The document provides historical context for the emergence of the market economy in the United States between 1815-1840. It describes the political and economic policies and events that helped establish conditions for a market system, including the American System, the Second Bank of the United States, protective tariffs, internal improvements like canals and roads, and key Supreme Court cases that supported contracts and interstate commerce. Westward expansion, new transportation networks, and the cotton gin also fueled economic growth and the spread of slavery during this period.