1. Judicial Review: The case established the principle of judicial review, allowing the Supreme Court to declare laws passed by Congress unconstitutional. This solidified the Court's role as an independent branch of government, with the power to interpret and enforce the Constitution.
2. Original Jurisdiction: *Marbury v. Madison* was one of the first cases to address the issue of the Supreme Court's original jurisdiction, specifically whether it had the authority to issue writs of *mandamus* directly to government officials. While the Court ultimately found it did not have that power in this particular case, it did assert its power to interpret and declare laws unconstitutional.
3. Separation of Powers: The case highlighted the concept of separation of powers among the branches of government. The Court's decision emphasized the importance of each branch adhering to its constitutional roles and responsibilities.
4. Constitutional Supremacy: *Marbury v. Madison* reaffirmed the principle that the Constitution is the supreme law of the land, and any laws passed by Congress that conflict with the Constitution are invalid.
5. Precedent and Legitimacy: The decision set an important precedent for the Supreme Court's role as the ultimate arbiter of constitutional matters. It established the idea that the Court's decisions would carry legal weight and legitimacy, binding on all levels of government.
6. Impact on Constitutional Law: *Marbury v. Madison* laid the foundation for the Supreme Court's authority to interpret the Constitution and serve as a check on the other branches of government. This has been a fundamental principle in American constitutional law for over two centuries.