Beans don’t come from any single place. Different species were independently domesticated on nearly every inhabited continent, from the highlands of Mexico to the river valleys of China to the savannas of West Africa. The common bean you find in most grocery stores, including kidney beans, black beans, and pinto beans, originated in the Americas. But the full story of beans spans at least 10,000 years and touches almost every early civilization on Earth.
Common Beans: Two Origins in the Americas
The common bean, the species behind black beans, kidney beans, navy beans, pinto beans, and dozens of other familiar varieties, was domesticated not once but twice. One domestication happened in Mesoamerica (modern-day Mexico and Central America), and the other took place in the southern Andes (modern-day Peru, Bolivia, and northwestern Argentina). Both events drew from wild bean populations that had already split into genetically distinct groups long before humans started farming them.
This dual origin still shows up in the beans we eat today. Mesoamerican types tend to be smaller seeded: think black beans, navy beans, and pintos. Andean types are generally larger: kidney beans, cranberry beans, and large limas. Genetic studies consistently sort modern bean varieties into these two pools, with each group tracing back to its respective center of domestication.
Two close relatives of the common bean also come from the Americas. Lima beans were domesticated separately in both Mesoamerica and coastal Ecuador or northern Peru. Tepary beans, prized for their extreme drought tolerance, originated in the arid landscapes of northwest Mexico.
How Wild Beans Became Crops
Wild beans look and behave quite differently from the ones you buy in a store. The most important change during domestication was the loss of pod shattering. Wild bean pods split open explosively when ripe, flinging seeds onto the ground to spread the plant’s offspring. That’s great for survival in nature but terrible for farming, since it means losing your harvest before you can collect it. Early farmers, simply by gathering beans from pods that hadn’t yet burst open, gradually selected for plants whose pods stayed intact.
Other changes accumulated alongside this shift. Seeds got larger, making them more worthwhile to harvest and eat. Plants became less branchy and more compact, growing in ways that suited cultivated fields. Seed dormancy decreased too, meaning domesticated beans germinate more quickly and predictably instead of lying dormant in the soil for months or years like their wild ancestors. These changes, collectively called the domestication syndrome, happened independently in every region where a different bean species was brought under cultivation.
Lentils and Broad Beans: The Fertile Crescent
Not all “beans” in the broad culinary sense belong to the same botanical family as common beans, but their origin stories are just as old. Lentils were among the very first plants domesticated by humans, alongside wheat and barley, in Southwest Asia roughly 8,000 to 10,000 years ago. Wild lentils were gathered even earlier: archaeological sites in Israel and Syria show humans collecting them as far back as 23,000 years ago. The wild ancestor still grows in southeastern Turkey, Syria, Israel, Palestine, and Jordan, and that same region produced the earliest archaeological evidence of intentional lentil farming.
The transition from gathering to growing lentils was slow and incremental. Late hunter-gatherers likely began by intensively collecting wild stands, then experimenting with small garden plots near their semi-permanent villages. Over centuries, this casual cultivation gradually produced plants with the traits we associate with domesticated crops.
Broad beans (also called fava beans) followed a similar path in the same general region. Seeds dating back 14,000 years found at a site on Mount Carmel in Israel confirm that the wild ancestor grew in the Levant. The earliest domesticated fava beans appear at farming villages in the Lower Galilee around 10,200 years ago, making them one of the oldest cultivated legumes in the world.
Soybeans: Ancient China
Soybeans were domesticated from a wild relative that still grows across East Asia. The best current estimates place this domestication between 6,000 and 9,000 years ago in China, though the exact location remains debated. Candidate regions include southern China, the Yellow River valley in central China, and northeastern China, with some researchers also pointing to Korea and Japan as possibilities. What is clear is that soybeans became a cornerstone of East Asian agriculture and cuisine thousands of years before they reached the rest of the world.
Cowpeas: Sub-Saharan Africa
Cowpeas, including black-eyed peas, are Africa’s major contribution to the global bean supply. They were domesticated in sub-Saharan Africa before 2500 BCE. Whether domestication happened primarily in West Africa or East Africa (or both) is still actively debated, with genetic studies supporting both regions. The oldest archaeological cowpea found south of the Sahara comes from central Ghana, dated to between 1830 and 1595 BCE.
By 400 BCE, cowpeas had already spread to every major production region of the Old World, including the Mediterranean, India, and Southeast Asia. Today they’re cultivated on every continent except Antarctica.
Adzuki and Mung Beans: East and South Asia
Several important bean species originated across Asia independently from soybeans. Adzuki beans, the small red beans central to East Asian desserts and pastries, were domesticated 3,000 to 5,000 years ago in central Japan during the Jomon period. Their wild ancestor likely originated near the Himalayas and spread naturally to China and Japan. After domestication in Japan, cultivated adzuki beans expanded back into China, where they mixed with local wild populations to create the genetic diversity found in Chinese varieties today.
Mung beans, widely used across South and Southeast Asia, also trace their origins to the Asian continent, with India as a leading candidate for their domestication.
How Beans Spread Around the World
For thousands of years, each bean species stayed relatively close to its region of origin. That changed dramatically after 1492. Spanish and Portuguese explorers encountered common beans in the Americas almost immediately, and by the mid-1500s, New World beans were arriving in Europe. The earliest written record of common beans in Europe dates to 1532, when Canon Piero Valeriano received seeds from Pope Clement VII for planting in Italy. A year later, Catherine de Medici reportedly carried a bag of common bean seeds to Marseilles as part of her wedding dowry.
From Europe, common beans spread rapidly along trade routes to Africa, India, Southeast Asia, China, and Japan. The slave trade played a particularly significant role in introducing American beans to the African continent, with return voyages from the New World carrying seeds directly to West African ports. Beans also moved from Europe back to North America as European farmers developed new varieties and exported them to the colonies.
This exchange went in multiple directions. European and Asian beans moved westward to the Americas, while American beans moved east. The result is the global patchwork we see today, where a Brazilian dinner might feature beans domesticated in the Andes, a Japanese meal includes soybeans from China and adzuki beans from ancient Japan, and a Southern American plate of black-eyed peas traces back to sub-Saharan Africa thousands of years ago. Nearly every major food culture on Earth built part of its cuisine around whichever bean species arrived first or grew best in local conditions.