"EQUAL JUSTICE UNDER LAW"-These words, written above the main entrance to the Supreme Court Building, express the ultimate responsibility of the Supreme Court of the United States. The Court is the highest tribunal in the Nation for all cases and controversies arising under the Constitution or the laws of the United States. As the final arbiter of the law, the Court is charged with ensuring the American people the promise of equal justice under law and, thereby, also functions as guardian and interpreter of the Constitution.

The Supreme Court is "distinctly American in concept and function," as Chief Justice Charles Evans Hughes observed. Few other courts in the world have the same authority of constitutional interpretation and none have exercised it for as long or with as much influence. A century and a half ago, the French political observer Alexis de Tocqueville noted the unique position of the Supreme Court in the history of nations and of jurisprudence. "The representative system of government has been adopted in several states of Europe," he remarked, "but I am unaware that any nation of the globe has hitherto organized a judicial power in the same manner as the Americans. . . . A more imposing judicial power was never constituted by any people."

The unique position of the Supreme Court stems, in large part, from the deep commitment of the American people to the Rule of Law and to constitutional government. The United States has demonstrated an unprecedented determination to preserve and protect its written Constitution, thereby providing the American "experiment in democracy" with the oldest written Constitution still in force.

The Constitution of the United States is a carefully balanced document. It is designed to provide for a national government sufficiently strong and flexible to meet the needs of the republic, yet sufficiently limited and just to protect the guaranteed rights of citizens; it permits a balance between society’s need for order and the individual’s right to freedom. To assure these ends, the Framers of the Constitution created three independent and coequal branches of government. That this Constitution has provided continuous democratic government through the periodic stresses of more than two centuries illustrates the genius of the American system of government.

The complex role of the Supreme Court in this system derives from its authority to invalidate legislation or executive actions which, in the Court’s considered judgment, conflict with the Constitution. This power of "judicial review" has given the Court a crucial responsibility in assuring individual rights, as well as in maintaining a "living Constitution" whose broad provisions are continually applied to complicated new situations.

While the function of judicial review is not explicitly provided in the Constitution, it had been anticipated before the adoption of that document. Prior to 1789, state courts had already overturned legislative acts which conflicted with state constitutions. Moreover, many of the Founding Fathers expected the Supreme Court to assume this role in regard to the Constitution; Alexander Hamilton and James Madison, for example, had underlined the importance of judicial review in the Federalist Papers, which urged adoption of the Constitution.

Hamilton had written that through the practice of judicial review the Court ensured that the will of the whole people, as expressed in their Constitution, would be supreme over the will of a legislature, whose statutes might express only the temporary will of part of the people. And Madison had written that constitutional interpretation must be left to the reasoned judgment of independent judges, rather than to the tumult and conflict of the political process. If every constitutional question were to be decided by public political bargaining, Madison argued, the Constitution would be reduced to a battleground of competing factions, political passion and partisan spirit.