The strawberry is unusual amongst the great fruits of the table in that the fruit now grown across the world is younger than the printing press, and in that it owes its existence not to a single domestication but to a chance marriage of two wild species from opposite ends of the Americas. Three distinct wild strawberries form the botanical foundation of the story, each native to a different quarter of the Northern Hemisphere. Fragaria vesca, the woodland or alpine strawberry (the fraises des bois of the French and the fragoline di bosco of the Italians), grows wild across the entire Eurasian landmass, from the Atlantic coast of Ireland through Central Europe, the Caucasus, Central Asia, and Siberia to Japan and China, in mountain meadows, on forest edges, and in hedgerows. It has been gathered by peoples across Eurasia since the Mesolithic, and it is the strawberry of Roman literature, of medieval monastery gardens, and of Charlemagne's court, whose Capitulare de Villis ordered it planted on the imperial estates around the year 795. It is tiny, deeply perfumed, and fleeting, and for all its fragrance it could never be coaxed into a large fruit; the woodland strawberry remains, even now, a thing gathered rather than truly farmed.

Simultaneously and independently, two larger wild strawberries grew in the Americas. Fragaria virginiana, the Eastern American or Virginian strawberry, intensely flavoured and cold-hardy, was central to the food culture of dozens of North American Indigenous nations for thousands of years; the Haudenosaunee honoured it in a thanksgiving ceremony and crushed it into cornmeal cakes. On the Pacific coast of South America, the Mapuche of what is now Chile cultivated Fragaria chiloensis, the beach or Chilean strawberry, a fruit larger and firmer than either of its relatives, with a musky, almost pineapple-like fragrance, thriving on coastal fog and volcanic soils. None of these three wild species, however, is the strawberry of the modern kitchen.

The garden strawberry, Fragaria × ananassa, was born by accident in Plougastel, in Brittany, around 1750. The Chilean strawberry had been carried to France in 1714 by the naval officer Amédée-François Frézier, who returned from a survey of the Chilean coast with a handful of surviving plants; set out in the Breton soil alongside Virginian strawberries already in cultivation, the Chilean females were pollinated by the American males, and the cross produced a fruit larger, sweeter, and far more productive than either parent. The botanist Antoine Nicolas Duchesne, working at Versailles in the 1760s, was the first to understand what had happened, recognising the new plant as a hybrid of the two American species and naming it for the pineapple-like scent of its flesh. Every strawberry sold in every market in the world today descends from that single chance encounter in a Breton garden, a hybrid scarcely more than two and a half centuries old.

The strawberry's journey is really two journeys: the slow, prehistoric drift of the wild species across the continents, and the swift, documented travels of the seventeenth and eighteenth centuries that brought two of those wild species together and sent their hybrid offspring around the world. The woodland strawberry, Fragaria vesca, needed no human help at all; over millennia its seeds were carried by birds and small mammals until it had colonised Europe, Asia, and the fringes of North Africa, the only strawberry the Old World knew until the seventeenth century. Roman writers from Virgil and Ovid to Pliny the Elder noted it, medieval monks grew it in their physic gardens, and in the fourteenth century King Charles V of France ordered more than a thousand plants set in the royal garden of the Louvre, the first deliberate cultivation of the strawberry in Europe at any scale.

The transformation began with the crossing of the Atlantic. The Virginian strawberry (F. virginiana) reached Europe in the early seventeenth century, brought back by English colonists from the eastern seaboard of North America; its bolder flavour and larger fruit quickly established it in French and English gardens. Then, in 1714, the naval officer Amédée-François Frézier returned from a reconnaissance of the Chilean coast undertaken for Louis XIV and carried a few surviving plants of the Chilean beach strawberry (F. chiloensis) to Brest and Plougastel. The Chilean plants he had collected were, by chance, all female, and bore no fruit alone; but set out near the Virginian strawberries already grown in Brittany, they were pollinated, and around 1750 the cross produced Fragaria × ananassa, the garden strawberry, larger and sweeter than anything Europe had seen.

From Brittany the new hybrid spread across Europe with remarkable speed. It reached England by the turn of the nineteenth century, where the great fruit-growing counties of Kent and Surrey made it the berry of the Victorian summer; in 1877 strawberries and cream were served at the first Wimbledon lawn tennis championship, founding one of the most enduring marriages of food and sport. The garden strawberry then returned to the Americas it was half-descended from, this time as a commercial crop: by the mid-twentieth century the coastal valleys of California, around Watsonville and Salinas, had become the largest strawberry-growing region on earth, supplying fresh and frozen fruit across the world. Japan received the garden strawberry during the Meiji modernisation of the later nineteenth century and, through decades of meticulous breeding aimed at fragrance and sweetness rather than durability, produced luxury cultivars such as Amaou and Tochiotome that are sold like jewellery in department stores. Korea developed its own celebrated varieties, Seolhyang and Maehyang, after independence, and North Africa, in Egypt's Nile Delta and Morocco's Souss-Massa plain, became a winter supplier to the European market. From a wild fruit gathered in the forests of three continents, the strawberry has become a crop grown on every inhabited landmass.

The garden strawberry, Fragaria × ananassa, is today one of the most widely consumed fruits in the world, grown commercially on every inhabited continent and produced in the greatest quantity by China, the United States, Mexico, Egypt, Turkey, and Spain. The modern fruit is the product of two competing breeding philosophies. Western commercial growers, above all in California, have selected for size, uniformity, yield, and the firmness that allows a berry to survive refrigerated transport across thousands of kilometres, a triumph of logistics that has made the strawberry an everyday fruit available far out of season. The breeders of Japan and Korea, by contrast, have pursued fragrance, sweetness, and visual perfection above all else, producing named luxury cultivars such as Amaou, Tochiotome, Seolhyang, and Maehyang that are boxed in velvet and given as gifts rather than sold by the punnet.

The garden strawberry has, in turn, gathered to itself a remarkable freight of cultural ritual. It is the fruit of the English summer and of Wimbledon, of the French tarte aux fraises and fraisier, of the American shortcake and ice cream, of the Australian pavlova on a hot Christmas day, and of the Japanese and Korean Christmas cake of chiffon sponge, cream, and a single faultless berry on top. Yet the modern fruit exists alongside its wild ancestors, which never disappeared. Fragaria vesca, the original Eurasian woodland strawberry, still grows wild across Europe and Asia and is still gathered and grown in small quantities as the fraises des bois of France, the fragoline di bosco of Italy, and the Walderdbeeren of Germany. Its flavour is markedly more intense than any garden variety: smaller, more aromatic, with a wild complexity that no commercial breeding programme has ever matched. The distinction matters, for the strawberry on the supermarket shelf and the strawberry in an alpine meadow are separated by two and a half centuries of hybridisation and an enormous difference of flavour, fragrance, and meaning. Botanically, moreover, neither is a true berry at all: the strawberry is an aggregate accessory fruit, its sweet red flesh the swollen receptacle of the flower, and its true fruits the tiny yellow pips, or achenes, scattered across the surface.