Tariffs, as a form of taxes on imported goods, have a long history, with evidence of their use in ancient Greece and Rome, and they evolved into protective measures for industries in medieval Europe. The first major law passed by the First Congress in the United States in 1789 dealt with tariffs, and they quickly became a main source of revenue for the federal government. 

Tariffs, as a form of taxes on imported goods, have a long history, with evidence of their use in ancient Greece and Rome, and they evolved into protective measures for industries in medieval Europe. The first major law passed by the First Congress in the United States in 1789 dealt with tariffs, and they quickly became a main source of revenue for the federal government. 

Tariffs, as a form of taxes on imported goods, have a long history, with evidence of their use in ancient Greece and Rome, and they evolved into protective measures for industries in medieval Europe. The first major law passed by the First Congress in the United States in 1789 dealt with tariffs, and they quickly became a main source of revenue for the federal government.