For more than five centuries after the overthrow of Darius by the armies of Macedon the remnants of the Persian race languished in the Province of Persis, a small state lying east of the Persian Gulf, to which was allowed a semi-independence by the supreme government. Here was the original home of Cyrus, and here he matured his plans for the conquest of Media. From thence was derived the name of Persia, which was applied by the western nations to the whole land of Iran, the native appellation of the extensive plateau ranging from the Hindu Kush to the river Tigris. In Persis was situated Persepolis, the traditional capital of the Persians, where the sacred fires of the Zoroastrians was kept perpetually alight in a temple by the Magi. In a drunken freak, or perhaps as a signal to all Asia that he had succeeded to the sovreignty of Iran, the ancient city had been committed to the flames by Alexander;[22] but eventually a capital was reinstated on the old site, and in later centuries became known as Istakhr.[23] About 200 A.D. a reawakening of Persian aspirations became apparent, and a new Cyrus arose at Istakhr to lead his nation to the reconquest of their former empire. Ardeshír was the grandson of Sásán, who by a fortunate marriage had united the pre-eminence of the priestly caste with that of the princely house of Persis. Having gained possession of the local throne by his superior energy, he began to exercise himself in active warfare by attacking the neighbouring states, whose princes, like himself, were the vassals of the Parthian king. At first his operations were disregarded, and not until he had made himself the lord of a considerable territory was he summoned by his suzerain to explain his encroachments. His reply was a defiance and a challenge to battle. In the war which ensued Artabanus was overthrown by Ardeshír, and the Parthian dynasty of the Arsacidae was replaced by that of the Sassanidae (c. 227). The Persian now assumed the title of Shahinshah, that is "King of Kings," which had usually been affected by the potentates of all Iran, and established himself at the Parthian capital of Ctesiphon on the Tigris, a position more suitable for the seat of government than the remote Persepolis. The empire thus regenerated by the Sassanians, held its own among the surrounding powers for four hundred years, until the general irruption over Asia of the fanatical hosts of Islam.[24]

