The highly complex character of a system in which the duties and rights of the citizen are thus governed by distinct sovereignties, would seem to render the administration of the central power--surrounded as it is by jealous and vigilant local governments--an exceedingly difficult and delicate task. Its situation is without an exact parallel in any other country in the world. But it possesses the means which no government of a purely federal character has ever enjoyed, of an exact determination by itself of its own powers; because every conflict between its authority and the authority of a State may be made a judicial question, and as such is to be solved by the judicial department of the nation. This peculiar device has enabled the government of the United States to act successfully and safely. Without it, each State must have been left to determine for itself the boundaries between its own powers and those of the Union; and thus there might have been as many different determinations on the same question as the number of the States. At the same time, this very diversity of interpretation would have deprived the general government of all power to enforce, or even to have, an interpretation of its own. Such a confused and chaotic condition had marked the entire history of the Confederation. It was terminated with the existence of that political system, by the establishment of the rule which provides for the supremacy of the Constitution of the United States, and by making one final arbiter of all questions arising under it.