August 14, 2022

The United States of America (English: United States of America), or in abbreviated form the United States (English: United States), in Swedish usually called the United States or America, is a federal republic consisting of 50 states, a federal district and several different self-governing areas. The forty-eight contiguous states and the federal district, Washington, D.C., are located in North America between Canada and Mexico. The state of Alaska is located in the northwestern part of the North American continent and the state of Hawaii is an island group in the central Pacific Ocean. The country also has five populated and nine unpopulated territories in the Pacific Ocean and the West Indies. With 9.83 million km2 and with over 328 million inhabitants, the USA is the third largest country by total area, and the third largest by population. The United States is one of the world's most ethnically mixed and multicultural nations, due to large-scale immigration from many countries. The geography and climate of the United States is also very diverse, and the country is home to a large amount of native wildlife. Paleoindians migrated from Asia to what is now the American mainland about 15,000 years ago. European colonization began in the 16th century. Part of the area that later came to make up the United States was initially thirteen British colonies along the Atlantic coast. Disputes between Great Britain and these colonies led to the American Revolution. On July 4, 1776, delegates from the 13 colonies unanimously issued the Declaration of Independence. The ensuing war ended in 1783 in recognition of the independence of the United States from the Kingdom of Great Britain, and was the first successful war of independence against a European colonial empire. The current constitution was adopted on September 17, 1787. The first ten constitutional amendments, collectively known as the Bill of Rights, were ratified in 1791 and guarantee many basic civil liberties and rights. Driven by the doctrine of manifest destiny, the United States began a vigorous expansion across North America throughout the 19th century. This involved the displacement of Native American tribes, the acquisition of new territories, and the gradual recognition of new states. The American Civil War ended legal slavery in the country. At the end of the 19th century, the United States expanded into the Pacific Ocean, and its economy became the world's largest. The Spanish-American War and World War I confirmed the country's status as a global military power. After World War II, the United States gained the status of a global superpower, the first country with nuclear weapons and a permanent member of the UN Security Council. The end of the Cold War and the dissolution of the Soviet Union left the United States as the world's only superpower. The United States is an industrialized country and has the world's largest national economy, with an estimated 2013 GDP of $16.7 trillion – 27 percent of global nominal gross domestic product and 19 percent of world GDP at purchasing power parity. The economy benefits from vast natural resources and the country has the world's highest productivity, with GDP per capita the world's sixth highest in 2010. While the US economy is considered post-industrial, the country continues to be one of the world's largest manufacturers. The United States has the highest average and second-highest median household income in the OECD and the highest average wage, while ranking fourth among OECD countries with the most unequal income distribution, with 12.7% of the population living in poverty. The country accounts for 39% of global military spending and is the world's leading economic and military power, a prominent political and cultural force, and a leader in scientific research and technological innovation. However, the country faces major economic problems, as the national debt and budget deficit under long time increased. The budget deficit is expected to grow to new levels, as a result of the