THE present volume carries on the fortunes of a portion of Europe to the end of the Middle Ages. This exception to the general chronological plan of the work seemed both convenient and desirable. The orbit of Byzantium, the history of the peoples and states which moved within that orbit and always looked to it as the central body, giver of light and heat, did indeed at some points touch or traverse the orbits of western European states, but the development of these on the whole was not deeply affected or sensibly perturbed by what happened east of Italy or south of the Danube, and it was only in the time of the Crusades that some of their rulers came into close contact with the Eastern Empire or that it counted to any considerable extent in their policies. England, the remotest state of the West, was a legendary country to the people of Constantinople, and that imperial capital was no more than a dream-name of wealth and splendor to Englishmen, except to the few adventurers who travelled thither to make their fortunes in the Varangian guards. It is thus possible to follow the history of the Eastern Roman Empire from the eighth century to its fall, along with those of its neighbors and clients, independently of the rest of Europe, and this is obviously more satisfactory than to interpolate in the main history of Western Europe chapters having no connection with those which precede and follow.

Besides being convenient, this plan is desirable. For it enables us to emphasize the capital fact that throughout the Middle Ages the same Empire which was founded by Augustus continued to exist and function and occupy even in its final weakness a unique position in Europe—a fact which would otherwise be dissipated, as it were, and obscured amid the records of another system of states with which it was not in close or constant contact. It was one of Gibbon's services to history that the title of his book asserted clearly and unambiguously this continuity.

We have, however, tampered with the correct name, which is simply Roman Empire, by adding Eastern, a qualification which although it has no official basis is justifiable as a convenient mark of distinction from the Empire which Charlemagne founded and which lasted till the beginning of the nineteenth century. This Western Empire had no good claim to the name of Roman. Charlemagne and those who followed him were not legitimate successors of Augustus, Constantine, Justinian, and the Isaurians, and this was tacitly acknowledged in their endeavors to obtain recognition of the imperial title they assumed from the sovereigns of Constantinople whose legitimacy was unquestionable.

Much as the Empire changed after the age of Justinian, as its population became more and more predominantly Greek in speech, its descent from Rome was always unmistakably preserved in the designation of its subjects as Romans. Its eastern neighbors knew it as Rum. Till the very end the names of most of the titles of its ministers, officials, and institutions were either Latin or the Greek translations of Latin terms that had become current in the earliest days of the Empire. Words of Latin derivation form a large class in medieval Greek. The modern Greek language was commonly called Romaic till the middle of the nineteenth century. It is only quite recently that Roumelia has been falling out of use to designate territories in the Balkan peninsula. Contrast with the persistence of the Roman name in the East the fact that the subjects of the Western Empire were never called Romans and indeed had no common name as a whole; the only "Romans" among them were the inhabitants of the city of Rome. There is indeed one district in Italy whose name still commemorates the Roman Empire—Romagna; but this exception only reinforces the contrast. For the district corresponds to the Exarchate of Ravenna, and was called Romania by its Lombard neighbors because it belonged to the Roman Emperor of Constantinople. It was at the New Rome, not at the Old, that the political tradition of the Empire was preserved. It is worth remembering too that the greatest public buildings of Constantinople were originally built, however they may have been afterwards changed or extended—the Hippodrome, the Great Palace, the Senate houses, the churches of St Sophia and the Holy Apostles—by Emperors of Latin speech, Severus, Constantine, Justinian.

On the other hand, the civilization of the later Roman Empire was the continuation of that of ancient Greece. Hellenism entered upon its second phase when Alexander of Macedon expanded the Greek world into the east, and on its third with the foundation of Constantine by the waters where Asia and Europe meet. Christianity, with its dogmatic theology and its monasticism, gave to this third phase its distinctive character and flavor, and Byzantine civilization, as we have learned to call it, is an appropriate and happy name. Its features are very fully delineated in this volume by Professor Diehl (chapter XXIV). The continuity which links the fifteenth century AD with the fifth BC is notably expressed in the long series of Greek historians, who maintained, it may be said, a continuous tradition of historiography. From Critobulus, the imitator of Thucydides, and Chalcocondyles, who told the story of the last days of the Empire, we can go back, in a line broken only by a dark interval in the seventh and eighth centuries, to the first great masters, Thucydides and Herodotus.

