The Nineteenth Amendment (Amendment XIX) to the United States Constitution prohibits any United States citizen from being denied the right to vote on the basis of sex. It was ratified on August 18, 1920. The Constitution allows the states to determine the qualifications for voting, and until the 1910s most states disenfranchised women. The amendment was the culmination of the women's suffrage movement in the United States, which fought at both state and national levels to achieve the vote. It effectively overruled Minor v. Happersett, in which a unanimous Supreme Court ruled that the Fourteenth Amendment did not give women the right to vote.