The history of the amendments to the Constitution is, in one sense, a history of the expansion of certain political freedoms, including voting. At the Founding of the United States, many groups, including landless white men, slaves, free blacks, and women, could not vote. Much has changed since then. Almost a third of the amendments added to the Constitution after the Bill of Rights was ratified concern the ability to vote. The Nineteenth Amendment gave the vote to women, while the Twenty-third, Twenty-fourth, and Twenty-sixth amendments gave representation to the District of Columbia, forbid poll taxes, and lowered the voting age to 18, respectively. The passage of each of these Amendments reflected a shift towards making voting a right of all citizens, and indeed a fundamental part of citizenship.