Sweden is a Scandinavian nation in Northern Europe. It shares borders with Norway to the west and north, Finland to the east, and Denmark to the southwest through a bridge-tunnel over the resund. Sweden is the biggest nation in Northern Europe, the third-largest country in the European Union, and the fifth largest country in Europe, with 450,295 square kilometers (173,860 square miles). Stockholm is the capital and biggest city. Sweden has the greatest population among the Nordic nations, with 10.4 million people, with a low population density of 25.5 residents per square kilometer (66/sq mi). Swedes reside in urban areas, which account for 87 percent of the total land area. The middle and southern halves of the nation have the largest concentration.
Sweden is located in the Fennoscandia region. Because of the substantial ocean impact, the climate is often moderate for its northern latitude. Despite its latitude, Sweden gets mild continental summers due to its location between the North Atlantic, the Baltic Sea, and massive Russia. Because of the huge latitudinal difference, the overall temperature and surroundings change drastically from south to north, and most of Sweden has consistently cold and snowy winters. The south of Sweden is mostly agricultural, but the north is heavily wooded and home to a section of the Scandinavian Mountains.
Since prehistoric times, Germanic peoples have inhabited Sweden, coming into history as the Geats (Swedish: Götar) and Swedes (Svear) and forming the sea peoples known as the Norsemen. During the early 12th century, Sweden became an independent state. After the Black Death in the middle of the 14th century destroyed nearly a third of the Scandinavian population, the Hanseatic League's supremacy in Northern Europe posed an economic and political danger to Scandinavia. This resulted in the formation of the Scandinavian Kalmar Union in 1397, from which Sweden withdrew in 1523. When Sweden joined the Protestant side in the Thirty Years' War, an expansion of its borders started, and the Swedish Empire was founded. Until the early 18th century, this was one of Europe's major powers. Swedish lands beyond the Scandinavian Peninsula were progressively lost over the 18th and 19th centuries, culminating in Russia's acquisition of modern-day Finland in 1809. Sweden was last actively engaged in a war in 1814 when Norway was forcibly forced into a personal union, which was amicably dissolved in 1905. Sweden has remained at peace since then, with an official policy of neutrality in international affairs. Sweden celebrated 200 years of peace in 2014, surpassing even Switzerland's peace record. Sweden was technically neutral throughout both World Wars and the Cold War, although Sweden has openly pushed toward NATO collaboration since 2009. Sweden declared its intention to bid for NATO membership in 2022.
Sweden is a constitutional monarchy and a parliamentary democracy, with the 349-member unicameral Riksdag wielding legislative authority. It is a unitary state comprised of 21 counties and 290 towns. Sweden maintains a Nordic social welfare system that provides its residents with universal health care and tertiary education. It boasts the world's tenth-highest per capita income and rates extremely high in terms of quality of life, health, education, civil rights protection, economic competitiveness, income equality, gender equality, prosperity, and human development. Sweden joined the European Union on January 1, 1995, but voted against joining the Eurozone in a referendum. It is also a member of the United Nations, Nordic Council, Council of Europe, World Trade Organization, and Organization for Economic Cooperation and Development (OECD).