Barley

• 1. Introduction

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  Barley, known to botanists as Hordeum vulgare, has been feeding humanity since long before written history began. Around 23,000 BC, at a site called Ohalo II near the southern tip of the Sea of Galilee, people were already grinding wild barley on stone mortars. That single detail - grinding stones stained with traces of starch - is the earliest archaeological evidence we have of any grain being eaten by human hands.

  From that ancient shoreline, barley traveled across the entire world. It crossed mountains and deserts, fed armies and peasants and monks, became the raw material for the first alcoholic drinks humans ever made. Today it is the fourth most produced grain on the planet, with 146 million tonnes harvested in 2023. And yet most people alive today have never eaten a bowl of barley porridge, never tasted beremeal bread, and have no idea that barley once served as money, as medicine, and as the living embodiment of a god.

  How did a wild grass from the hills of Western Asia become a pillar of global civilization? And what does it mean that 70% of all the barley grown today goes not to humans but to livestock? Those questions sit at the heart of this story.

• 2. Wild Grass to Staple Crop

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  Wild barley, known to botanists as Hordeum vulgare subspecies spontaneum, once stretched across an enormous range - from North Africa and the island of Crete all the way east to Tibet. Somewhere within that range, around 9,000 BC, farmers in the Fertile Crescent made a discovery that would change what barley was.

  The wild plant had a brittle spike. When the grain ripened, the spikelets simply fell apart and scattered on the ground - a good strategy for the plant, a disaster for anyone trying to harvest it. But occasionally a mutation appeared in one of two closely linked genes, Bt1 and Bt2, that caused the spike to hold together after ripening. A farmer who gathered grain from plants with that mutation and planted their seeds had, without knowing it, selected for a crop that stayed put at harvest time.

  This nonshattering condition is recessive, meaning both copies of the gene must carry the mutation for the plant to show the trait. Over generations of planting and replanting, that mutation became fixed in cultivated lines across Mesopotamia, specifically in the region around Jarmo in what is now Iraq. Domestication also changed the grain's shape, pulling it from an elongated form toward a more rounded, spherical one.

• 3. Across Continents and Centuries

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  Archaeobotanical evidence shows that domesticated barley had spread through most of Eurasia by 2,000 BC. The movement was not a single migration but a slow branching across multiple routes over thousands of years.

  By 4,200 BC it had reached Eastern Finland. In the Korean Peninsula, traces of barley appear from the Early Mumun Pottery Period, running roughly from 1,500 to 850 BC. The Sanskrit texts of ancient India mention barley many times as a principal grain, and traces of its cultivation have been found in the Harappan civilization of the Bronze Age, a culture that flourished roughly 5,700-3,300 years ago. The Sumerian language had a word for it - akiti - and in ancient Mesopotamia a stalk of barley was the primary symbol of the goddess Shala.

  Barley beer was probably among the first alcoholic drinks Neolithic humans ever made. It was so fundamental to ancient economies that it served as currency. In Mesopotamia, the standard unit of weight for barley - the shekel - became the standard unit of value itself. Rations of barley for workers appear in Linear B clay tablets from Mycenaean sites at Knossos and at Pylos, written evidence that barley was the grain administrators counted and distributed to keep Bronze Age economies running.

  In ancient Greece, barley carried religious significance as well as nutritional value. The preparatory ritual drink of initiates into the Eleusinian Mysteries, a mixture called kykeon made from barley and herbs, is mentioned in the Homeric hymn to Demeter. The goddess's name itself may have meant "barley-mother", drawing on an ancient Cretan word for the grain. Tibetan barley became a staple of Tibetan cuisine from the fifth century AD onward, ground into a flour product called tsampa that is still eaten there today.

• 4. Beer, Whisky, and the Malt Tradition

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  About 30% of the world's barley ends up in a glass - as beer, whisky, or one of the other fermented or distilled drinks the grain makes possible. The path from raw grain to finished drink runs through a process called malting, which is ancient and precise in equal measure.

