America's capitalist economy grew rapidly, becoming the largest in the world by the 1870s. During the 19th and 20th centuries, 37 new states were added to the original 13 as the nation expanded across the North American continent and acquired a number of overseas possessions. 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 cultural and intellectual influence worldwide, and in return is the target of the enemies of democracy and [[capitalism]]. | America's capitalist economy grew rapidly, becoming the largest in the world by the 1870s. During the 19th and 20th centuries, 37 new states were added to the original 13 as the nation expanded across the North American continent and acquired a number of overseas possessions. 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 cultural and intellectual influence worldwide, and in return is the target of the enemies of democracy and [[capitalism]]. |