting condition, but once markets failed, the disaster became self-reinforcing. People who might have survived a single bad harvest starved because the institutions responsible for moving food broke down simultaneously.
The Bovine Pestilence That Followed
The famine’s damage to agriculture did not end when the rains finally eased. Beginning around 1319, a devastating cattle plague swept through England and Wales, killing roughly 62 percent of bovine animals in the space of about two years. The murrain, as it was called, struck both manor-owned herds and the small numbers of cattle kept by peasant households. The most immediate nutritional consequence was a sharp decline in the supply of dairy products available for human consumption.5The Economic History Review. The Great Bovine Pestilence and its economic and environmental consequences in England and Wales, 1318–50
Dairy products were one of the few significant protein sources accessible to the medieval English poor. Losing most of the national dairy herd meant that even after grain harvests recovered, the population’s protein intake remained depressed for years. The cattle population took decades to rebuild, extending the nutritional fallout of the famine era well into the 1340s. Some scholars have asked whether this prolonged protein shortage weakened immune function across the population, making people more vulnerable when the Black Death arrived in 1348–1349. The idea is speculative but biologically plausible: chronic protein deficiency impairs the immune system’s ability to fight off infection.
Contaminated Grain and Ergotism
Starvation was not the only dietary threat during the famine years. When harvests are poor and grain is in short supply, people eat whatever they can get, including crops that would normally be discarded. Rye and other cereals grown in waterlogged conditions are especially susceptible to infection by Claviceps fungi, which produce toxic alkaloids collectively known as ergot. Ergotism has been documented in Europe since the early Middle Ages, and the alkaloids severely affect the health of both humans and livestock.6PubMed Central. Biology, genetics, and management of ergot (Claviceps spp.) in rye, sorghum, and pearl millet
There are two main forms of ergotism. The convulsive form causes muscle spasms, hallucinations, and seizures. The gangrenous form restricts blood flow to the extremities, causing burning pain and, in severe cases, the death and loss of fingers, toes, and limbs. Medieval sources describe outbreaks of “St. Anthony’s fire” during periods of food scarcity, and the conditions of 1315–1316, with widespread rain promoting fungal growth and desperate people eating whatever grain was available, would have been ideal for ergot contamination. While direct evidence for large-scale ergotism during the Great Famine is patchy, the environmental conditions were a textbook setup for it.
What Bones Reveal About Famine Stress
Some of the most compelling evidence for the famine’s health impact comes not from chronicles but from skeletons. Excavations at the St. Mary Spital cemetery in London, which was in use from roughly 1120 to 1540, have provided researchers with a large sample of burials that can be divided into “famine” and “attritional” (normal background mortality) categories based on their archaeological context.
Analysis of children’s remains from this site found that burials identified as famine-related showed a significant association with linear enamel hypoplasia, or LEH, which are visible grooves or pits in the tooth enamel caused by disruptions to growth during childhood. This association held even after accounting for age, suggesting that children who died during famine episodes were more likely to have experienced earlier physiological stress.7PubMed. Patterns of frailty in non-adults from medieval London In plain terms, the children most likely to die during a famine were not a random cross-section of the population; they were children who had already been weakened by prior hardship.
A broader study of both adults and children from the same cemetery confirmed these patterns. Famine burials were significantly associated with LEH, while attritional burials were more strongly associated with periosteal lesions, a type of bone inflammation often linked to chronic infection. The distinction held regardless of age or sex, suggesting that famine mortality was selective: it preferentially killed people who carried biological markers of earlier stress.8PubMed. Frailty and famine: Patterns of mortality and physiological stress among victims of famine in medieval London
Childhood Hunger, Lifelong Consequences
The idea that early-life malnutrition has health consequences decades later is well established in modern medicine. Researchers have now tested it in the medieval period using a clever technique called incremental dentine analysis, which reads chemical signatures laid down in teeth during childhood, year by year, much like reading tree rings. By measuring nitrogen isotopes in dentine, scientists can estimate whether a person experienced nutritional stress at specific ages during childhood and then compare those signatures against how long the person lived and what skeletal markers of disease they developed.
The results from medieval English populations are consistent with what developmental biology would predict: early-life nutritional stress was associated with skeletal markers of physiological stress and elevated mortality in middle and late adulthood.9PubMed Central. Childhood nutritional stress and later-life health outcomes in medieval England: Evidence from incremental dentine analysis Children who endured hunger during the famine years did not simply bounce back when food returned. Their bodies carried the imprint of that deprivation for the rest of their lives, in ways that shortened those lives and made them more susceptible to disease.
