"Landmark cases" refer to significant legal decisions made by courts that establish important legal principles or change existing laws. These cases often address fundamental rights, social issues, or constitutional interpretations, influencing future legal rulings and societal norms. Examples include Brown v. Board of Education, which declared racial segregation in public schools unconstitutional, and Roe v. Wade, which addressed women's reproductive rights. Such cases are crucial in shaping the legal landscape, as they set precedents that lower courts must follow. Landmark cases often reflect the evolving values of society and can lead to legislative changes, impacting the lives of individuals and communities across the nation.