Eskimos are Indigenous peoples who have traditionally inhabited the circumpolar region from eastern Siberia, across Alaska , Canada, and Greenland.
There are two main groups that are referred to as Eskimo: Yupik and Inuit. A third group, the Aleut, is related. The Yupik language dialects and cultures in Alaska and eastern Siberia have evolved in place beginning with the original Eskimo culture that developed in Alaska. The earliest known Eskimo cultures were Pre-Dorset Technology, which appear to have been a fully developed Eskimo culture that dates to 5,000 years ago. They appear to have evolved in Alaska from people using the Arctic small tool tradition, who probably had migrated to Alaska from Siberia at least 2,000
to 3,000 years earlier; though they might have been in Alaska as far back as 10,000 to 12,000 years or more. There are similar artifacts found in Siberia going back to perhaps 18,000 years ago.
Today the two main groups of Eskimos are the Inuit of northern Alaska, Canada and Greenland, and the Yupik, comprising speakers of four distinct Yupik languages and originating in western Alaska, in South Central Alaska along the Gulf of Alaska coast, and in the Russian Far East.
In Alaska, the term Eskimo is commonly used, because it includes both Yupik and Inupiat, while Inuit is not accepted as a collective term or even specifically used for Inupiat. No universal replacement term for Eskimo, inclusive of all Inuit and Yupik people, is accepted across the geographical area inhabited by the Inuit and Yupik peoples. In Canada and Greenland, the term Eskimo has fallen out of favor , as it is considered Pejorative by the natives and has been replaced by the term Inuit .