The 'traditional' view is that, in the 4th or 5th century, Goidelic language and Gaelic culture was brought to Scotland by settlers from Ireland, who founded the Gaelic kingdom of Dál Riata on Scotland's west coast. This is based mostly on medieval writings from the 9th and 10th centuries. The archaeologist Ewan Campbell argues against this view, saying that there is no archeological or placename evidence for a migration or a takeover by a small group of elites. He states that "the Irish migration hypothesis seems to be a classic case of long-held historical beliefs influencing not only the interpretation of documentary sources themselves, but the subsequent invasion paradigm being accepted uncritically in the related disciplines of archaeology and linguistics." Dál Riata and the territory of the neighbouring Picts merged to form the Kingdom of Alba, and Goidelic language and Gaelic culture became dominant there. The country came to be called "Scotland", after the Roman name for the Gaels: "Scoti". The Isle of Man and the Manx people also came under massive Gaelic influence in their history.