This finding reframes the Great Famine as something more than a three-year crisis. Its health consequences rippled forward through the bodies of survivors, creating a cohort of adults who entered middle age already compromised. The timing is significant: children born during or just before the famine years of 1315–1317 would have been in their thirties and forties when the Black Death reached England in 1348.
The Famine’s Shadow Over the Black Death
The question of whether the Great Famine primed Europe for the Black Death is one of the most debated in medieval health research. Recent work comparing skeletal markers among famine victims and plague victims from medieval London offers some intriguing findings. Modeling of burial data shows that people who died of plague were significantly different in their skeletal profiles from people who died during famine episodes. Plague victims were about 4.5 times more likely to have at least one LEH compared to famine victims, were more likely to have shorter-than-average femurs (a marker of growth disruption), and tended to be older.10PubMed Central. Selective mortality during famine and plague events in medieval London
The LEH finding is particularly telling. Enamel defects are permanent records of childhood stress. The fact that plague victims were nearly five times more likely to have these defects than famine victims suggests that people carrying scars of early-life hardship were disproportionately killed by the plague. Famine victims, by contrast, skewed younger and were less likely to show LEH, which makes sense: during an acute food crisis, the very young and old die first regardless of prior health history.
The model also found that famine victims were about 1.5 times more likely to be female, while plague victims were slightly less likely to be female compared to famine victims. The reasons for this sex difference are not fully understood, but they hint at differential access to food during scarcity and possibly different biological susceptibility to infectious disease.
None of this proves a direct causal chain from the 1315 famine to the 1348 plague. But combined with the evidence that childhood malnutrition produced lifelong health deficits, and that the bovine pestilence extended protein shortages into the 1340s, the circumstantial case is strong. The generation that survived the Great Famine may have entered the Black Death era with compromised immune reserves and stunted bodies, making them more vulnerable when Yersinia pestis arrived.
How Selective Was Famine Mortality?
One of the most important insights from the skeletal evidence is that famine did not kill indiscriminately. The concept researchers use is “selective mortality,” the idea that certain segments of a population are more likely to die during a crisis because of preexisting vulnerabilities. The London cemetery data paint a consistent picture: famine burials cluster among the young and among individuals with markers of prior physiological stress. People who were already weakened by earlier bouts of malnutrition, disease, or growth disruption were the ones most likely to succumb when food became scarce.
This has practical implications for how we interpret famine mortality statistics. A famine that kills 10 percent of a population does not simply remove a random tenth of the people. It selectively removes the most vulnerable, which reshapes the health profile of the surviving population. In theory, this culling effect could make the surviving population healthier on average in the short term, but the long-term picture is grimmer. Survivors who were children during the famine carry lasting biological damage, as the dentine analysis shows, and the population’s overall nutritional reserves remain depleted for years.
Lessons for Understanding Climate and Health
The Great Famine is increasingly studied not just as a medieval event but as a test case for how climate shocks translate into health crises. The pattern it reveals is layered and nonlinear. An abrupt climate anomaly destroys harvests. Market and institutional failures prevent the remaining food from reaching those who need it most. Malnutrition opens the door to food contamination and opportunistic infections. The acute crisis passes, but the biological damage persists in survivors for decades, making the population fragile when the next shock arrives.
Modern famines show remarkably similar dynamics. The role of market failure in amplifying an ecological crisis, the selective mortality that falls hardest on the already vulnerable, the long developmental shadow cast over children who survive, these patterns repeat in twentieth- and twenty-first-century food crises. What the medieval evidence adds is time depth. With skeletal biomarkers and paleoclimate reconstructions, researchers can trace the health consequences of the 1315 famine across an entire generation, watching its effects propagate forward into the Black Death era in ways that documentary sources alone could never reveal.
The tree-ring data, meanwhile, are steadily refining our picture of exactly what happened climatically. The identification of the early 1300s drought that preceded the Dantean Anomaly, the mapping of regional differences in moisture anomalies across Europe, and the growing ability to quantify just how extreme the 1314–1316 wet period was relative to the last several centuries, all give researchers a sharper framework for understanding the climate forcing behind the crisis. Southern Italy’s escape from the worst of the rains, confirmed by both tree rings and contemporary accounts, underscores that even continent-scale climate anomalies have patchwork footprints. Where you lived determined whether you starved, as much as when you lived.