Papuans in New Guinea domesticate sugarcane, sweetening the world forever

Story: 8000 B.C.E.  |  Last updated: January 9, 0001

Around 4000 B.C.E., in the lush highlands and coastal lowlands of what is now New Guinea, Papuan farmers began doing something no one had done before: deliberately selecting and cultivating wild sugarcane. It was an act of agricultural invention that would, over millennia, quietly reshape the taste, trade, and social fabric of the entire world.

What the evidence shows

• Sugarcane domestication: Papuans selectively bred Saccharum officinarum from the wild species Saccharum robustum, beginning around 4000 B.C.E. — making New Guinea the primary center of origin for the world’s most widely consumed sweetener.
• Saccharum officinarum origins: New Guinea remains the modern center of diversity for this species, meaning the genetic fingerprints of that original domestication are still traceable in sugarcane crops grown across the tropics today.
• Early sugarcane use: Before it became a source of sweetness for humans, domesticated cane in New Guinea was used primarily as feed for pigs — a reminder that agriculture often begins with purposes very different from its eventual legacy.

Two centers, one plant

New Guinea was not the only place humans were independently developing a relationship with sugarcane. In Taiwan and southern China, Austronesian peoples were cultivating a separate species, Saccharum sinense, from at least 3500 B.C.E. The word for sugarcane can even be reconstructed in Proto-Austronesian languages — evidence of just how central the plant was to those cultures’ identity and economy.

These two independent lineages eventually merged. As Austronesian voyagers expanded across Island Southeast Asia, they encountered the Papuan-domesticated S. officinarum. The two species hybridized, and the sweeter, hardier result spread further — east into Polynesia and Micronesia, west toward India and China.

The Austronesian maritime network, one of the most extraordinary examples of prehistoric seafaring, acted as a living distribution system for the plant. Sugarcane traveled as a canoe plant — carried deliberately by voyagers who understood its value and wanted it wherever they settled.

From pig food to civilization-shaping crop

The leap from pig fodder to global commodity took thousands of years and many hands. India became the first civilization to refine cane juice into granulated crystals — a process developed around 350 C.E. that made sugar portable, tradeable, and storable. The Sanskrit word for these crystals, khanda, became the origin of the English word “candy.”

Buddhist monks carried crystallization techniques to China. Indian envoys taught sugarcane cultivation methods to Tang Dynasty officials after Emperor Taizong expressed personal interest in the crop. Arab traders and scholars spread it across the Middle East and into the Mediterranean. By the time Crusaders encountered caravans carrying what they called “sweet salt” in the Holy Land, sugar had already traveled halfway around the world from its New Guinea origins.

Each leg of that journey involved real human knowledge transfer — farmers, monks, sailors, traders, and botanists passing techniques across language barriers and political borders. The story of sugarcane is, in miniature, the story of how human civilizations have always learned from each other.

Lasting impact

It is difficult to overstate how much the domestication of sugarcane shaped the modern world. The spice trade routes that carried sugar west helped drive European maritime expansion. Sugar’s economic value fueled demand that would eventually lead to the brutal plantation system of the Atlantic slave trade — one of history’s most consequential and catastrophic consequences of a single crop’s commercial success.

On the scientific side, the genetics of sugarcane remain one of the most complex of any crop plant, in part because of those ancient hybridization events between the Papuan and Austronesian varieties. Modern plant breeders still work with that genetic diversity today, developing disease-resistant and high-yield cultivars for farmers across the tropics.

Sugar also transformed medicine, food preservation, confectionery, and fermentation. It became a currency of hospitality and celebration across cultures from West Africa to Japan. The word itself — from Sanskrit śarkarā, meaning “grit” or “gravel” — traveled through Persian, Arabic, Greek, and Latin before arriving in English, carrying thousands of years of human exchange in its etymology.

Blindspots and limits

The archaeological record for plant domestication in New Guinea and across Island Southeast Asia remains thinner than for better-excavated regions like the Fertile Crescent or Mesoamerica. The 4000 B.C.E. date for S. officinarum domestication is the current best estimate based on genetic and linguistic evidence rather than direct archaeobotanical finds, and future excavations may refine it. The deeper story of Papuan agricultural knowledge — who the individuals and communities were, what other plants they cultivated alongside sugarcane, what social structures supported their farming — is largely invisible to us, a gap that reflects how unevenly the world has invested in understanding the full scope of human agricultural history.

And it would be incomplete not to acknowledge that the crop those Papuan farmers first cultivated eventually became the economic engine of one of the most violent and dehumanizing systems in recorded history. The Atlantic sugar trade’s reliance on enslaved African labor killed and brutalized millions — a reality that sits alongside the genuine wonder of the original discovery.

A sweetness that began in the highlands

What those early Papuan farmers almost certainly could not have imagined is the chain of consequences their careful selection of a wild grass would set in motion. They were feeding pigs, improving a useful plant, working within an agricultural tradition whose depth and sophistication archaeologists are only now beginning to fully appreciate.

New Guinea has one of the oldest continuous agricultural histories on Earth — research suggests farming in its highlands may date back 10,000 years or more — and the domestication of sugarcane was one expression of that deep knowledge. The Papuan peoples who first cultivated S. officinarum belong in any honest account of the crops that built the modern world.

Their plant still grows on every continent that can support it. It still sweetens billions of cups of tea and coffee every morning. The lineage runs unbroken from a highland garden in New Guinea, more than six thousand years ago, to today.

Read more

For more on this story, see: Wikipedia — History of sugar

For more from Good News for Humankind, see:

• Ghana creates a new marine protected area at Cape Three Points
• Indigenous land rights: 160 million hectares secured ahead of COP30
• The Good News for Humankind archive on prehistory

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