Norway (Norwegian: Norge (Bokmål) or Noreg (Nynorsk)), officially the Kingdom of Norway, is a Scandinavian unitary constitutional monarchy whose territory comprises the western portion of the Scandinavian Peninsula, Jan Mayen, the Arctic archipelago of Svalbard and the subantarctic Bouvet Island. The Spitsbergen Treaty (also known as the Svalbard Treaty) of February 9, 1920, recognizes the full and absolute sovereignty of Norway over the arctic archipelago of Spitsbergen (now called Svalbard). Peter I Island is dependent territory (Norwegian: biland) of Norway but is not considered part of the Kingdom. Norway also lays claim to a section of Antarctica known as Queen Maud Land. Norway has a total area of 385,252 square kilometres (148,747 sq mi) and a population of about 5 million. It is the second least densely populated country in Europe. The majority of the country shares a border to the east with Sweden; its northernmost region is bordered by Finland to the south and Russia to the east; in its south Norway borders the Skagerrak Strait across from Denmark. The capital city of Norway is Oslo. Norway's extensive coastline, facing the North Atlantic Ocean and the Barents Sea, is home to its famous fjords.
Two centuries of Viking raids tapered off following the adoption of Christianity by King Olav Tryggvason in 994. A period of civil war ended in the 13th century when Norway expanded its control overseas to parts of Britain, Ireland, Iceland, and Greenland. Norwegian territorial power peaked in 1265, but competition from the Hanseatic League and the spread of the Black Death weakened the country. In 1380, Norway was absorbed into a union with Denmark that lasted more than four centuries. In 1814, Norwegians resisted the cession of their country to Sweden and adopted a new constitution. Sweden then invaded Norway but agreed to let Norway keep its constitution in return for accepting the union under a Swedish king. Rising nationalism throughout the 19th century led to a 1905 referendum granting Norway independence. Although Norway remained neutral in World War I, it suffered heavy losses to its shipping. Norway proclaimed its neutrality at the outset of World War II, but was nonetheless occupied for five years by the Third Reich. In 1949, neutrality was abandoned and Norway became a founding member of NATO. Discovery of oil and gas in adjacent waters in the late 1960s boosted Norway's economic fortunes. In referenda held in 1972 and 1994, Norway rejected joining the EU. Key domestic issues include immigration and integration of ethnic minorities, maintaining the country's extensive social safety net with an aging population, and preserving economic competitiveness.
Norway is a unitary parliamentary democracy and constitutional monarchy, with King Harald V as its head of state and Erna Solberg as its prime minister. It is a unitary state with administrative subdivisions on two levels known as counties (fylke) and municipalities (kommuner). The Sámi people have a certain amount of self-determination and influence over traditional territories through the Sámi Parliament and the Finnmark Act. Although having rejected European Union membership in two referenda, Norway maintains close ties with the union and its member countries, as well as with the United States. Norway remains one of the biggest financial contributors to the United Nations, and participates with UN forces in international missions, notably in Afghanistan, Kosovo, Sudan and Libya. Norway is a founding member of the United Nations, NATO, the Council of Europe, and the Nordic Council; a member of the European Economic Area, the WTO, and the OECD; and is also a part of Schengen Area.
Norway has extensive reserves of petroleum, natural gas, minerals, lumber, seafood, fresh water, and hydropower. The country has the fourth-highest per capita income in the world. On a per-capita basis, it is the world's largest producer of oil and natural gas outside the Middle East, and the petroleum industry accounts for around a quarter of the country's gross domestic product. The country maintains a Nordic social benefit model with universal health care, subsidized higher education, and a comprehensive social security system. From 2001 to 2006, and then again from 2009 through 2011, Norway has had the highest human development index ranking in the world. In 2011, Norway also ranked the highest on the Democracy Index.