If we turn to the ideas which have obtained in conscious thinking about the end of law, we may recognize three which have held the ground successively in legal history and a fourth which is beginning to assert itself. The first and simplest idea is that law exists in order to keep the peace in a given society; to keep the peace at all events and at any price. This is the conception of what may be called the stage of primitive law. It puts satisfaction of the social want of general security, stated in its lowest terms, as the purpose of the legal order. So far as the law goes, other individual or social wants are ignored or are sacrificed to this one. Accordingly the law is made up of tariffs of exact compositions for every detailed injury instead of principles of exact reparation, of devices to induce or coerce submission of controversies to adjudication instead of sanctions, of regulation of self-help and self-redress instead of a general prohibition thereof, and of mechanical modes of trial which at any rate do not admit of argument instead of rational modes of trial involving debate and hence dispute and so tending to defeat the purpose of the legal order. In a society organized on the basis of kinship, in which the greater number of social wants were taken care of by the kin-organizations, there are two sources of friction: the clash of kin-interests, leading to controversies of one kindred with another, and the kinless man, for whom no kin-organization is responsible, who also has no kin-organization to stand behind him in asserting his claims. Peace between kindreds and peace between clansmen and the growing mass of non-gentile population is the unsatisfied social want to which politically organized society must address itself. The system of organized kindreds gradually breaks down. Groups of kinsmen cease to be the fundamental social units. Kin-organization is replaced by political organization as the primary agency of social control. The legal unit comes to be the free citizen or the free man. In this transition regulation of self-redress and prevention of private war among those who have no strong clan-organizations to control them or respond for them are demanded by the general security. The means of satisfying these social wants are found in a legal order conceived solely in terms of keeping the peace.

Greek philosophers came to conceive of the general security in broader terms and to think of the end of the legal order as preservation of the social status quo. They came to think of maintaining the general security mediately through the security of social institutions. They thought of law as a device to keep each man in his appointed groove in society and thus prevent friction with his fellows. The virtue on which they insisted was sophrosyne, knowing the limits which nature fixes for human conduct and keeping within them. The vice which they denounced was hybris, wilful bondbreaking—wilful transgression of the socially appointed bounds. This mode of thinking follows the substitution of the city-state political organization of society for the kin-organization. The organized kindreds were still powerful. An aristocracy of the kin-organized and kin-conscious, on the one hand, and a mass of those who had lost or severed their ties of kinship, or had come from without, on the other hand, were in continual struggle for social and political mastery. Also the politically ambitious individual and the masterful aristocrat were continually threatening the none too stable political organization through which the general security got a precarious protection. The chief social want, which no other social institution could satisfy, was the security of social institutions generally. In the form of maintenance of the social status quo this became the Greek and thence the Roman and medieval conception of the end of law.

Transition from the idea of law as a device to keep the peace to the idea of law as a device to maintain the social status quo may be seen in the proposition of Heraclitus, that men should fight for their laws as for the walls of their city. In Plato the idea of maintaining the social order through the law is fully developed. The actual social order was by no means what it should be. Men were to be reclassified and everyone assigned to the class for which he was best fitted. But when the classification and the assignment had been made the law was to keep him there. It was not a device to set him free that he might find his own level by free competition with his fellows and free experiment with his natural powers. It was a device to prevent such disturbances of the social order by holding each individual to his appointed place. As Plato puts it, the shoemaker is to be only a shoemaker and not a pilot also; the farmer is to be only a farmer and not a judge as well; the soldier is to be only a soldier and not a man of business besides; and if a universal genius who through wisdom can be everything and do everything comes to the ideal city-state, he is to be required to move on. Aristotle puts the same idea in another way, asserting that justice is a condition in which each keeps within his appointed sphere; that we first take account of relations of inequality, treating individuals according to their worth, and then secondarily of relations of equality in the classes into which their worth requires them to be assigned. When St. Paul exhorted wives to obey their husbands, and servants to obey their masters, and thus everyone to exert himself to do his duty in the class where the social order had put him, he expressed this Greek conception of the end of law.