  The key distinction that shapes brewing practice is the difference between two-row and six-row barley. In two-row varieties, only the central spikelet in each cluster of three is fertile, producing two rows of grain along the ear. In six-row varieties, a pair of mutations - one dominant, one recessive - make all three spikelets fertile. The gene responsible for that transition is called vrs1. Brewers in Germany and England have traditionally reached for two-row cultivars. North American breweries have historically used six-row barley, though both varieties are in common use today. The differences between them go beyond row count; enzyme content, kernel shape, and other technical factors all matter to the people who malt and brew.

  Scottish and Irish whisky is made primarily from barley, distilled from what is called green beer. In the English brewing tradition, barley wine is a style of strong beer with a long pedigree. An 18th-century drink also called barley wine was made by boiling barley in water and mixing the result with white wine, borage, lemon, and sugar - a recipe quite different from what modern drinkers would expect.

  Not all barley drinks are alcoholic. Barley water and roasted barley tea have been made by simply boiling the grain in water. In Italy, roasted barley is ground and brewed as a coffee substitute called caffe d'orzo - barley coffee - which is still found in Italian cafes. The English pub name The Barley Mow is one of several - along with John Barleycorn, Malt Shovel, and Mash Tun - that preserve in public signage the grain's central role in the culture of beer.

• 5. Food, Folk, and Folklore

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  In medieval Europe, the social meaning of bread was plain: barley and rye bread fed peasants, while wheat products signaled wealth and class. That hierarchy persisted for centuries and left its mark on the folklore surrounding the grain.

  The English folksong "John Barleycorn" personifies barley as a character who is attacked, killed, and subjected to indignities that map onto each stage of cultivation - cut down at harvest, dried, roasted, ground, fermented. But the song gives John Barleycorn the last word. As the lyric puts it: "And little Sir John and the nut-brown bowl / Proved the strongest man at last." The man who becomes drink outlasts everyone who tried to destroy him.

  A companion piece in English tradition is the folksong "Elsie Marley", which celebrates a real alewife from County Durham. The antiquary Cuthbert Sharp, who recorded her story, described Elsie Marley as a handsome, buxom, bustling landlady who brought good custom to the ale house by her civility and attention.

  Barley's presence in English literature runs even deeper. In the Old English poem Beowulf, Scyld Scefing - a name whose second element means "with a sheaf" - is a figure associated with grain. His son is named Beow, which means "Barley". J. R. R. Tolkien, who read these poems as closely as anyone, wrote his own poem about Scyld Scefing called "King Sheave" and built one of the central images of his legendarium - the Old Straight Road from Middle-earth to the earthly paradise of Valinor - on the same mythological foundation. The 12th-century chronicler William of Malmesbury told a related tale of a figure named Sceafa, a sleeping child found in a boat without oars, a sheaf of corn at his head. Barley's grip on the mythological imagination ran from the Nile to Norway.

• 6. Language, Measure, and Medicine

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  The English word "barn" comes from the Old English compound bere-aern, meaning "barley-store". That etymology is a small window into how completely barley organized rural life: the most important agricultural building in the English countryside was named for the grain it was built to hold.

  The grain also shaped systems of measurement. In England, barley grains were once used as a standard unit of length, with nominally three or four barleycorns to the inch. By the 19th century that informal measure had been replaced by standardized units, but the word "barleycorn" remained in the language. In ancient Mesopotamia, barley anchored the entire system of weights and values: the shekel began as a measure of barley before it became a measure of silver.

  As medicine, barley water was recommended in medieval times by the physician Avicenna as a remedy. In 19th-century Japan, the naval surgeon Takaki Kanehiro took a more systematic approach. Beriberi was endemic in the Japanese armed forces, and Kanehiro introduced barley into institutional cooking to combat the disease - a decision that made barley standard prison fare and, eventually, a fixture in the rations of the Japan Self-Defense Forces.

  Modern nutritional science has found its own reasons to take barley seriously. Health Canada and the US Food and Drug Administration have both concluded that consuming at least 3 grams per day of barley beta-glucan can lower blood cholesterol, reducing the risk of cardiovascular disease. Whole-grain barley improves blood sugar regulation after meals. In 2014, an enzymatic process was developed to create a high-protein fish feed from barley, suitable for carnivorous fish such as trout and salmon - a new application for a grain whose uses have been accumulating for ten thousand years.