The ghost culture of the north
For millennia, the Paleo-Eskimo people known as the Dorset culture dominated the North American Arctic. From roughly 2500 BCE to 1300 CE, they inhabited a vast territory from the western Arctic islands to Greenland. They were masters of a harsh environment, living in small, nomadic groups and subsisting on sea mammals like seals and walrus. Their technology was distinct. They used soapstone oil lamps called qulliq for heat and light, and hunted with harpoons tipped with unique triangular end-blades. Curiously, they lacked technologies common to both their predecessors and successors, such as the bow and arrow and bow-drills. Instead of drilling holes in bone needles, for instance, the Dorset painstakingly gouged them out.
Around 1000 CE, a new people appeared in the eastern Arctic: the Thule, migrating from Alaska. The Thule, who are the direct ancestors of modern Inuit, brought a different and more adaptive toolkit. They used large skin boats called umiaks, employed dog sleds for rapid travel, and hunted with the bow and arrow. This allowed them to hunt larger prey, including bowhead whales, and support bigger communities. Within a few centuries of the Thule's arrival, the Dorset culture vanished from the archaeological record. What happened to them remains a mystery that combines climate science, genetics, and Inuit oral history.
A disappearance with few clues
Several theories attempt to explain the Dorset's rapid disappearance. One possibility is climate change. The Thule arrived with the Medieval Warm Period (c. 950-1250 CE), which would have altered the sea ice patterns the Dorset depended on for hunting seals at their breathing holes. This environmental shift could have stressed their way of life to a breaking point while favoring the Thule's more flexible, open-water hunting strategies.
Another theory involves direct interaction. Inuit oral traditions tell of a people called the Tuniit (or Sivullirmiut, "the first inhabitants"), who are widely believed to have been the Dorset. These stories often describe the Tuniit as gentle giants who were strong but easily intimidated and driven away. Some accounts mention conflict, but most describe a people who avoided contact. This narrative of displacement is strongly supported by modern genetic research. Extensive analysis of ancient DNA from Paleo-Eskimo and Thule remains shows virtually no evidence of interbreeding. The Dorset people were a genetically distinct population that had been isolated for over 4,000 years. They were not absorbed by the Thule; they were replaced. The final cause could have been a combination of factors: Thule technological superiority, competition for resources during a period of climate flux, and perhaps new diseases to which the long-isolated Dorset had no immunity.