The Revenue Act of 1913 was a significant piece of legislation in the United States that reintroduced a federal income tax after the 16th Amendment was ratified. This act aimed to reduce tariffs and provide a more equitable tax system by taxing higher incomes at graduated rates, which meant that wealthier individuals paid a larger percentage of their income in taxes. The act also lowered tariffs on imported goods, promoting trade and making products more affordable for consumers. Overall, the Revenue Act of 1913 marked a shift towards a more progressive tax system, reflecting the growing demand for economic reform during the early 20th century.