In short, the substantive doctrine of due process of law does not today support judicial intervention in the field of social and economic legislation in anything like the same measure that it did, first in the States, then through the Supreme Court on the basis of Amendment XIV, in the half century between 1885 and 1935. But this fact does not signify that the clause is not, in both its procedural sense and its broader sense, especially when supplemented by the equal protection clause of Amendment XIV, a still valuable and viable source of judicial protection against parochial despotisms and petty tyrannies. Yet even in this respect, as certain recent decisions have shown, the Court can often act more effectively on the basis of congressional legislation implementing the Amendment than when operating directly on the basis of the Amendment itself.[76] Resume Considered for the two fundamental subjects of the powers of government and the liberties of individuals, interpretation of the Constitution by the Supreme Court falls into four tolerably distinguishable periods. The first, which reaches to the death of Marshall, is the period of the dominance of the Constitutional Document. The tradition concerning the original establishment of the Constitution was still fresh, and in the person and office of the great Chief Justice the intentions of the framers enjoyed a renewed vitality. This is not to say that Marshall did not have views of his own to advance; nor is it to say that the historicity of a particular theory concerning the Constitution is necessarily a matter of critical concern save to students of history. It is only to say that the theories which Marshall urged in support of his preferences were, in fact, frequently verifiable as theories of the framers of the Constitution. The second period is a lengthy one, stretching from the accession of Chief Justice Taney in 1835 to, say, 1895. It is the period _par excellence_ of Constitutional Theory. More and more the constitutional text fades into the background, and the testimony of the _Federalist_, Marshall's sole book of precedents, ceases to be cited. Among the theories which in one way or other received the Court's approval during this period were the notion of Dual Federalism, the doctrine of the Police Power, the taboo on delegation of legislative power, the derived doctrine of Due Process of Law, the conception of liberty as Freedom of Contract, and still others. The sources of some of these doctrines and the nature of the interests benefited by them have been indicated earlier in these pages. Their net result was to put the national law-making power into a strait-jacket so far as the regulation of business was concerned.