1. Henry Clay designed the American System after the War of 1812 to enhance the nation's economy through a national bank, tariffs, and infrastructure projects like roads and canals. The system aimed to balance trade, industry, and agriculture. 2. In the early 1800s, the U.S. saw a transportation revolution with new roads, canals, railroads, and steamboats built, funded by taxes. These improved transportation networks allowed for more trade and easier travel compared to walking. 3. After the Civil War, two major industries were railroads and steel. Powerful businessmen who controlled these industries prospered due to their influence over getting the industries to cooperate rather than compete.