An Introduction to the Philosophy of Law

by Roscoe Pound

We may understand the materials upon which Greek philosophers were working if we look at an exhortation addressed by Demosthenes to an Athenian jury. Men ought to obey the law, he said, for four reasons: because laws were prescribed by God, because they were a tradition taught by wise men who knew the good old customs, because they were deductions from an eternal and immutable moral code and because they were agreements of men with each other binding them because of a moral duty to keep their promises. It was not long since that men had thought of legal precepts as divinely revealed, nor was it long since that law had been a tradition of old customs of decision. Philosophers were seeking a better basis for them in eternal principles of right. In the meantime in political theory, at least, many of them were the agreements of Athenian citizens as to how they should conduct themselves in the inevitable clashes of interests in everyday life. What was needed above all was some theory of the authority of law which should impose bonds of reason upon those who enacted, upon those who applied and upon those who were subject to law in such an amorphous legal order.

A sure basis of authority resting upon something more stable than human will and the power of those who govern to impose their will for the time being was required also for the problem of social control in the Greek city-state. In order to maintain the general security and the security of social institutions amid a strife of factions in a society organized on the basis of kinship and against the wilfulness of masterful individuals boasting descent from gods, in order to persuade or coerce both the aristocracy and the mass of the low born to maintain in orderly fashion the social status quo, it would not do to tell them that law was a gift of God, nor that what offended the aristocrat as a radical bit of popular legislation enacted at the instance of a demagogue was yet to be obeyed because it had been so taught by wise men who knew the good old customs, nor that Demos chafing under some item of a class-possessed tradition was bound by it as something to which all citizens had agreed. The exigencies of the social order called for a distinction between νόμος and τα νομιζόμενα—between law and rules of law. The Minos, which if not actually a dialogue of Plato's seems clearly Platonic and very close to Plato in time, is taken up with this distinction and gives us a clue to the juristic problems of the time.

Another example may be seen in Aristotle's well-known discussion in the Nicomachean Ethics. It is significant that Greek thinkers always couple custom and enactment; things which today we contrast. These were the formal bases of legal authority. So Aristotle considers, not natural law and positive law, but what is just in itself—just by nature or just in its idea—and what derives its sole title to be just from convention or enactment. The latter, he says, can be just only with respect to those things which by nature are indifferent. Thus when a newly reconstituted city took a living Spartan general for its eponymus, no one was bound by nature to sacrifice to Brasidas as to an ancestor, but he was bound by enactment and after all the matter was one of convention, which, in a society framed on the model of an organized kindred, required that the citizens have a common heroic ancestor, and was morally indifferent. The distinction was handed down to modern legal science by Thomas Aquinas, was embodied in Anglo-American legal thought by Blackstone, and has become staple. But it is quite out of its setting as a doctrine of mala prohibita and mala in se. An example of the distinction between law and rules of law has become the basis of an arbitrary line between the traditionally anti-social, penalized by the common law, and recently penalized infringements of newly or partially recognized social interests. Although the discrimination between what is just and right by nature and what is just because of custom or enactment has had a long and fruitful history in philosophical jurisprudence and is still a force in the administration of justice, I suspect that the permanent contribution of Greek philosophy of law is to be found rather in the distinction between law and rules of law, which lies behind it and has significance for all stages of legal development.

Roman lawyers came in contact with philosophy in the transition from the strict law to the stage of equity and natural law, and the contact had much to do with enabling them to make the transition. From a purely legal standpoint Greek law was in the stage of primitive law. Law and morals were still largely undifferentiated. Hence Greek philosophical thinking of a stage of undifferentiated law and morals lent itself to the identification of the legal and the moral in juristic thinking which was characteristic of the classical Roman law. But the strict law obviously was indifferent to morals and in many vital points was quite at variance with the moral ideas of the time. The Greek distinction of just by nature and just by convention or enactment was suggested at once by such a situation. Moreover the forms of law at the end of the Republic and at the beginning of the Empire invited a theory of law as something composite, made up of more than one type of precept and resting immediately on more than one basis of authority.

