The History of Chili Peppers: From Wild American Berries to Global Tables

When Columbus arrived at a Caribbean island in 1492, he believed he had reached India.^[1] The pungent fruit he found there he called “Indian pepper.” That misconception echoes to this day — it is the reason the English word for chili is “pepper.” Yet the chili pepper has no botanical relationship whatsoever to black pepper (Piper nigrum). If black pepper is the fruit of a vine native to Southeast Asia, the chili is an entirely different plant that evolved independently on the American continent.

From this small misunderstanding began the most dramatic migration of a food ingredient in human history.

Origins in the Americas: A History of Over Ten Thousand Years

Plants of the genus Capsicum are estimated to have first grown wild in what is now Bolivia and Peru — specifically along the eastern foothills of the Andes.^[2] Genetic analysis studies identify this region as the diversity center for Capsicum, and in botany a diversity center typically coincides with a plant’s place of origin.

Human use of chili peppers in food reaches back at least 6,000 to 7,500 years.^[3] In 2007, a research team led by Dr. Linda Perry of the Smithsonian National Museum of Natural History published a landmark paper in Science. The team analyzed starch microfossils recovered from seven archaeological sites spanning the Caribbean islands to southern Peru, and demonstrated that chili peppers had been cultivated and traded across the Americas for more than 6,000 years.^[3] Previously, the perishable nature of chili peppers made archaeological evidence difficult to find, but starch microfossil analysis filled that gap.

Chili pepper remains dating to around 6,000 BCE have also been excavated from the Tehuacán Valley in Mexico, suggesting that chili peppers were domesticated independently throughout Central America.^[2] The genus Capsicum contains several species, each apparently domesticated separately in different regions. The earliest to be domesticated was C. baccatum, originating in Bolivia, while the most widely cultivated species today, C. annuum (which includes bell peppers, jalapeños, and serranos), is thought to have originated in central-eastern Mexico.^[4]

The Burn: The Science of Capsaicin and Its Evolutionary Purpose

The question of why chili peppers are hot seems simple, but the answer encapsulates the essence of evolutionary biology.

The culprit behind the heat is a chemical compound called capsaicin. Capsaicin is concentrated in the placental tissue of the chili fruit — the white fleshy interior where the seeds attach. When this compound contacts the mouth or skin of a mammal, it binds to TRPV1 receptors on nerve cells (ion channels that detect heat and pain), sending the brain a signal of “burning heat.”^[5] The body produces a burn response even though no actual rise in temperature has occurred.

The astonishing fact is that birds have a different TRPV1 receptor structure than mammals and show no reaction to capsaicin at all.^[6] A bird can eat the hottest chili and feel nothing. Mammals, by contrast, tend to crush chili seeds with their molars, preventing germination. From the plant’s perspective, the ideal seed disperser is a bird that swallows seeds whole and expels them intact, far away, through its digestive tract.

In other words, chili peppers are hot in order to repel mammals and attract birds. Capsaicin is a sophisticated seed-dispersal strategy shaped by millions of years of natural selection.^[6] This same chemical weapon that a plant manufactured to ward off mammals is, ironically, the very thing humans came to crave.

The concentration of capsaicin is measured using the Scoville Heat Unit scale (SHU), devised in 1912 by American pharmacist Wilbur Scoville.^[7] A standard bell pepper registers 0 SHU; a jalapeño ranges from about 2,500 to 8,000 SHU; pure capsaicin reaches 16 million SHU. As of 2023, the world’s hottest chili pepper is Pepper X, developed by Ed Currin, which set a Guinness World Record with an average rating of 2,693,000 SHU.^[7]

The Aztecs and Maya: A Sacred Ingredient

Chili peppers were far more than a spice. In Mesoamerican civilizations, they were a central resource for religious ritual, medicine, and the economy.

In the Aztec Empire (1300–1521), chili peppers were known by the Nahuatl word “chilli,” which is the direct etymological source of the English word “chili” today.^[8] The Aztecs used chili peppers as food, but also employed them in the torture of war captives — burning them to produce smoke that was forced into prisoners’ lungs or rubbed into their eyes. It was, in effect, an early form of chemical warfare.

