The ratification of the Twenty-second Amendment to the United States Constitution was a significant constitutional change, establishing a two-term limit for U.S. presidents. The impetus for this amendment stemmed largely from the unprecedented four-term presidency of Franklin D. Roosevelt, who served from 1933 until his death in 1945. Roosevelt's long tenure raised concerns about the implications of such extended executive power on American democracy.

The amendment was proposed by Congress on March 21, 1947, and it required ratification by three-fourths of the state legislatures to take effect. The debate on the amendment centered on the balance between democratic governance and the potential for a concentration of power in one individual. Supporters argued that term limits would prevent any one person from becoming too powerful, while opponents raised concerns about limiting the electorate's choice.

By February 27, 1951, the necessary 38 states had ratified the amendment, ensuring its adoption. This action transformed the political landscape and institutionalized the principle that no individual should hold the presidency for more than two consecutive terms, thereby promoting a healthy political succession and safeguarding democratic processes. The amendment has since shaped the expectations of presidential tenure in the United States.