The Great Famine of 1315–1322 was the first of a series of large-scale crises that struck Europe early in the 14th century, causing millions of deaths over an extended number of years and marking a clear end to an earlier period of growth and prosperity during the 11th through 13th centuries. Starting with bad weather in the spring of 1315, universal crop failures lasted through 1316 until the summer of 1317; Europe did not fully recover until 1322. It was a period marked by extreme levels of criminal activity, disease and mass death, infanticide, and cannibalism. It had consequences for Church, State, European society and future calamities to follow in the 14th century.

Background
In the spring of 1315, unusually heavy rain began in much of Europe. Throughout the spring and summer, it continued to rain and the temperature remained cool. Under these conditions grain could not ripen. Grain was brought indoors in urns and pots. The straw and hay for the animals could not be cured and there was no fodder for the livestock. The price of food began to rise. Food prices in England doubled between spring and midsummer. Salt, the only way to cure and preserve meat, was difficult to obtain because it could not be evaporated in the wet weather; it went from 30 shillings to 40 shillings. In Lorraine, wheat prices increased by 320 percent and peasants could no longer afford bread. Stores of grain for long-term emergencies were limited to the lords and nobles. Because of the general increased population pressures, even lower-than-average harvests meant some people would go hungry; there was little margin for failure. People began to harvest wild edible roots, plants, grasses, nuts, and bark in the forests.
There are a number of documented incidents that show the extent of the famine. Edward II, King of England, stopped at Saint Alba's on August 10, 1315 and no bread could be found for him or his entourage; it was a rare occasion in which the King of England, the most prosperous nation in Europe, was unable to eat. The French, under Louis X, tried to invade Flanders, but being in the low country of the Netherlands, the fields were soaked and the army became so bogged down they were forced to retreat, burning their provisions where they left them, unable to carry them out.
In the spring of 1316, it continued to rain on a European population deprived of energy and reserve to sustain itself. All segments of society from nobles to peasants were affected, most of all the peasants, who represented 95% of the population and who had no safety nets. To provide some measure of relief, the future was mortgaged by slaughtering the draft animals; eating the seed grain; abandoning children to fend for themselves (see "Hansel and Gretel"); and, among old people, voluntarily refusing food in hopes of the younger generation surviving. The chroniclers of the time wrote of many incidents of cannibalism.
The height of the famine was reached in 1317 as the wet weather hung on. Finally, in the summer the weather returned to its normal patterns. By now, however, people were so weakened by diseases such as pneumonia, bronchitis, tuberculosis, and other sicknesses, and much of the seed stock had been eaten, that it was not until 1325 that the food supply returned to relatively normal conditions and the population began to increase again. Historians debate the toll but it is estimated that between 10%–25% of the population of many cities and towns died. While the Black Death (1338–1375) would kill more, for many the Great Famine was worse. While the plague swept through an area in a matter of months, the Great Famine lingered for years, drawing out the suffering of those who would slowly starve to death, face cannibalism, child-murder and rampant crime.

Great Famine
The famine is called the Great Famine not only because of the number of people who died, or the vast geographic area that was affected, or the length of time it lasted, but also because of the lasting consequences.
The first consequence was for the Church. No amount of prayer seemed effective against the causes of the famine. In a society where the final recourse to all problems had been religion, no amount of prayer was helping and the famine undermined the institutional authority of the Catholic Church. This helped lay the foundations for later movements that were deemed heretical by the Church because they opposed the Papacy.
Second was the increase in criminal activity. Medieval Europe in the 13th century had already been a violent culture where rape and murder were demonstrably more common than in modern times. With the famine even those who were not normally inclined to criminal activity would resort to any means to feed themselves or their family. After the famine, Europe took on a tougher and more violent edge; it had become an even less amicable place than during the 12th and 13th centuries. The effects of this could be seen across all segments of society, perhaps the most striking in the way warfare was conducted in the 14th century during the bloody 100 Years War, versus the 12th and 13th centuries when nobles were more likely to die by accident in tournament games than on the field of battle.
Third was the failure of the Medieval governments to deal with the crisis.
Fourthly, the Great Famine marked a clear end to an unprecedented period of population growth that had started around 1050; although some believe this had been slowing down for a few decades already, there is no doubt the Great Famine was a clear end of high population growth.
Finally, the Great Famine would have consequences for future events in the 14th century such as the Black Death when an already weakened population would be struck again.

Consequences
The evidence for cannibalism during the Great Famine is ambiguous and controversial for historians. There are reports from Livonia and Estonia, as well as Ireland and most other parts of Europe. Many historians have discounted it as being improbable that, in a time when the Renaissance was just starting and Dante was creating one of the greatest works of literature in history, people in Europe were eating one another. However, perhaps it says more about modern values, which attribute cannibalism to "the other", than about the realities of one's ancestors doing whatever it took to survive.