Cicero enumerates seven forms of law. Three of these are not heard of thereafter in Roman juristic writing. Evidently already in Cicero's time they belonged to the past and had ceased to be effective forms of the actual law. The four remaining, namely, statutes, resolutions of the senate, edicts of the magistrates, and the authority of those learned in the law, come to three—legislation, administrative edicts, and juristic reasoning on the basis of the legal tradition. And these correspond to the three elements which made up the law. First, there was the ius ciuile: the Twelve Tables, subsequent legislation, interpretation of both, and the traditional law of the city. Second, there was the mass of rules, in form largely procedural, which was contained in the edicts. The growing point of the law had been here and to some extent growth was still going on through this means. Indeed this part of the law reached its final form under Hadrian. Third, there were the writings of the jurisconsults. The growing point of the law had begun to be here and this was the most important form of law in the classical period from Augustus to the third century. This part of the law got its final form in the Digest of Justinian. Of the three elements, the first was thought of originally as declared and published custom. Later it was thought of as resting on the authority of the state. It was obviously local and peculiar to Rome. In form it rested on the legislative power of the Roman people, supplemented by a mere interpretation of the legislative command with only the authority of customary acceptance. In Greek phrase it rested on convention and enactment. The second purported to be the rules observed by civilized peoples, and on points of commercial law may well have been an approximation thereto. Apart from this, however, according to ancient ideas of personal law, the rules which obtained among civilized peoples were eminently a proper law to apply between citizen and non-citizen. In Greek phrase it was law by convention. The basis of the third was simply reason. The jurisconsult had no legislative power and no imperium. The authority of his responsum, as soon as law ceased to be a class tradition, was to be found in its intrinsic reasonableness; in the appeal which it made to the reason and sense of justice of the iudex. In Greek phrase, if it was law, it was law by nature.

As the rise of professional lawyers, the shifting of the growing point of law to juristic writing and the transition from the law of a city to a law of the world called for a legal science, there was need of a theory of what law was that could give a rational account of the threefold body of rules in point of origin and authority, which were actually in operation, and would at the same time enable the jurists to shape the existing body of legal precepts by reason so as to make it possible for them to serve as law for the whole world. The perennial problem of preserving stability and admitting of change was presented in an acute form. Above all the period from Augustus to the second quarter of the third century was one of growth. But it was revolutionary only if we compare the law at the end of the period with the law of the generation before Cicero. The jurisconsults were practical lawyers and the paramount interest in the general security was ever before their eyes. While as an ideal they identified law with morals, they did not cease to observe the strict law where it was applicable nor to develop its precepts by analogy according to the known traditional technique when new phases of old questions came before them. Hence what to the Greeks was a distinction between right by nature and right by convention or enactment became to them a distinction between law by nature and law by custom or legislation. The Latin equivalent of το δίκαιον (the right or the just) became their word for law. They said ius where Cicero said lex. And this convenient ambiguity, lending itself to identification of what ought to be and what is, gave a scientific foundation for the belief of the jurisconsults that when and where they were not bound by positive law they had but to expound the reason and justice of the thing in order to lay down the law.

It must be borne in mind that "nature" did not mean to antiquity what it means to us who are under the influence of the idea of evolution. To the Greek, it has been said, the natural apple was not the wild one from which our cultivated apple has been grown, but rather the golden apple of the Hesperides. The "natural" object was that which expressed most completely the idea of the thing. It was the perfect object. Hence the natural law was that which expressed perfectly the idea of law and a rule of natural law was one which expressed perfectly the idea of law applied to the subject in question; the one which gave to that subject its perfect development. For legal purposes reality was to be found in this ideal, perfect, natural law, and its organ was juristic reason. Legislation and the edict, so far as they had any more than a positive foundation of political authority, were but imperfect and ephemeral copies of this jural reality. Thus the jurists came to the doctrine of the ratio legis, the principle of natural law behind the legal rule, which has been so fruitful both of practical good and of theoretical confusion in interpretation. Thus also they came to the doctrine of reasoning from the analogy of all legal rules, whether traditional or legislative, since all, so far as they had jural reality, had it because and to the extent that they embodied or realized a principle of natural law.