The dominions of Ardeshír and his successors covered an area almost equal to that of the Eastern Empire, but were probably much less populous. The table-land of Iran is far from being so well adapted for the sustentation of animal and vegetable life as the countries amalgamated into a single state by the Roman arms. More than a fourth of the surface is occupied by desert and salt swamps;[25] while the greater portion of the remainder is broken up by immense mountain ranges, some of which rise to a height of 18,000 feet. The prevailing population of this region within the historic period has always been a division of the Aryan race, of the great Indo-Germanic family of mankind, who at some early epoch spread themselves across two continents, from the frontiers of Burmah to the Atlantic seaboard of Europe. Originally the possessors of a common language, the elements of their speech are to be found in the Sanskrit, once colloquial throughout the valley of the Ganges, and in the Erse of the Irish peasant, who inhabits the wilds of Connemara. Although the face of the country has been scarred by the march of numerous invaders, and even by religious revolution, the sociological condition of these Eastern lands has scarcely changed at all during the millenniums of recorded history; and the Persian citizen or rustic of to-day is almost a counterpart of those who looked out on the progresses of Darius and Xerxes.[26] The primitive Iranians were an agricultural people, and as such showed an attachment to the cattle which composed their farm stock almost amounting to veneration. But the tiller of the soil in Iran was often exposed to harsh conditions in the effort to draw his livelihood from the ground. The land was not uniformly fertile, climatic severity not seldom hampered the labourer, and predatory bands of nomads, who raided the country from the north, were a frequent cause of disaster.[27] Life was a series of vicissitudes, circumstances of time and place were in general sharply contrasted, and the normal activities of nature seemed to the peaceful native to be the outcome of perpetual strife between spirits of good and evil. In Bactria, the north-eastern tract of Iran, all these conditions were most typically presented. About 1000 B.C. that region was ruled by King Vistaspa,[28] under whom flourished the prophet Zarathushtra, the original redactor of the religion and ethical system accepted by the Persians. He gave a distinct expression to the philosophical tendencies of his age, and refined the loose polytheistic conceptions at first held by the Aryans to the complete dualism in which Ahura-Mazda, the Lord of Wisdom, and Angra-Mainyu, the Devisor of Evil, became the essential factors of a definite theological faith.[29] On this foundation an Avesta or Bible of Mazdeism was elaborated, which laid down the law for the whole conduct of human life.[30] Among the primitive deities most reverence had been paid to Mithra, the sun-god, to Spenta Aramaiti, the earth spirit, and to Anahita, the goddess of the waters.[31] As subordinates of Ahura-Mazda, these divinities still held an established place, and were made the immediate objects of the rites and ceremonies imposed on the pious Iranian. Hence the sanctity of fire, earth, and water became an article of faith, and it was believed to be a heinous crime to contaminate them with any impurity. Whatever was evil was esteemed to be impure, and, therefore, the work of Angra-Mainyu. The Druj Nasu, a female demon, personifying the lie, was regarded as his universal agent, and as being present imminently under all adverse circumstances. Such were the principles of Mazdeism, the rigid application of which, and they were rigidly applied by the Magi, was productive of many curious sociological phenomena strangely at variance with the customs of other nations.[32] Death was considered to be the greatest of calamities, and hence a corpse became possessed of the Druj, and the most active of all sources of contamination. That so foul an object should be placed in intimate contact with the holy elements of fire, earth, or water, was sacrilege in the highest degree. Cremation and burial were, therefore, held in abhorrence, and a deceased person had to be borne to some isolated spot, far from fire and water, there to be exposed on an elevated bier with the intention that the flesh should be devoured by wild dogs, birds, etc.[33] Disease was, of course, a grade of demoniacal obsession, so that sympathy for the sick was almost alienated by superstition. If an ordinary soldier were taken ill on the march he was abandoned by the wayside, some provisions being left with him, and also a stick, with which to beat off any carnivorous animals. Should he recover, on his reappearance all fled from him as from an apparition risen out of the infernal regions; nor could he resume intercourse with his relations until he had undergone a rigorous purification by the Magi.[34] Owing to the holiness of water great reverence was felt for rivers, which were protected by law from all defilement; and no good Zoroastrian would travel by ship lest he should pollute the sea with his normal excrement.[35] For purposes of cleansing water was used very charily, and it was sinful to take a bath.[36] The vegetable productions of the earth were viewed with profound admiration, wherefore the cultivation of gardens and parks was among the greatest delights of the Persians.[37] The estimation in which cattle were held was the cause of some singular legislation and ritual enactments. Thus the urine of the cow was habitually collected and made use of daily for the purification of the body by washing.[38] The sheep-dog was an object of extreme solicitude, so much so that the penalty exacted for manslaughter was only half as onerous as that inflicted for the crime of giving bad food to such a precious animal,[39] but even the latter was a mild offence compared with the infamy of killing a water-dog, the name by which the otter was identified, as the wretch convicted was sentenced to be beaten to death.[40] On the other hand, noxious animals were regarded as the creation of Angra-Mainyu, and the Magi made it a religious duty to kill them with their own hands, especially ants, serpents, reptiles in general, and certain birds.[41] In some cases it was permitted to the subject to take the law into his own hands and to slay the guilty person on the spot. Such culprits were the highwayman, the sodomite, the prostitute, and anyone caught in the act of burning a corpse.[42] On the whole, however, capital punishment was infrequent, and almost any trespass, even murder, could be atoned for by making a money payment to the Magi.[43]

In the sociology of Mazdeism the strangest phenomenon that developed itself was the tenet that affinity by blood was the highest requisite in a marriage contract. This principle was inculcated by the priests to an extreme degree, so that the closer the relationship the more acceptable was the union affirmed to be in the eyes of the Deity. Not only could brother and sister marry under religious sanction, but even father and daughter;[44] and, most repugnant of all to the common inclinations of humanity, the nuptials of mother and son were expressly enjoined as a righteous act by the Avesta. This anomalous association of the sexes was justified partly by the false analogy of certain physiological facts supplied by the animal kingdom, and partly by an appeal to precedents to be found in the Iranian mythology. Hybrids were notoriously infertile, and the congress of horses with asses engendered mules who were impotent to propagate their kind. Hence the mingling of family blood was indicated as essential to preserving the integrity of the race. Further, it was pointed out that the primaeval man, Gaya Maretan, impregnated Spenta Aramaiti; that is, his mother earth, the result of this conjunction being a son and a daughter. By this union the brother and sister became the progenitors of the whole human race. At least one Parthian, and probably several of the Achaemenian and Sassanian kings, may be noted as having chosen their own mother for their consort on the throne.[45] Such marriages were not merely ceremonial, although in some instances the chief inducement may have been to insure the support of the Magi for a disputed succession.[46] Incestuous offspring were not unknown, and the case of Sisimithres, a provincial potentate subdued by Alexander, is specially mentioned as that of one whose mother-wife had borne him two sons.[47] Rich Persians indulged themselves with several wives, besides maintaining numerous concubines, but, as monogamy only was contemplated by the Avesta, the senior wife was the undisputed mistress of the household.[48]

