Final answer:
Judicial review's origin and purpose lie in the landmark case of Marbury v. Madison, establishing the courts' authority to nullify unconstitutional laws.
Explanation:
Judicial review is the power of the courts to overturn laws or other actions based on their constitutionality. This principle was established in the Supreme Court case of Marbury v. Madison in 1803, allowing the judiciary branch to check the constitutionality of laws passed by Congress and the states.
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