Pigs were domesticated independently in at least two places: eastern Anatolia (modern-day Turkey) around 10,500 years ago, and China around 8,000 to 9,000 years ago. Both events involved the same wild ancestor, the Eurasian wild boar, whose native range stretched across northern Africa, Europe, and Asia. That single species gave rise to virtually every domestic pig breed alive today.
The Wild Boar: A Species Built to Spread
The wild boar (Sus scrofa) is one of the most widely distributed large mammals on Earth. Its native range covered an enormous swath of territory, from the forests of Western Europe and North Africa through the Middle East and across temperate and tropical Asia. Wild boars are adaptable omnivores that thrive in forests, wetlands, grasslands, and scrubland, which helps explain why humans in very different parts of the world independently began managing them.
First Domestication in the Near East
The earliest known pig domestication happened in eastern Anatolia, part of the broader Fertile Crescent region, during the ninth millennium BC. This is the same area where humans first domesticated wheat, barley, sheep, and goats. As communities became more settled and started farming crops, wild boars were drawn to the food waste and stored grain around human villages. Over generations, people began actively managing these animals, selecting for ones that were easier to handle and keep in close quarters.
When early Neolithic farmers began migrating westward into Europe starting around 7,000 years ago, they brought their domestic pigs with them. But what happened next is one of the more surprising chapters in domestication history. Those Near Eastern pigs interbred extensively with local European wild boars, and within about 3,000 years, the Near Eastern genetic signature had almost completely vanished. European domestic pigs dating to around 7,000 years ago carried a clear mix of Near Eastern and European ancestry, but by 5,000 years ago, Near Eastern DNA had dropped below 50%. Modern European pig breeds retain only 0 to 4% Near Eastern ancestry. In other words, the concept of domestic pig keeping traveled from the Near East, but the genes were almost entirely replaced by European wild boar lineages through continuous crossbreeding.
Independent Domestication in China
China was a separate and equally important center of pig domestication. Sedentary communities emerged in both the Yellow River Valley in northern China and the Yangtze River Valley in the south by around 11,000 years ago, creating the conditions for humans and wild boars to develop closer relationships. Archaeological evidence from Neolithic sites in both regions shows that pig management had begun by roughly 9,000 to 8,000 years ago, with the process possibly starting independently in multiple locations across China.
Recent work on sites in the Lower Yangtze provides some of the clearest evidence, showing that pig domestication there had begun by 8,000 years ago. This happened alongside the development of rice farming and more permanent settlements, suggesting the same broad pattern seen in the Near East: agriculture and pig keeping evolved together. The pace of physical changes in pigs differed between northern and southern China, which supports the idea that domestication wasn’t a single event but rather a slow, parallel process unfolding across a wide geographic area.
A Possible Third Origin in Indonesia
Most domestic pigs descend from the Eurasian wild boar, but there is a longstanding and intriguing claim for a separate domestication involving a different species entirely. The Sulawesi warty pig, native to the Indonesian island of Sulawesi, may have been independently managed by pre-agricultural human populations. If true, this would make it one of only a handful of animals (alongside wolves) domesticated by hunter-gatherers rather than farming communities.
Archaeological evidence places warty pigs alongside humans on Sulawesi as far back as 45,000 years ago, and cave art on the island depicts human figures hunting them with spears or ropes. The proposed scenario is that foragers captured wild piglets and raised them as companions, gradually changing their behavior and reproduction over many generations. This wouldn’t have produced a fully domestic breed in the way Near Eastern or Chinese processes did, but it represents a deep and complex human-pig relationship that predates agriculture by tens of thousands of years.
How Domestication Changed the Pig
The transformation from wild boar to domestic pig involved substantial physical changes. Wild boars are lean, long-legged, and covered in coarse bristly hair. They have elongated snouts, prominent tusks, and relatively large brains for their body size. Domestic pigs, by contrast, tend to be rounder, shorter-legged, and far more variable in coat color and texture. Their snouts are typically shorter, and their tusks are reduced.
Some of these changes go deeper than appearance. Comparative studies of pig and wild boar brains have found that domestic pigs have less white matter in the cerebellum and differences in a type of brain cell involved in motor control and cognition. These findings suggest that domestication reduced certain cognitive and motor functions, likely because pigs living in managed environments no longer needed the same alertness, spatial awareness, and physical agility required to survive in the wild. One trait that did persist from the Near East even as the rest of the genome was replaced in Europe: coat color. Genes controlling the distinctive coloring of domestic pigs appear to have been actively maintained by human selection even as wild boar genes flooded back in through interbreeding.
How Pigs Reached the Rest of the World
Pigs spread across much of the Old World through a combination of farmer migration and trade. From the Near East, domestic pigs moved into Europe with Neolithic farming communities beginning around 7,000 years ago. Chinese domestic pigs spread throughout East and Southeast Asia along similar pathways tied to agricultural expansion. By the medieval period, pigs were a staple livestock animal across Europe and Asia.
The Americas had no domestic pigs until European contact. Columbus introduced European pigs to the Caribbean on his first voyage in 1492, and Spanish and Portuguese explorers brought them to the mainland shortly after. Some of those animals escaped or were released, founding feral populations that still exist today across the Americas. Australia and New Zealand similarly received their first pigs through European colonization in the 18th and 19th centuries.
The global pig population now exceeds one billion, with China raising nearly half of them. Every commercial breed, from the Large White to the Berkshire to the Meishan, traces back to those two original domestication events in the Near East and China, sometimes with genetics from both lineages blended together through centuries of crossbreeding and selective breeding.