Claim: The Dorset people, who descended from Inuits of the Pre-Dorset Culture, had a more successful economy and lived in more permanent houses built of snow and turf and heated with soapstone oil lamps.
Evidence: They displaced the related Dorset culture, called the Tuniit in Inuktitut, which was the last major Paleo-Eskimo culture. 
The Dorset was a Paleo-Eskimo culture, lasting from 500 BC to between AD 1000 and 1500, that followed the Pre-Dorset and preceded the Inuit in the Arctic of North America.