Roman lawyers made the Greek philosophical conception into a juristic theory. For the famous three precepts to which the law is reduced in Justinian's Institutes come to this: Everyone is to live honorably; he is to "preserve moral worth in his own person" by conforming to the conventions of the social order. Everyone is to respect the personality of others; he is not to interfere with those interests and powers of action, conceded to others by the social order, which make up their legal personality. Everyone is to render to everyone else his own; he is to respect the acquired rights of others. The social system has defined certain things as belonging to each individual. Justice is defined in the Institutes as the set and constant purpose of giving him these things. It consists in rendering them to him and in not interfering with his having and using them within the defined limits. This is a legal development of the Greek idea of harmoniously maintaining the social status quo. The later eastern empire carried it to the extreme. Stability was to be secured by rigidly keeping everyone to his trade or calling and his descendants were to follow him therein. Thus the harmony of society and the social order would not be disturbed by individual ambition.

In the Middle Ages the primitive idea of law as designed only to keep the peace came back with Germanic law. But the study of Roman law presently taught the Roman version of the Greek conception and the legal order was thought of once more as an orderly maintenance of the social status quo. This conception answered to the needs of medieval society, in which men had found relief from anarchy and violence in relations of service and protection and a social organization which classified men in terms of such relations and required them to be held to their functions as so determined. Where the Greeks thought of a stationary society corrected from time to time with reference to its nature or ideal, the Middle Ages thought of a stationary society resting upon authority and determined by custom or tradition. To each, law was a system of precepts existing to maintain this stationary society as it was.

In the feudal social order reciprocal duties involved in relations established by tradition and taken to rest on authority were the significant legal institutions. With the gradual disintegration of this order and the growing importance of the individual in a society engaged in discovery, colonization and trade, to secure the claims of individuals to assert themselves freely in the new fields of human activity which were opening on every side became a more pressing social want than to maintain the social institutions by which the system of reciprocal duties was enforced and the relations involving those duties were preserved. Men did not so much desire that others perform for them the duties owing in some relation, as that others keep hands off while they achieved what they might for themselves in a world that continually afforded new opportunities to the active and the daring. The demand was no longer that men be kept in their appointed grooves. Friction and waste were apprehended, not from men getting out of these grooves, but from attempts to hold them there by means devised to meet the needs of a different social order whereby they were made to chafe under arbitrary restraint and their powers were not utilized in the discovery and exploitation of the resources of nature, to which human powers were to be devoted in the succeeding centuries. Accordingly the end of law comes to be conceived as a making possible of the maximum of individual free self-assertion.

Transition to the newer way of thinking may be seen in the Spanish jurist-theologians of the sixteenth century. Their juristic theory was one of natural limits of activity in the relations of individuals with each other, that is, of limits to human action which expressed the rational ideal of man as a moral creature and were imposed upon men by reason. This theory differs significantly from the idea of antiquity, although it goes by the old name. The Greeks thought of a system of limiting men's activities in order that each might be kept in the place for which he was best fitted by nature—the place in which he might realize an ideal form of his capacities—and thus to preserve the social order as it stands or as it shall stand after a rearrangement. The sixteenth-century jurists of the Counter-Reformation held that men's activities were naturally limited, and hence that positive law might and should limit them in the interest of other men's activities, because all men have freedom of will and ability to direct themselves to conscious ends. Where Aristotle thought of inequalities arising from the different worth of individual men and their different capacities for the things which the social order called for, these jurists thought of a natural (i.e., ideal) equality, involved in the like freedom of will and the like power of conscious employment of one's faculties inherent in all men. Hence law did not exist to maintain the social status quo with all its arbitrary restraints on the will and on employment of individual powers; it existed rather to maintain the natural equality which often was threatened or impaired by the traditional restrictions on individual activity. Since this natural equality was conceived positively as an ideal equality in opportunity to do things, it could easily pass into a conception of free individual self-assertion as the thing sought, and of the legal order as existing to make possible the maximum thereof in a world abounding in undiscovered resources, undeveloped lands and unharnessed natural forces. The latter idea took form in the seventeenth century and prevailed for two centuries thereafter, culminating in the juristic thought of the last generation.

