1. The Supreme Court ruled that the Constitution grants the federal government certain powers, and those powers are supreme over state laws.
2. The case established the principle of judicial review, giving the Supreme Court the authority to declare laws unconstitutional.
3. Chief Justice John Marshall wrote the opinion, asserting that it is the duty of the judiciary to say what the law is.
4. The decision reinforced the idea that the Constitution is the supreme law of the land and that federal laws made pursuant to it override conflicting state laws.
5. Marbury v. Madison was a landmark case because it defined the role of the judiciary in checking the other branches of government through constitutional interpretation.
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