The Natives of Alaska's south, west, and north coasts settled in permanent villages due to innovations and requirements by the white colonialists, not because they preferred that lifestyle. They had been nomadic; coastal sites were merely seasonal (as many subsistence camps outside the villages still are). Cultural change has been very complex; however, a settled life was required by churches, schools-- and trading, which replaced game populations that firearms had decimated. Those who say "Just move, as people always have without problems" are referring to basically nomadic cultures (including many in Africa), not established settlements. A couple of books are: "The Eskimos of Bering Strait" (Ray, Univ. of Washington Press), and "The Native People of Alaska" (Langdon, Greatland Graphics); there are more recent ones.