The
settlement of Iceland (
Icelandic:
landnámsöld) is generally believed to have begun in the second half of the ninth century, when
Norse settlers migrated across the
North Atlantic. The reasons for the migration are uncertain: later in the Middle Ages Icelanders themselves tended to cite civil strife brought about by the ambitions of the
Norwegian king
Harald I of Norway, but modern historians focus on deeper factors, such as a shortage of arable land in
Scandinavia. Unlike Britain and Ireland,
Iceland was unsettled land and could be claimed without conflict with existing inhabitants.