best seen at certain definite epochs. It is indeed true that in nations which have reached a certain stage of civilization the conditions of life, and the relations of men and classes to one another, never remain quite the same from generation to generation. Every mechanical discovery, every foreign war or domestic insurrection, every accession or loss of territory, every religious or intellectual movement leaves things somewhat different from what it found them. Nevertheless, though the process of change is, except in savage or barbarous peoples, practically constant and uninterrupted, it becomes at certain particular moments much more swift and palpable, rushing, so to speak, through rapids and over cataracts instead of gliding on in a smooth and equable flow. These are the moments when a nation, or its ruler, perceives that the economic or social transformations which have been taking place require to be recognized and dealt with by corresponding changes in law and institutions, or when some political disturbance, or shifting of power from one class or group to another, supplies the occasion for giving effect to views or sentiments hitherto repressed. Accordingly it is profitable to give special attention to these transitional epochs, because it is in them that the relation between causes and consequences can be studied most easily and on the largest scale. Let us see what are the epochs in Roman and in English history which may be selected as those marked by conspicuous legal or institutional changes before we examine the relations of these changes to the forces which brought them about.

I. FIVE CHIEF EPOCHS OF LEGAL CHANGE AT ROME.

In the thousand years of Roman history that lie between the first authentic records of the constitution and laws of the city, say 451 B.C., when the Decemviral Commission, which produced the laws of the Twelve Tables, was appointed, and 565 A.D., when Justinian died, hav

ing completed his work of codification and new legislation 1, we may single out five such epochs.

1. The epoch of the Decemviral Legislation, when many of the old customs of the nation, which had been for the most part preserved by oral tradition, were written down, being no doubt modified in the process.

2. The days of the First and Second Punic Wars, when the growth of population and trade, the increase of the number of foreigners resident in Rome, and the conquest by Rome of territories outside Italy, began to induce the development of the Praetorship as an office for expanding and slowly remodelling the law.

3. The end of the Republic and early days of the Empire, when there was a brilliant development of juridical literature, when the opinions of selected jurists received legal authority from the Emperor's commission, when the Senate was substituted for the popular assemblies as the organ of legislation, and when the administration of the provinces was resettled on a better basis-all these changes inducing a more rapid progress of legal reform.

4. The reigns of Diocletian and Constantine, when imperial legislation took a fresh and vigorous start, and when the triumph of Christianity brought a new, a powerful, and a widely pervasive force into the field of politics and legislation.

5. The reign of Justinian, when the plan of codification whose outlines Julius Caesar had conceived, and which Theodosius II had done something to carry out, was at last completed by the inclusion of the whole law of Rome in two books containing the pith of the then existing law, and when many sweeping reforms were effected by new legislation.

It is less easy to fix upon epochs of conspicuous

1 It is convenient to stop with Justinian, because he gave the law the shape in which it has influenced modern Europe, and because our historical data became much more scanty after his time. But of course the history of the law goes on to A.D. 1204, and in a sense even to A.D. 1453, in an unbroken stream, the codes issued by the later Emperors, and especially the Basilica of Leo the Philosopher, being based upon Justinian's redaction.

change in English legal institutions and law, because English development has been on the whole more gradual, and because the territorial limits of the area affected by change have not expanded to anything like the same extent as did the territories that obeyed Rome. Rome was a City which grew to be the civilized world: the Urbs became Orbis Terrarum. The English were, and remain, a people inhabiting the southern part of an island, and beyond its limits they have expanded (except as respects Ireland), not by taking in new territories as parts of their State, but by planting semidependent self-governing States which reproduce England. However, one may, for the sake of a comparison with Rome, take the five following epochs as those at which the process of change became the most swift and the most effective for destruction and creation.

II. FIVE EPOCHS OF LEGAL CHANGE IN ENGLAND.

1. The time of Henry II, when the King's Courts became organized, and began to evolve a Common Law for the whole realm out of the mass of local customs.

2. The times of Edward I and Edward III, when the solidification of the kingdom saw the creation of a partly representative legislature, the enactment of important statutes, and the establishment of a vigorous organ for the development and amendment of the law in the Chancellorship.

3. The time of Henry VIII and Edward VI, when the progress of society and an ecclesiastical revolution caused the passing of several sweeping legal reforms, separated the courts and the law of England from a system of jurisprudence which had influenced it in common with the rest of Western Christendom, and permanently reduced the power of the clergy and of clerical ideas.

1 I do not include India or the Crown Colonies, because the population of these is not English.

4. The epoch of the Great Civil War and Revolution, when legislative authority, hitherto shared or disputed by the Crown and the Houses of Parliament, passed definitely to the latter, and particularly to the popular branch of Parliament, and when (as a consequence) the relation of the Monarch to the landholding aristocracy, and that of the State to its subjects in religious matters, underwent profound alterations.

5. The reigns of William IV and Victoria, when the rapid growth of manufacturing industry, of trade, and of population, coupled with the influence as well of new ideas in the sphere of government as of advances made in economic and social science, has shaken men loose from many old traditions or prejudices, and has, while rendering much of the old law inapplicable, made a great deal of new legislation indispensable.

Now let us consider what are the forces, influences, or conditions which at all times and everywhere become the sources and determining causes of changes in laws and institutions, these latter being that framework which society constructs to meet its needs, whether administrative or economic or social.

Five such determining causes may be singled out as of special importance. They are these.

1. Political changes, whether they consist in a shifting of power as between the classes controlling the government of a country, or affect the structure of the governmental machinery itself, as for instance by the substitution of a monarch for an assembly or of an asembly for a monarch.

2. The increase of territory, whether as added to and incorporated in the pre-existing home of a nation or as constituting a subject dominion.

3. Changes in religion, whether they modify the working of the constitution of the country or involve the abolition of old laws and the enactment of new

ones.

4. Economic changes, such as the increase of indus

trial production or the creation of better modes of communication, with the result of facilitating the exchange of commodities.

5. The progress of philosophic or scientific thought, whether as enouncing new principles which ultimately take shape in law, or as prompting efforts to make the law more logical, harmonious and compendious.

The influence of other nations might be added, as a sixth force, but as this usually acts through speculative thought, less frequently by directly creating institutions and laws, it may be deemed a form of No. 5.

The two last of these five sources of change, viz. commerce and speculative or scientific thought, are constantly, and therefore gradually at work, while the other three usually, though not invariably, operate suddenly and at definite moments. All have told powerfully both on Rome and on England. But as the relative importance of each varies from one country to another, so we shall discover that some have counted for more in the case of Rome, some in that of England. The differences throw an instructive light on the annals of the two nations.

III. OUTLINE OF LEGAL CHANGES AT ROME.

The legal history of Rome begins with the law of the Twelve Tables. This remarkable code, which, it need hardly be said, was neither a code in the modern sense, nor in the main new law, but rather a concise and precise statement of the most important among the ancient customs of the people, dominated the whole of the republican period, and impressed a peculiar character upon the growth of Roman law from the beginning till the end of the thousand years we are regarding. It gave a sort of unity and centrality to that growth. which we miss in many other countries, England included, for all Roman statutes bearing on private law were passed with reference to the Twelve Tables,