Final answer:
Judicial review allows courts to overturn unconstitutional laws and actions, impacting the legal system. Despite its significance in safeguarding rights, judicial review is controversial due to accusations of judicial activism.
Explanation:
Judicial review is the power of the courts to overturn laws or actions based on their constitutionality. The Supreme Court granted itself this power in Marbury v. Madison, establishing quasi-legislation and leading to accusations of judicial activism. While important to protect constitutional rights, judicial review has sparked controversy due to concerns of judges overstepping their roles and creating laws.
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