Law as a securing of natural equality became law as a securing of natural rights. The nature of man was expressed by certain qualities possessed by him as a moral, rational creature. The limitations on human activity, of which the Spanish jurist-theologians had written, got their warrant from the inherent moral qualities of men which made it right for them to have certain things and do certain things. These were their natural rights and the law existed simply to protect and give effect to these rights. There was to be no restraint for any other purpose. Except as they were to be compelled to respect the rights of others, which the natural man or ideal man would do without compulsion as a matter of reason, men were to be left free. In the nineteenth century this mode of thought takes a metaphysical turn. The ultimate thing for juristic purposes is the individual consciousness. The social problem is to reconcile conflicting free wills of conscious individuals independently asserting their wills in the varying activities of life. The natural equality becomes an equality in freedom of will. Kant rationalized the law in these terms as a system of principles or universal rules, to be applied to human action, whereby the free will of the actor may co-exist along with the free will of everyone else. Hegel rationalized the law in these terms as a system of principles wherein and whereby the idea of liberty was realizing in human experience. Bentham rationalized it as a body of rules, laid down and enforced by the state's authority, whereby the maximum of happiness, conceived in terms of free self-assertion, was secured to each individual. Its end was to make possible the maximum of free individual action consistent with general free individual action. Spencer rationalized it as a body of rules, formulating the "government of the living by the dead," whereby men sought to promote the liberty of each limited only by the like liberty of all. In any of these ways of putting it, the end of law is to secure the greatest possible general individual self-assertion; to let men do freely everything they may consistently with a like free doing of everything they may by their fellow men. This is indeed a philosophy of law for discoverers and colonizers and pioneers and traders and entrepreneurs and captains of industry. Until the world became crowded, it served well to eliminate friction and to promote the widest discovery and utilization of the natural resources of human existence.

Looking back at the history of this conception, which has governed theories of the end of law for more than two hundred years, we may note that it has been put to three uses. It has been used as a means of clearing away the restraints upon free economic activity which accumulated during the Middle Ages as incidents of the system of relational duties and as expressions of the idea of holding men to their place in a static social order. This negative side played an important part in the English legislative reform movement in the last century. The English utilitarians insisted upon removal of all restrictions upon individual free action beyond those necessary for securing like freedom on the part of others. This, they said, was the end of legislation. Again it has been used as a constructive idea, as in the seventeenth and eighteenth centuries, when a commercial law which gave effect to what men did as they willed it, which looked at intention and not at form, which interpreted the general security in terms of the security of transactions and sought to effectuate the will of individuals to bring about legal results, was developed out of Roman law and the custom of merchants through juristic theories of natural law. Finally it was used as a stabilizing idea, as in the latter part of the nineteenth century, when men proved that law was an evil, even if a necessary evil, that there should be as little law made as possible, since all law involved restraint upon free exertion of the will, and hence that jurist and legislator should be content to leave things legal as they are and allow the individual "to work out in freedom his own happiness or misery" on that basis.

When this last stage in the development of the idea of law as existing to promote or permit the maximum of free individual self-assertion had been reached, the juristic possibilities of the conception had been exhausted. There were no more continents to discover. Natural resources had been discovered and exploited and the need was for conservation of what remained available. The forces of nature had been harnessed to human use. Industrial development had reached large proportions, and organization and division of labor in our economic order had gone so far that anyone who would could no longer go forth freely and do anything which a restless imagination and daring ambition suggested to him as a means of gain. Although lawyers went on repeating the old formula, the law began to move in another direction. The freedom of the owner of property to do upon it whatever he liked, so he did not overstep his limits or endanger the public health or safety, began to be restricted. Nay, the law began to make men act affirmatively upon their property in fashions which it dictated, where the general health was endangered by non-action. The power to make contracts began to be limited where industrial conditions made abstract freedom of contract defeat rather than advance full individual human life. The power of the owner to dispose freely of his property began to be limited in order to safeguard the security of the social institutions of marriage and the family. Freedom of appropriating res nullius and of using res communes came to be abridged in order to conserve the natural resources of society. Freedom of engaging in lawful callings came to be restricted, and an elaborate process of education and examination to be imposed upon those who would engage in them, lest there be injury to the public health, safety or morals. A regime in which anyone might freely set up a corporation to engage in a public service, or freely compete in such service, was superseded by one of legal exemption of existing public utilities from destructive competition. In a crowded world, whose resources had been exploited, a system of promoting the maximum of individual self-assertion had come to produce more friction than it relieved and to further rather than to eliminate waste.