A surprising number of the world’s most important foods originated in the Americas. Corn, potatoes, tomatoes, chocolate, vanilla, peppers, squash, peanuts, and avocados all trace their roots to Indigenous peoples in North, Central, and South America who domesticated them over thousands of years. Before European contact, these crops were unknown to the rest of the world. Today they form the backbone of cuisines from Italy to India to Thailand.
Corn: The Americas’ Greatest Crop
Corn is the single most important crop to come out of the Americas and is now the most produced grain on Earth. Its wild ancestor was a grass called teosinte, native to the Balsas River Valley on the Pacific slopes of southern Mexico. The oldest archaeological corn cobs, found in a cave in Oaxaca, Mexico, date to roughly 6,250 years ago, though domestication likely began even earlier. Over millennia, Indigenous farmers transformed a scraggly grass with tiny kernels into the large, heavy ears we recognize today.
Corn became the foundation of civilization across the Americas. In Mesoamerica, it was processed through nixtamalization, an ancient technique that involves soaking kernels in an alkaline solution to unlock nutrients and make them easier to grind into flour. White corn varieties are best suited to this process, which is still used to make tortillas and tamales.
Potatoes: Born in the Andes
The potato was first domesticated about 8,000 years ago by communities of hunters and gatherers living near Lake Titicaca, high in the Andes of South America. That makes it one of the oldest cultivated crops from the Americas. Wild potato species still grow throughout the Andean highlands, and Indigenous farmers in Peru and Bolivia continue to cultivate hundreds of distinct varieties in colors ranging from deep purple to bright yellow.
When Spanish explorers brought potatoes to Europe in the late 1500s, the crop eventually transformed agriculture and diets across the continent. It became a staple from Ireland to Russia, and today it ranks as the world’s fourth most important food crop.
Tomatoes and Their Long Journey North
The tomato’s wild ancestor was a tiny, blueberry-sized fruit native to western South America. Its domestication followed a two-step path: first, wild populations in South America gradually increased in size to roughly cherry-sized fruits. Then, between 10,000 and 13,000 years ago, these semi-domesticated tomatoes spread northward into Mesoamerica. Around 7,000 years ago in Mexico, a second round of selection produced the larger cultivated tomato we eat today.
This “redomestication” in Mexico is unusual in the history of agriculture. The tomato populations that arrived in Mesoamerica had actually reverted to more wild-like traits during their northward migration, so Mexican growers essentially had to start the domestication process over. From Mexico, Spanish colonizers brought the tomato to Europe, where it eventually became inseparable from Italian cooking.
Chili Peppers, Vanilla, and Cacao
Chili peppers were domesticated in central-east Mexico, with the oldest remains found in dry caves in the states of Puebla and Tamaulipas. Genetic evidence points to the region spanning from Tamaulipas south through Veracruz and Hidalgo as the likely origin area. From this single domestication event came the enormous diversity of peppers eaten worldwide, from mild bell peppers to fiery habaneros.
Vanilla, another gift from Mesoamerica, comes from an orchid vine that Indigenous Totonac people of eastern Mexico first cultivated. It remains one of the most labor-intensive crops in the world, with each flower requiring hand-pollination in most growing regions outside Mexico.
Cacao, the raw ingredient of chocolate, originated in the Amazon basin of South America. Evidence of its use dates back 5,300 years in the southern Ecuadorian Amazon. From there, human trade networks carried it to the Pacific coast of Ecuador and eventually into Central America and Mesoamerica, where cultures like the Maya and Aztec turned it into ceremonial drinks. Genetic analysis of residues found in ancient ceramics shows that people were actively mixing cacao populations from distant regions as early as 5,000 years ago, creating new varieties adapted to different environments.
Squash, Pumpkins, and the Three Sisters
Five distinct species of squash were independently domesticated from wild gourds across the Americas. One species alone was domesticated twice: once in Mexico around 10,000 years ago (producing pumpkins and marrows) and once in eastern North America about 5,000 years ago (producing crooknecks, acorn squash, and scallop squash). By the time domesticated squash appeared in the eastern part of the continent, Mexican farmers had already been growing it for five millennia.
Squash was one third of the “Three Sisters,” the intercropping system used by Indigenous peoples across North America. Corn, beans, and squash were planted together in the same mound, each plant supporting the others. Corn stalks provided a structure for bean vines to climb. Beans fixed nitrogen in the soil, feeding the corn. Squash leaves shaded the ground, retaining moisture and suppressing weeds. Nutritionally, the three crops complemented each other as well: beans supplied the protein that corn lacked, while squash added antioxidants and other micronutrients.
Sunflowers, Berries, and Pecans
Not all American crops came from Mexico or South America. Eastern North America was its own independent center of plant domestication. The sunflower was domesticated roughly 5,000 years ago by Native Americans in the central Great Plains, who grew it primarily as a source of edible seeds. Genetic studies show that all modern cultivated sunflowers trace back to this single domestication event. The wild sunflower population that gave rise to cultivated varieties came from the central Great Plains region.
Cranberries, blueberries, and pecans are also native to North America. Cranberries are one of only three commercially grown fruits native to the continent (along with blueberries and Concord grapes). Indigenous peoples used cranberries in pemmican, a preserved food made with dried meat and fat, and in medicines. Blueberries grew wild across eastern North America and were eaten fresh, dried, and added to soups and stews long before European arrival.
Peanuts, Cassava, and Pineapple
Peanuts are native to South America, likely originating in the region spanning modern-day Bolivia, Paraguay, and northern Argentina. Despite their name, they are legumes, not nuts, and they were cultivated across South America and into Mesoamerica well before European contact.
Cassava, also called manioc, is a starchy root crop from South America that remains a primary calorie source for hundreds of millions of people in tropical regions of Africa, Asia, and Latin America. It thrives in poor soils and drought conditions, which made it an invaluable crop after Portuguese traders carried it from Brazil to West Africa in the 1500s.
Pineapple originated in South America and was already widely cultivated across the Caribbean and Central America when Columbus encountered it in 1493. It became one of the first American fruits to captivate European tastes, though growing it in cold climates required elaborate hothouses that made it a luxury symbol for centuries.
Turkeys: The Americas’ Domesticated Bird
The turkey is one of the very few animals domesticated in the Americas. Ancient DNA research has revealed that turkeys were domesticated at least twice independently: once in southern Mexico, where the South Mexican wild turkey gave rise to some modern domestic breeds, and once in the American Southwest, where a genetically distinct wild population was the ancestor. These two domestication events produced separate lineages that were later blended as turkeys spread across the continent and eventually to Europe.
Beyond turkeys, the Americas contributed relatively few domesticated animals compared to the Old World. Llamas and alpacas in South America, Muscovy ducks, and guinea pigs round out the short list. The abundance of plant domestication, however, more than made up for it. Taken together, crops originating in the Americas now account for a significant share of global food production, feeding billions of people who may never realize that their tomato sauce, french fries, and chocolate bar all trace back to the same hemisphere.