The development of “Byzantinism” really began in the fourth century. The historian Finlay put the question in a rather awkward way by asking, When did the Roman Empire change into the Byzantine? The answer is that it did not change into any other Empire than itself, but that some of the characteristic features of Byzantinism began to appear immediately after Constantinople was founded. There is, however, a real truth in Finlay's own answer to his question. He drew the dividing line at the accession of Leo the Isaurian, at the beginning of the eighth century. And, in fact, Leo's reign marked the consummation of a rapid change which had been going on during the past hundred years. Rapid: for I believe anyone who has studied the history of those centuries will agree that in the age of the Isaurians we feel much further away from the age of Justinian than we feel in the age of Justinian from the age of Theodosius the Great. Finlay's date has been taken as the starting point of this volume; it marks, so far as a date can, the transition to a new era.

The chief function which as a political power the Eastern Empire performed throughout the Middle Ages was to act as a bulwark for Europe, and for that civilization which Greece had created and Rome had inherited and diffused, against Asiatic aggression. Since the rise of the Sassanid power in the third century, Asia had been attempting, with varying success, to resume the role which it had played under the Achaemenids. The arms of Alexander had delivered for hundreds of years the Eastern coasts and waters of the Mediterranean from all danger from an Asiatic power. The Sassanids finally succeeded in reaching the Mediterranean shores and the Bosphorus. The roles of Europe and Asia were again reversed, and it was now for Byzantium to play on a larger stage the part formerly played by Athens and Sparta in a struggle for life and death. Heraclius proved himself not only a Themistocles but in some measure an Alexander. He not only checked the victorious advance of the enemy; he completely destroyed the power of the Great King and made him his vassal. But within ten years the roles were reversed once more in that amazing transformation scene in which an obscure Asiatic people which had always seemed destined to play a minor part became suddenly one of the strongest powers in the world. Constantinople had again to fight for her life, and the danger was imminent and the strain unrelaxed for eighty years. Though the Empire did not succeed in barring the road to Spain and Sicily, its rulers held the gates of Europe at the Propontis and made it impossible for them to sweep over Europe as they had swept over Syria and Egypt. Centuries passed, and the Comnenians guarded Europe from the Seljuks. The Ottomans were the latest bearers of the Asiatic menace. If the Eastern Empire had not been mortally wounded and reduced to the dimensions of a petty state by the greed and brutality of the Western brigands who called themselves Crusaders, it is possible that the Turks might never have gained a footing in Europe. Even as it was, the impetus of their first victorious advance was broken by the tenacity of the Palaeologi; assisted it is true by the arms of Timur. They had reached the Danube sixty years before Constantinople fell. When this at length happened, the first force and fury of their attack had been spent, and it is perhaps due to this delay that the Danube and the Carpathians were to mark the limit of Asiatic rule in Europe and that St Peter's was not to suffer the fate of St Sophia. Even in the last hours of its life, the Empire was still true to its traditional role of bulwark of Europe.

As a civilized state, we may say that the Eastern Empire performed three principal functions. As in its early years the Roman Empire laid the foundations of civilization in the West and educated Celtic and German peoples, so in its later period it educated the Slavs of eastern Europe. Russia, Bulgaria, and Serbia owed it everything and bore its stamp. Secondly, it exercised a silent but constant and considerable influence on western Europe by sending its own manufactures and the products of the East to Italy, France, and Germany. Many examples of its embroidered textile fabrics and its jewellery have been preserved in the West. In the third place, it guarded safely the heritage of classical Greek literature which has had on the modern world a penetrating influence difficult to estimate. That we owe our possession of the masterpieces of Hellenic thought and imagination to the Byzantines everyone knows, but everyone does not remember that those books would not have travelled to Italy in the fourteenth and fifteenth centuries, because they would not have existed, if the Greek classics had not been read habitually by the educated subjects of the Eastern Empire and therefore continued to be copied.

