Economic history of the United States

The economic history of the United States spans the colonial era through the 21st century. The initial settlements depended on agriculture and hunting/trapping, later adding international trade, manufacturing, and finally, services, to the point where agriculture represented less than 2% of GDP. Until the end of the Civil War, slavery was a significant factor in the agricultural economy of the southern states, and the South entered the second industrial revolution more slowly than the North. The US has been one of the world's largest economies since the McKinley administration.