The American System was an economic plan proposed in the early 19th century with 3 main parts: 1) Establishing a national bank to issue a uniform currency, 2) Building new roads across states funded by the government to facilitate trade and transportation, and 3) Placing tariffs on imported goods to generate revenue to fund infrastructure projects and protect domestic industries. The system aimed to make the US economically self-sufficient. However, it was opposed by some groups like cotton farmers in the South as tariffs increased prices of imported goods and retaliatory foreign tariffs made their exports less competitive.