How Tariffs Work and Their Ripple Effects on the Economy

2. How Tariffs Evolved from Revenue to Economic Strategy

Tariffs have shaped economies for centuries. In the 19th century, they were a major source of government revenue, funding public projects before income taxes were introduced. In the United States, Congress relied on tariffs as the primary source of federal income for much of its early history because it lacked the power to levy income taxes. This revenue supported public projects and government operations until income taxes were introduced in 1913.

During the Great Depression, tariffs were used to shield domestic industries. The Smoot-Hawley Tariff Act of 1930 aimed to protect U.S. farmers but reduced international trade, a pattern that shaped later agreements like NAFTA to prevent economic isolation.

Today, tariffs are more strategic. They influence trade policies and reflect the interconnected nature of modern economies.