Here we touch on a most fundamental contrast between the Eastern Empire and the western European states of the Middle Ages. The well-to-do classes in the West were as a rule illiterate, with the exception of ecclesiastics; among the well-to-do classes in the Byzantine world education was the rule, and education meant not merely reading, writing, and arithmetic, but the study of ancient Greek grammar and the reading of classical authors. The old traditions of Greek education had never died out. In court circles at Constantinople everyone who was not an utter parvenu would recognize and understand a quotation from Homer. In consequence of this difference, the intellectual standards in the West where book-learning was reserved for a particular class, and in the East where every boy and girl whose parents could afford to pay was educated, were entirely different. The advantages of science and training and system were understood in Byzantine society.

The appreciation of method and system which the Byzantines inherited both from the Greeks and from the Romans is conspicuously shown in their military establishment and their conduct of war. Here their intellectuality stands out in vivid contrast with the rude dullness displayed in the modes of warfare practised in the West. Tactics were carefully studied, and the treatises on war which the officers used were kept up to date. The tacticians apprehended that it was stupid to employ uniform methods in campaigns against different foes. They observed carefully the military habits of the various peoples with whom they had to fight—Saracens, Lombards, Franks, Slays, Hungarians—and thought out different rules for dealing with each. The soldiers were most carefully and efficiently drilled. They understood organization and the importance of not leaving details to chance, of not neglecting small points in equipment. Their armies were accompanied by ambulances and surgeons. Contrast the feudal armies of the West, ill-disciplined, with no organization, under leaders who had not the most rudimentary idea of tactics, who put their faith in sheer strength and courage, and attacked all antagonists in exactly the same way. More formidable the Western knights might be than Slays or Magyars, but in the eyes of a Byzantine officer they were equally rude barbarians who had not yet learned that war is an art which requires intelligence as well as valor. In the period in which the Empire was strong, before it lost the provinces which provided its best recruits, its army was beyond comparison the best fighting machine in Europe. When a Byzantine army was defeated, it was always the incompetence of the general or some indiscretion on his part, never inefficiency or cowardice of the troops, that was to blame. The great disaster of Manzikert (1071), from which perhaps the decline of the Eastern Empire may be dated, was caused by the imbecility of the brave Emperor who was in command. A distinguished student of the art of war has observed that Gibbon's dictum, “the vices of Byzantine armies were inherent, their victories accidental”, is precisely the reverse of the truth. He is perfectly right.

Military science enabled the Roman Empire to hold its own for many centuries against the foes around it, east and west and north. Internally, its permanence and stability depended above all on the rule of Roman law. Its subjects had always “the advantage of possessing a systematic administration of justice enforced by fixed legal procedure”; they were not at the mercy of caprice. They could contrast their courts in which justice was administered with a systematic observance of rules, with those in which Mohammedan lawyers dispensed justice. The feeling that they were much better off under the government of Constantinople than their Eastern neighbors engendered a loyal attachment to the Empire, notwithstanding what they might suffer under an oppressive fiscal system

The influence of lawyers on the administration was always great, and may have been one of the facts which account for the proverbial conservatism of Byzantine civilization. But that conservatism has generally been exaggerated, and even in the domain of law there was a development, though the foundations and principles remained those which were embodied in the legislation of Justinian.

The old Roman law, as expounded by the classical jurists, was in the East considerably modified in practice here and there by Greek and oriental custom, and there are traces of this influence in the laws of Justinian. But Justinianean law shows very few marks of ecclesiastical influence which in the seventh and following centuries led to various changes, particularly in laws relating to marriage.

The law-book of the Isaurian Emperor, Leo III, was in some respects revolutionary, and although at the end of the ninth century the Macedonian Emperors, eager to renounce all the works of the heretical Isaurians, professed to return to the pure principles of Justinian, they retained many of the innovations and compromised with others. The principal reforms of Leo were too much in accordance with public opinion to be undone. The legal status of concubinage for instance was definitely abolished. Only marriages between Christians were recognized as valid. Marriages between first and second cousins were forbidden. Fourth marriages were declared illegal and even third were discountenanced. It is remarkable however that in the matter of divorce, where the differences between the views of State and Church had been sharpest and where the Isaurians had given effect to the un-Roman ecclesiastical doctrine that marriage is indissoluble, the Macedonians returned to the common-sense view of Justinian and Roman lawyers that marriage like other contracts between human beings may be dissolved. We can see new tendencies too in the history of the patria potestas. The Iconoclasts substituted for it a parental potestas, assigning to the mother rights similar to those of the father.