Maya records also show chili peppers appearing alongside cacao beverages, demonstrating that the tradition of combining chocolate and chili — as seen in Mexican mole sauce today — has a history of thousands of years. Chili peppers were also important as trade goods; the Aztec Empire levied them as tribute from conquered territories.^[8]

Spanish conquistador Bernal Díaz del Castillo, in memoirs written in the 1520s, described encountering a variety of chili-spiced dishes at the court of Moctezuma II. The Aztec culinary culture combining tomatoes, squash, avocado, and chili is the prototype of Mexican cuisine as we know it today.

Columbus’s Mistake Changes History

In October 1492, Christopher Columbus discovered, on a Caribbean island (believed to be present-day Cuba or Hispaniola), a pungent fruit that the indigenous people used in their cooking.^[1] Convinced he had found the Indian spice trade route, he identified the fruit as “pepper” and recorded it in Spanish as “pimienta.” At the time, black pepper was so prized in Europe that it was called “black gold,” so in Columbus’s eyes this fiery fruit must have appeared economically promising.

This misnomer spread across all of Europe. The English “pepper,” the Portuguese “pimenta,” the German “Pfeffer” — all are names born from Columbus’s error in mistaking chili for pepper. Meanwhile, in the Americas where the plant originated, names derived from the Nahuatl “chilli” survived and are now used in parallel around the world.

Columbus brought chili seeds back to Spain on his return from the first voyage in 1493. In Spain, chili plants were initially grown as ornamental plants in aristocratic gardens, before gradually becoming known as a food ingredient. However, the spread of chili across the European mainland was slow. The primary route by which Europeans disseminated chili across the globe was not through Spanish colonies, but through Portugal’s maritime trade network.

Portuguese Trading Ships Carry the Fire

From the late 15th through the 16th century, Portugal — following Vasco da Gama’s pioneering of the India route in 1498 — built a vast maritime empire connecting Africa, India, and Southeast Asia. This trade network played a decisive role in the global diffusion of chili peppers.^[9]

From the late 1490s, Portuguese merchants transported chili peppers grown in Brazil to West and North Africa. Chili was rapidly absorbed into African culinary cultures already familiar with a wide variety of spices. It spread deep into the West African interior along slave trade routes, and became the foundation of the spicy food cultures that gave rise to Ethiopia’s berbere, West Africa’s jollof rice, and North Africa’s harissa, among others.^[9]

The spread to India also occurred through Portugal. Chili peppers arrived on the Indian subcontinent in the mid-16th century through Goa, Portugal’s trading hub in India.^[9] India at the time already had a sophisticated spice culture built on black pepper, ginger, and turmeric, yet within a matter of decades chili had displaced black pepper as the primary pungent spice in Indian cooking. Chili’s heat was more intense, its cultivation easier, and its price lower. Today India is one of the world’s largest producers and consumers of chili peppers.

Asia’s Adoption: Each Region’s Chili Culture

After Portuguese trading ships brought chili to Southeast Asia, each region absorbed this new ingredient into its culinary culture in its own distinctive way.

Thailand: Chili peppers arrived during the Ayutthaya Kingdom period in the 16th century, brought by Portuguese merchants.^[10] Thais combined chili with existing galangal, lemongrass, and coconut milk to create the foundation of Thai cuisine as it is celebrated worldwide today. In particular, the prik kee nu (bird’s eye chili), nicknamed “mouse-dropping chili,” is representative of the intense heat characteristic of Thai cooking.

Sichuan, China: The first appearance of chili peppers in Chinese texts dates to 1591. However, chili does not appear in records from Sichuan Province until 1749 — comparatively late.^[11] Chili is thought to have spread gradually from China’s eastern coast inward, likely introduced by sea via Portuguese trading ships. Sichuan cuisine combined chili with huajiao (Sichuan peppercorns) to give birth to the “mala” (numbing-hot) flavor, demonstrating that chili did not merely spread but underwent a kind of chemical reaction with existing culinary cultures to produce entirely new flavor systems.

Joseon Korea and East Asia: The route by which chili peppers reached the Korean peninsula remains a subject of scholarly debate. The traditional view holds that they arrived from Japan during the Japanese invasions of 1592, though some scholars dispute this account.^[12] Whatever the route, after the late 16th or early 17th century chili spread rapidly across the peninsula, and from the 18th century onward it became a core ingredient in gochujang and kimchi.

Europe’s Localization: The Birth of Paprika

In continental Europe too, chili peppers did not remain a mere imported spice. Nowhere is this more apparent than Hungary, where chili acquired an entirely new identity.

