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.
Source: Wikipedia — Economic history of the United States (CC BY-SA 4.0)