Judicial review provides the judiciary with the authority to examine laws or executive actions to determine their constitutionality. This power is crucial for maintaining the rule of law and checks and balances within the federal government. A landmark case that established and defined judicial review is Marbury v. Madison (1803). This case not only affirmed the Supreme Court’s role as a key arbiter in constitutional interpretation but also underscored the judiciary's ability to limit the powers of the other branches of government. Understanding the implications and outcomes of this decision is essential for grasping the role of judicial review in American governance.