The original inhabitants of North America were Indians. 16-18th century, the western European countries that were conducting primitive accumulation of capital invaded North America one after another. By the middle of18th century, 13 colonies had been established along the Atlantic coast of North America, with relatively mature economy, culture and politics. ?
After independence, the United States actively expanded its territory, and its territory gradually expanded from the Atlantic coast to the Pacific coast. Significant changes have taken place in the economy, and the north-south economy has developed in different directions. The contradiction between north and south is getting worse. From April 186 1 to April 1865, the war between the south and the north of the United States was also called the American civil war. In the end, the bourgeoisie led by the North won and unified the whole country. ?
After the Cold War, the United States became the only superpower in the world. However, the economic situation in the United States was relatively stable in the 1980s.
In 1990s, American computer industry developed rapidly, which promoted the global high-tech information industry and started a new generation of industrial revolution.
natural environment
The United States is the second largest country in the Americas, and its territory includes the mainland of the United States, Alaska in the northwest of North America and the Hawaiian Islands in the central Pacific Ocean.
It covers an area of 93726 10/0 square kilometers (including 9158,960 square kilometers of land and about 200,000 square kilometers of inland waters). If the U.S. sovereign part of the Great Lakes is included, the coastal waters such as estuaries, harbors and inland seas are about 170 square kilometers, with an area of 9.63 million square kilometers.