What landmark case established the principle of Judicial Review in the United States?

The landmark case that established the principle of Judicial Review in the United States is Marbury v. Madison. This case, decided in 1803, was critical because it was the first time the Supreme Court declared an act of Congress unconstitutional, thereby asserting the Court's role as a check on legislative power. Judicial Review allows the judiciary to review the actions of the legislative and executive branches and determine their constitutionality, ensuring that no law or government action can infringe upon the rights enshrined in the Constitution. This principle has become a cornerstone of the American legal system, reinforcing the concept of checks and balances among the branches of government. The significance of this case extends beyond its immediate ruling, as it firmly established the judiciary's authority and set a precedent for future cases involving constitutional interpretation.