The Revenue Act refers to a series of laws enacted by the United States Congress to regulate taxation and generate government revenue. These acts often adjust tax rates, introduce new taxes, or modify existing tax structures to meet the financial needs of the government. One notable example is the Revenue Act of 1913, which re-established a federal income tax after the 16th Amendment was ratified. This act aimed to reduce tariffs and implement a progressive income tax system, where higher earners pay a larger percentage of their income in taxes, thereby addressing economic inequality.