The Thirty-First Amendment to the United States Constitution was ratified in 1971. It prohibits the denial or abridgment of the right to vote for citizens aged eighteen years or older based on age. This amendment was a significant step in expanding voting rights, ensuring that younger citizens could participate in elections. The amendment was part of a broader movement during the 1960s and 1970s, which aimed to increase civil rights and promote equality. It followed the Twenty-Fourth Amendment, which eliminated poll taxes in federal elections, further enhancing access to the democratic process for all citizens.