The U.S. Constitution is often described as a “living document,” reflecting the nation’s ability to adapt and evolve over time. From its ratification, Americans recognized that change would be necessary to address new challenges and ideals. Amendments have played a pivotal role in this evolution, redefining justice, liberty, and equality for each generation. Certain amendments stand out for their profound, lasting impact—reshaping society, expanding rights, and cementing foundational legal principles. This article explores twelve historic amendments whose legacies continue to influence American life and law today.