Natural law was a philosophical theory for a period of growth. It arose to meet the exigencies of the stage of equity and natural law, one of the great creative periods of legal history. Yet, as we have seen, even the most rapid growth does not permit the lawyer to ignore the demand for stability. The theory of natural law was worked out as a means of growth, as a means of making a law of the world on the basis of the old strict law of the Roman city. But it was worked out also as a means of directing and organizing the growth of law so as to maintain the general security. It was the task of the jurists to build and shape the law on the basis of the old local materials so as to make it an instrument for satisfying the wants of a whole world while at the same time insuring uniformity and predictability. They did this by applying a new but known technique to the old materials. The technique was one of legal reason; but it was a legal reason identified with natural reason and worked out and applied under the influence of a philosophical ideal. The conception of natural law as something of which all positive law was but declaratory, as something by which actual rules were to be measured, to which so far as possible they were to be made to conform, by which new rules were to be framed and by which old rules were to be extended or restricted in their application, was a powerful instrument in the hands of the jurists and enabled them to proceed in their task of legal construction with assured confidence.

But the juristic empiricism by which the ius ciuile was made into a law of the world needed something more than a theoretical incentive. It was a process of analogical development by extension here and restriction there, of generalization, first in the form of maxims and later by laying down broad principles, and of cautious striking out of new paths, giving them course and direction by trial and error. It was a process very like that by which Anglo-American judicial empiricism has been able to make a law of the world on the basis of the legal precepts of seventeenth-century England. Such a process required something to give direction to juristic reasoning, to give definite content to the ideal, to provide a reasonably defined channel for juristic thought. This need was met by the philosophical theory of the nature of things and of the law of nature as conformity thereto. In practice jurist-made and judge-made law have been molded consciously, or unconsciously, by ideas as to what law is for; by theories as to the end of law. In the beginnings of law men had no more ambitious conception than a peaceable ordering of society at any cost. But the Greeks soon got a better conception of an orderly and peaceable maintaining of the social status quo. When the theory of natural law is applied to that conception, we get the notion of an ideal form of the social status quo—a form which expresses its nature, a perfect form of the social organization of a given civilization—as that which the legal order is to further and maintain. Thus judge and jurist obtain a guide which has served them well ever since. They are to measure all situations by an idealized form of the social order of the time and place and are so to shape the law as to make it maintain and further this ideal of the social status quo. We shall meet this idea in various forms throughout the subsequent history of the philosophy of law. It constitutes the permanent contribution of Rome to legal philosophy.

As soon as scientific legal development begins in the Middle Ages the law once more comes in contact with philosophy through the study of both in the universities. What was the need of the time which philosophy was called upon to satisfy? Following an era of anarchy and disunion and violence men desired order and organization and peace. They called for a philosophy that would bolster up authority and rationalize their desire to impose a legal yoke upon society. The period was one of transition from the primitive law of the Germanic peoples to a strict law, through reception of Roman law as authoritative legislation or through compilation of the Germanic customary law more or less after the Roman model, as in the north of France, or through declaration of the customary law in reported decisions of strong central courts, as in England. Thus it soon became a period of strict law. Scholastic philosophy, with its reliance upon dialectic development of authoritatively given premises, its faith in formal logic and its central problem of putting reason as a foundation under authority, responded exactly to these demands. It is no misnomer to style the commentators or post-glossators of the fourteenth and fifteenth centuries the "scholastic jurists." For it was in large part the philosophy that met the needs of the time so completely which enabled them to put the Roman law of Justinian in a form to be received and administered in the Europe of nine centuries later. While they made the gloss into law in place of the text and made many things over, as they had to be made over if they were to fit a wholly different social order, the method of dialectical development of absolute and unquestioned premises made it appear that nothing had been done but to develop the logical implications of an authoritative text. Men could receive the law of Bartolus so long as they believed it but the logical unfolding of the pre-existing content of the binding legislation of Justinian. It is interesting to note in Fortescue an application of this to the rules of the common law in its stage of strict law. He assumes that these rules are the principles of which he reads in the commentators on Aristotle and that they may be compared to the axioms of the geometrician. The time had not yet come to call rules or principles or axioms in question. The need was to rationalize men's desire to be governed by fixed rules and to reconcile, in appearance at least, the change and growth which are inevitable in all law with the need men felt of having a fixed, unchangeable, authoritative rule. The scholastic philosophy did notable service in these respects and, I venture to think, left as a permanent contribution to legal science the method of insuring certainty by logical development of the content of authoritatively defined conceptions.