Which amendment guaranteed women's suffrage?

The 19th Amendment to the United States Constitution is the amendment that guaranteed women the right to vote, effectively prohibiting any U.S. citizen from being denied the right to vote on the basis of sex. Ratified in 1920, this significant change was the culmination of decades of activism by women's suffrage movements, which fought for equal voting rights for women.

The inclusion of this amendment marked a pivotal moment in American history, as it enfranchised half of the population and acknowledged women's contributions to society that had been long overlooked in the political sphere. The passage of the 19th Amendment was a critical step in the broader struggle for gender equality and access to basic civil rights, aligning with the fundamental principle of democracy that every citizen should have a voice in government.

In contrast, the other amendments mentioned address different issues: the 15th Amendment focuses on voting rights regardless of race, the 24th Amendment eliminates poll taxes for federal elections, and the 26th Amendment lowers the voting age to 18. Each of these amendments serves important roles in the history of voting rights, but none directly pertains to women's suffrage like the 19th Amendment does.