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The United States is a [http://en.wikipedia.org/wiki/Developed_country developed country] and has the world's largest national economy, with an estimated 2012 GDP of $15.6 trillion – 19% of global GDP at [http://en.wikipedia.org/wiki/List_of_countries_by_GDP_(PPP) purchasing-power parity], as of 2011. The per capita GDP of the U.S. was the world's sixth-highest as of 2010, although [http://en.wikipedia.org/wiki/Income_inequality_in_the_United_States America's income inequality] was also ranked highest among OECD countries by the [http://en.wikipedia.org/wiki/World_Bank World Bank]. The economy is fueled by an abundance of natural resources, a well-developed [[infrastructure]], and high productivity; and while its economy is considered post-industrial it continues to be one of the world's largest manufacturers. The country accounts for [http://en.wikipedia.org/wiki/List_of_countries_by_military_expenditures 39% of global military spending],  being the foremost economic and military power, a prominent political and cultural [[force]] in the world, and a [[leader]] in [[scientific]] [[research]] and technological [[innovation]].

The United States is a [http://en.wikipedia.org/wiki/Developed_country developed country] and has the world's largest national economy, with an estimated 2012 GDP of $15.6 trillion – 19% of global GDP at [http://en.wikipedia.org/wiki/List_of_countries_by_GDP_(PPP) purchasing-power parity], as of 2011. The per capita GDP of the U.S. was the world's sixth-highest as of 2010, although [http://en.wikipedia.org/wiki/Income_inequality_in_the_United_States America's income inequality] was also ranked highest among OECD countries by the [http://en.wikipedia.org/wiki/World_Bank World Bank]. The economy is fueled by an abundance of natural resources, a well-developed [[infrastructure]], and high productivity; and while its economy is considered post-industrial it continues to be one of the world's largest manufacturers. The country accounts for [http://en.wikipedia.org/wiki/List_of_countries_by_military_expenditures 39% of global military spending],  being the foremost economic and military power, a prominent political and cultural [[force]] in the world, and a [[leader]] in [[scientific]] [[research]] and technological [[innovation]].