But it is the second Roosevelt who beyond all twentieth-century Presidents succeeded in affixing the stamp both of personality and of crisis upon the Presidency as it exists at this moment. In the solution of the problems of an economic crisis, "a crisis greater than war", he claimed for the National Government in general, and for the President in particular, powers which they had hitherto exercised only on the justification of war. Then when the greatest crisis in the history of our international relations arose, he imparted to the President's diplomatic powers new extension, now without consulting Congress, now with Congress's approval; and when at last we entered World War II, he endowed the precedents of both the War between the States and of World War I with unprecedented scope.[56]

It is timely therefore to inquire whether American Constitutional Law today affords the Court a dependable weapon with which to combat effectively contemporary enlarged conceptions of presidential power. Pertinent in this connection is the aforementioned recent action of the Court in Youngstown v. Sawyer disallowing presidential seizure of the steel industry. The net result of that Case is distinctly favorable to presidential pretensions, in two respects: First, because of the failure of the Court to traverse the President's finding of facts allegedly justifying his action, an omission in accord with the doctrine of Political Questions; secondly, the evident endorsement by a majority of the Court of the doctrine that, as stated in Justice Clark's opinion: "The Constitution does grant to the President extensive authority in times of grave and imperative national emergency".[57] That the Court would have sustained, as against the President's action, a clear-cut manifestation of congressional action to the contrary is, on the other hand, unquestionable. In short, if we are today looking for a check upon the development of executive emergency government, our best reliance is upon the powers of Congress, which can always supply needed gaps in its legislation. The Court can only say "no", and there is no guarantee that in the public interest it would wish to assume this responsibility.

IV

The Concept of Substantive Due Process of Law

A cursory examination of the pages of this volume reveals that fully a quarter of them deal with cases in which the Court has been asked to protect private interests of one kind or another against legislation, most generally state legislation, which is alleged to invade "liberty" or "property" contrary to "due process of law". How is this vast proliferation of cases, and attendant expansion of the Court's constitutional jurisdiction, to be explained? The explanation, in brief, is to be found in the replacement of the original meaning of the due process clause with a meaning of vastly greater scope. Judicial review is always a function, so to speak, of the viable Constitutional Law of a particular period.

From what has been previously said in this Introduction, it clearly appears that the Court's interpretation of the Constitution has involved throughout considerable lawmaking, but in no other instance has its lawmaking been more evident than in its interpretation of the due process clauses, and in no other instance have the state judiciaries contributed so much to the final result. The modern concept of substantive due process is not the achievement of any one American high court; it is the joint achievement of several—in the end, of all.[58]

The thing which renders the due process clause an important datum of American Constitutional Law is the role it has played first and last in articulating certain theories of private immunity with the Constitutional Document. The first such theory was Locke's conception of the property right as anterior to government and hence as setting a moral limit to its powers.[59] But while Locke's influence is seen to pervade the Declarations and Bills of Rights which often accompanied the revolutionary State Constitutions, yet their promise was early defeated by the overwhelming power of the first state legislatures, especially vis-a-vis the property right. One highly impressive exhibit of early state legislative power is afforded by the ferocious catalogue of legislation directed against the Tories, embracing acts of confiscation, bills of pains and penalties, even acts of attainder. A second exhibit of the same kind is furnished by the flood of paper money laws and other measures of like intent which the widespread debtor class forced through the great majority of the state assemblies in the years following the general collapse of values in 1780.

The most important reaction of the creditor interest to this course of legislation was its energetic part in bringing about the Philadelphia Convention. Closer, however, to our purpose is the leadership taken by the new federal judiciary in asserting the availability against predatory state legislation of extra-constitutional principles sounding in Natural Law. In 1795 Justice Paterson of the new Supreme Court admonished a Pennsylvania jury that to construe a certain state statute in a way to bring it into conflict with plaintiff's property rights would render it void. "Men," said he, "have a sense of property.... The preservation of property ... is a primary object of the social compact".[60] Three years later, Justice Chase proclaimed from the Supreme Bench itself, with characteristic emphasis, his rejection of the idea that state legislative power was absolute unless its authority was "expressly restrained" by the constitution of the State.[61] He too was thinking primarily of the rights of property.