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The '''United States of America''' (commonly referred to as '''the United States''', '''the USA''', '''the US''', '''the States''', or simply as '''America''') is a North American nation that consists of a federal union of fifty individual states, along with territories and a capital district.  Founded originally as 13 colonies in the [[British Empire]], they united to become a nation on July 4, 1776 with the [[Declaration of Independence]]. After defeating Britain in the [[American Revolutionary War|War of Independence]], the U.S. expanded westward thanks to rapid growth from high birth rates, low death rates and high immigration from Europe, Africa (slaves) and Asia. It wrote a Constitution in 1787 that remains in effect today. and is based on [[republican]] political principles. The Americans created the world's first political parties and, since abolishing slavery in a bloody [[American Civil War|civil war]] in the 1860s, has been committed to democracy at home and abroad. Its capitalist economy grew rapidly, becoming the largest in the world by the 1870s. After defeating Communism in the [[Cold War]], the U.S. emerged as the world's only [[superpower]], boasting the largest economy and most powerful military. It exerts enormous cutural and intellectual influence worldwide, and in return is the target of the enemies of democracy and capitalism.

The '''United States of America''' (commonly referred to as '''the United States''', '''the USA''', '''the US''', '''the States''', or simply as '''America''') is a North American nation that consists of a federal union of fifty individual states, along with territories and a capital district.  Founded originally as 13 colonies in the [[British Empire]], they united to become a nation on July 4, 1776 with the [[Declaration of Independence]]. After defeating Britain in the [[American Revolutionary War|War of Independence]], the U.S. expanded westward thanks to rapid growth from high birth rates, low death rates and high immigration from Europe and  Africa (slaves). It wrote a Constitution in 1787 that remains in effect today and is based on [[republican]] political principles. The Americans created the world's first political parties, and, since abolishing slavery in a bloody [[American Civil War|civil war]] in the 1860s, has been committed to democracy at home and abroad. Its capitalist economy grew rapidly, becoming the largest in the world by the 1870s. After defeating Communism in the [[Cold War]], the U.S. emerged as the world's only [[superpower]], boasting the largest economy and most powerful military. It exerts enormous cutural and intellectual influence worldwide, and in return is the target of the enemies of democracy and capitalism.

==Overview==

==Overview==

The United States has land borders with [[Canada]] and [[Mexico]], as well as several territorial water boundaries with Canada, [[Russia]] and The Bahamas. It is otherwise bounded by the [[Pacific Ocean]], the Bering Sea, the Arctic Ocean, the Atlantic Ocean, the Gulf of Mexico, and the Caribbean Sea. Two of the fifty states, [[Alaska]], an exclave, and [[Hawaii]], an archipelago, are not contiguous with any of the other states. Alaska is located in northwest North America and the Hawaiian Islands in the Pacific Ocean. The United States also has a collection of overseas territories and possessions around the world. Each of the 50 states has a high level of local autonomy under the federal system.  

The United States has borders with [[Canada]] and [[Mexico]]. It is otherwise bounded by the [[Pacific Ocean]], the Bering Sea, the Arctic Ocean, the Atlantic Ocean, the Gulf of Mexico, and the Caribbean Sea. Two of the fifty states, [[Alaska]], an exclave, and [[Hawaii]], an archipelago, are not contiguous with any of the other states. Puerto Rico, which is largely self governing, is part of the U.S., as are several smaller territories in the Pacific Ocean, such as Guam. Each of the 50 states has a certain level of sovereignty under the federal system.  

At over 3.7 million square miles (over 9.6 million km²), the U.S. (including its non-contiguous and overseas states and territories) is the third largest country by total area. It is the world's third most populous nation, with over 350 million people.  

At over 3.7 million square miles (over 9.6 million km²), the U.S. (including its non-contiguous and overseas states and territories) is the third largest country by total area. It is the world's third most populous nation, with over 350 million people.  

==The Constitution and Politics in the United States==

==The Constitution and Politics in the United States==

[[Image:76485685i79.jpg|left|thumb|300px|The drafting committee presenting the [[Declaration of Independence]] to the [[Continental Congress]], painted by John Trumbull 1817–1819.]]

[[Image:76485685i79.jpg|left|thumb|300px|The drafting committee presenting the [[Declaration of Independence]] to the [[Continental Congress]], painted by John Trumbull 1817–1819.]]

Between 1776 and 1788, the United States was governed according to the [[Articles of Confederation]].  The Founding Fathers formally established the current structure of the United States by ratification of the [[U.S. Constitution]] in 1788.

Between 1776 and 1788, the United States was governed according to the [[Articles of Confederation]].  The [[Founding Fathers]] formally established the current structure of the United States by ratification of the [[U.S. Constitution]] in 1788. Since 1789, that constitution has been the basic governing document.  

Since then, that constitution has been the basic governing document.  

The U.S. is politically dedicated to [[republicanism]] with its commitment to civic virtue, and opposition to corrpution and aristocracy. The United States invented popular parties in the 1790s; currently the two major political parties are the [[Democratic Party]], and the [[Republican Party]]. Minor parties are of little importance.

The U.S. is politically dedicated to [[republicanism]] with its commitment to civic virtue, and opposition to corrpution and aristocracy. The United States invented popular parties in the 1790s; currently the two major political parties are the [[Democratic Party]], and the [[Republican Party]]. Minor parties are of little importance.