In criminal law there was a marked change in tendency. From Augustus to Justinian penalties were ever becoming severer and new crimes being invented. After Justinian the movement was in the direction of mildness. In the eighth century only two or three crimes were punishable by death. One of these was murder and in this case the extreme penalty might be avoided if the murderer sought refuge in a church. On the other hand penalties of mutilation were extended and systematized. This kind of punishment had been inflicted in much earlier times and authorized in one or two cases by Justinian. In the eighth century we find amputations of the tongue, hand, and nose part of the criminal system, and particularly applied in dealing with sexual offences. If such punishments strike us today as barbaric (though in England, for instance, mutilation was inflicted little more than two centuries ago), they were then considered as a humane substitute for death, and the Church approved them because a tongueless or noseless sinner had time to repent. In the same way, it was a common practice to blind, instead of killing, rebels or unsuccessful candidates for the throne. The tendency to avoid capital punishment is illustrated by the credible record that during the reign of John Comnenus there were no executions.

The fact that in domestic policy the Eastern Empire was far from being obstinately conservative is also illustrated by the reform of legal education in the eleventh century, when it was realized that a system which had been in practice for a long time did not work well and another was substituted. That conception of the later Empire which has made the word Byzantine almost equivalent to Chinese was based on ignorance, and is now discredited. It is obvious that no State could have lasted so long in a changing world, if it had not had the capacity of adapting itself to new conditions. Its administrative machinery was being constantly modified by capable and hardworking rulers of whom there were many; the details of the system at the end of the tenth century differed at ever so many points from those of the eighth. As for art and literature, there were ups and downs, declines and renascences, throughout the whole duration of the Empire. It is only in quite recent years that Byzantine literature and Byzantine art have been methodically studied; in these wide fields of research Krumbacher’s Byzantine Literature and Strzygowski’s Orient were pioneer works marking a new age. Now that we are getting to know the facts better and the darkness is gradually lifting, we have come to see that the history of the Empire is far from being a monotonous chronicle of palace revolutions, circus riots, theological disputes, tedious ceremonies in a servile court, and to realize that, as in any other political society, conditions were continually changing and in each succeeding age new political and social problems presented themselves for which some solution had to be found. If the chief interest in history lies in observing such changes, watching new problems shape themselves and the attempts of rulers or peoples to solve them, and seeing how the characters of individuals and the accidents which befall them determine the course of events, the story of the Eastern Empire is at least as interesting as that of any medieval State, or perhaps more interesting because its people were more civilized and intellectual than other Europeans and had a longer political experience behind them. On the ecclesiastical side it offers the longest and most considerable experiment of a State-Church that Christendom has ever seen.

The Crusades were, for the Eastern Empire, simply a series of barbarian invasions of a particularly embarrassing kind, and in the present volume they are treated merely from this point of view and their general significance in universal history is not considered. The full treatment of their causes and psychology and the consecutive story of the movement are reserved for Vol. V.

But the earlier history of Venice has been included in this volume. The character of Venice and her career were decided by the circumstance that she was subject to the Eastern Emperors before she became independent. She was extra-Italian throughout the Middle Ages; she never belonged to the Carolingian Kingdom of Italy. And after she had slipped into independence almost without knowing it—there was never a violent breaking away from her allegiance to the sovereigns of Constantinople—she moved still in the orbit of the Empire; and it was on the ruins of the Empire, dismembered by the criminal enterprise of her Duke Dandolo, that she reached the summit of her power as mistress in the Aegean and in Greece. She was the meeting-place of two civilizations, but it was eastern not western Europe that controlled her history and lured her ambitions. Her citizens spoke a Latin tongue and in spiritual matters acknowledged the supremacy of the elder Rome, but the influence from new Rome had penetrated deep, and their great Byzantine basilica is a visible reminder of their long political connection with the Eastern Empire.