Chili peppers are believed to have reached Hungary via the Balkans in the 16th century, in the wake of Ottoman expansion.^[13] Over centuries, Hungarians selectively cultivated less pungent, more fleshy varieties, ultimately developing what we know today as “paprika” pepper. Dried and ground, paprika powder became the defining seasoning of Hungarian goulash and chicken paprikash, among other dishes.

A historically interesting observation is that the speed of chili adoption differed markedly between regions under Ottoman control and those that were not. In Hungary, Serbia, Bulgaria, and other areas in frequent contact with the Ottoman Empire, chili became a daily cooking ingredient early on, whereas much of Western Europe did not incorporate it seriously into cooking until after the 19th century.

Southern Italy’s Calabria is another European exception. Chili peppers entered through Italian coastal cities visited by Portuguese trading ships as early as the early 16th century, and today Calabrian nduja sausage and peperoncino dishes are unimaginable without chili.

Africa: Flames That Spread Along the Slave Trade Routes

In Africa, the spread of chili is intertwined with a tragic history. Portuguese slave traders carried chili as provisions during their journeys from the West African coast into the interior, and this became an important pathway for its spread across the continent.^[9]

One reason the African continent adopted chili so quickly is that, before its arrival, a rich culture of spice-blended cooking already existed. West African cuisine already relied on a wide variety of spices, and chili integrated naturally into that system. In the case of Ethiopia, records from Portuguese missionaries visiting in the mid-16th century make no mention of chili, but it begins to appear in texts from the early 17th century onward.^[9] This means that Ethiopia’s emblematic spice blend, berbere, reached its present form — incorporating chili — only in relatively recent history.

The Modern Chili: Variety Development and the Extreme Heat Competition

Since the 20th century, chili peppers have become more than a food ingredient — they are a cultural phenomenon. Competition to develop the “world’s hottest chili” has emerged primarily in the United States and Europe, and is rewriting the history of variety development.

From the 1990s, breeders in the United States, the United Kingdom, Australia, and elsewhere began developing extremely hot cultivars with the goal of securing Guinness World Record entries.^[7] Progressing through the Red Savina Habanero (1994), Naga Viper (2011), Trinidad Moruga Scorpion (2012), and Carolina Reaper (2013–2023), the current record is held by Pepper X, developed by Ed Currin.^[7]

This extreme heat competition reveals a fascinating paradox about human psychology and chili peppers. When capsaicin sends a pain signal to the brain, the brain releases endorphins that generate pleasure. The sense of well-being that follows eating spicy food is the brain’s response to protecting the body from what it perceives as pain — albeit a false one.^[5] Humans have taken the weapon a plant created to drive away mammals and repurposed it as an instrument of pleasure.

Capsaicin is also attracting attention in medicine. Topical analgesics that exploit the mechanism by which capsaicin binds to TRPV1 receptors are used clinically in the treatment of osteoarthritis, neuropathic pain, and muscle pain.^[5] Potential benefits for metabolic stimulation, anti-inflammatory effects, and cardiovascular health are also under investigation.^[14]

A World Table Transformed by Chili

The speed at which chili peppers spread around the world was extraordinary. Columbus introduced chili to Europe in 1493, yet within less than a century they had already become indispensable in Indian, Chinese, Southeast Asian, and African cooking. Historian Michael Krondl has called this “the fastest conquest of the world by any spice in history.”^[15]

Why did it spread so quickly? First, chili peppers are easy to cultivate and thrive wherever a tropical or subtropical climate prevails. Unlike black pepper, which can only be produced in specific regions, chili can be grown locally wherever it is needed. Beyond that, chili peppers have nutritional value: rich in vitamins A and C and inexpensive to grow, they were adopted rapidly among poorer populations in particular.

Chili also possessed the power to transform culinary culture from within. It did not simply occupy the niche of existing spices; it created entirely new flavor languages — as in Sichuan mala. Cooks in each region combined chili with their existing spices, techniques, and ingredients to create new food cultures.

Today, global chili pepper production exceeds 36 million tons per year — more than all other spices combined.^[16] Chili began as a wild plant growing in some tropical valley in Mexico and Central America, its seeds spread by birds. The chemical defense it developed to repel mammals has, thousands of years later, become the most widely consumed spice on earth. One could say the plant’s strategy has failed utterly — or, in another sense, that it has been a spectacular success. Thanks to humans, chili peppers now grow on every continent.