Before We Start
Why judicial review is genuinely foundational to constitutional law
Judicial review is the power of courts to declare a law unconstitutional and therefore void. Nearly every other topic in constitutional law — from the levels of scrutiny to landmark federalism cases — depends on this underlying power existing in the first place. Without judicial review, there would be no mechanism for courts to actually enforce constitutional limits on the other branches.
💡 The Genuinely Surprising Origin
Judicial review is NOT written anywhere in the text of the Constitution. Chief Justice John Marshall inferred it from the Constitution's underlying logical structure in Marbury v. Madison (1803) — a genuinely audacious act of judicial self-empowerment that has shaped American governance ever since.
The Reasoning
Marshall's logical chain, step by step
Premise 1
The Constitution is the supreme law of the land
This much is explicitly stated in the Constitution's own Supremacy Clause — not controversial or inferred.
Premise 2
Courts have the duty to interpret the law
Also a relatively uncontroversial premise — interpreting law is understood as a core judicial function.
Conclusion
Therefore, courts must be able to void laws that conflict with the Constitution
If the Constitution is supreme law, and courts interpret law, then when an ordinary statute conflicts with the Constitution, courts must have the authority to declare that statute void — otherwise the claim that the Constitution is "supreme" would be hollow.
💊 The elegance of Marshall's reasoning is exactly why it succeeded — each individual premise was hard to disagree with, but the combined conclusion granted the judiciary an enormous, previously unclaimed power.
Scope
What judicial review actually covers
Federal AND State Laws
Applies across all levels of government
Judicial review extends beyond federal statutes to state laws as well, particularly once the 14th Amendment applied constitutional constraints to state governments (see the Selective Incorporation lesson).
Policy-Making Power
A consequence worth naming directly
Because judicial review lets courts strike down laws passed by elected legislatures, it effectively gives the federal judiciary significant influence over policy outcomes — a genuinely important, sometimes controversial consequence of the power Marshall established.
⚖️ Applying the Concept — Recognizing Judicial Review in Action
A state legislature passes a law that a federal court later strikes down, ruling that the law violates the Equal Protection Clause of the 14th Amendment.
Identify
The court striking down this law is a direct exercise of judicial review — the specific power, established in Marbury v. Madison, to declare a law void because it conflicts with the Constitution. This everyday-sounding scenario is actually the practical application of the doctrine established over two centuries ago.
Trace the Underlying Authority
The court's authority to take this action doesn't come from an explicit constitutional grant of power — it traces back to Marshall's inferred reasoning, applied here to a state law via the 14th Amendment's extension of constitutional constraints to the states. Every modern instance of a court striking down a law rests on this same foundational, non-textual power.
📌 Exam Application
Judicial review questions test both the case name/date and Marshall's underlying logic:
Direct recall: "In which case, and what year, was judicial review established?" → Marbury v. Madison, 1803.
Logical structure: "What was Chief Justice Marshall's core argument for why courts must have the power of judicial review?" → Since the Constitution is supreme law and courts interpret law, courts must be able to void laws that conflict with the Constitution.
Textual basis: "Is judicial review explicitly written in the text of the Constitution?" → No — it was inferred by the Supreme Court itself.
⚠️ The Trap — Assuming Judicial Review Is Explicitly Granted by the Constitution
Because judicial review feels like such a fundamental, obvious feature of American government today, it's easy to assume it must be explicitly written into the Constitution somewhere. It isn't — this is one of the most important "created by interpretation, not text" facts in all of constitutional law.
The safeguard: Remember specifically that judicial review is a judicially-created doctrine, inferred from constitutional structure rather than granted by explicit constitutional text.
✓ Quick Self-Test
Answer before checking:
1. What case established judicial review, and in what year?
2. What are the two premises in Marshall's logical argument, and what conclusion do they lead to?
3. Is judicial review written in the text of the Constitution?
4. Does judicial review apply only to federal laws, or to state laws as well?
Answers:
1. Marbury v. Madison, 1803.
2. The Constitution is supreme law; courts interpret law; therefore courts must be able to void laws that conflict with the Constitution.
3. No — it was inferred by the Supreme Court, not explicitly granted by constitutional text.
4. Both federal and state laws.
Next Lesson
The 14th Amendment — DEEP
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