The Parthians found it politic to assimilate their supremacy to that of the Greeks whom they had displaced; and thus to attract to themselves the influence which had so recently been predominant throughout Iran. They, therefore, distinguished themselves by the epithet of "Philhellen," and continued to impress their coins in Greek characters with that affix, even after the Romans had become most potent in the East. By degrees, however, the memory of the Greek dominion faded, and before the middle of the second Christian century orientalism was completely re-established. Legends in the Pahlavi, or Parthian language, were adopted for the superscription of the currency, upon which the Hellenized Serapis now yielded his place to Mithras or the Mazdean fire-altar.[49] As a scion of the house of Sásán, Ardeshír was naturally much swayed by priestly influence, and relied on the support of the Magi as the chief element of his power. By his edicts and inscriptions he proclaimed himself to be a Mazdayasn, or devout servant of Ahura-Mazda, and the dynasty he founded was always noted for its firm adherence to the national religion.[50] On his accession Ardeshír undertook the restoration of the Avesta, a great part of which had been neglected or altogether lost, and under the supervision of the Magi he caused a purification or reformation of the faith of Zarathushtra to be begun.[51] This work was continued by his successors, but, as no canon of scripture had been formed, there were many conflicting sects, and not until the reign of Sapor II[52] (c. 330) was the text of the sacred book fixed beyond dispute. Then Adarbâd, a holy man, produced his recension of the Avesta among the assembled Magi, and offered to submit himself to the ordeal of fire in proof of its strict orthodoxy. Molten brass was poured upon his breast, he passed the test unscathed, and his reading of the tenets of Mazdeism was never afterwards contested.[53]

Ardeshír did not, however, base his message of fortune solely on an appeal to the mystical emotions of his nation; but he also sought to attach them to himself by stimulating their patriotism. He professed that he would avenge the murder of Darius on the inheritors of Alexander, and asserted himself to be the rightful ruler of all western Asia, which had been unlawfully wrested from his ancestors. Thus the Persian empire, as restored by the Sassanians, was inspired with sentiments which urged it to maintain an inveterate conflict with Rome.[54]

Although there is evidence of constant religious commotion in Persia under the Sassanidae, it does not appear that any considerable number of the historical adherents of Zarathushtra ever swerved from their faith. The numerous priestly tribe of the Magi not only surrounded the throne, but were fully disseminated throughout the provinces as the guardians of Mazdeism. The valley of the Euphrates and Tigris, however, the most densely populated district of the empire, was the site of a very heterogeneous ethnology, with archaeological records which extend backwards for some thousands of years prior to the descent of the Arians into Iran. There had existed the kingdoms of Sumer and Akkad, having an ancient mythology of their own, which was liable to be diversified by the infiltration of Semitic elements from the south-west.[55] In this region Mani flourished and was enabled to spread his doctrines, but as soon as he threatened to pervert the loyal Zoroastrians his downfall was brought about by the resentment of the Magi.[56] Here also Christianity essayed to penetrate into Persia, but with the same result, and we possess some details of the cruel persecution to which Christians were subjected whenever they came into collision with the established religion of the state.[57] In some instances, however, Roman heretics, such as the Nestorians who fled before the face of an orthodox Emperor, were accorded an asylum in Persia by a politic Shah.[58]

Towards the end of the fifth century a serious ferment in the ranks of the Zoroastrians themselves was occasioned by the preaching of a fanatical demagogue named Mazdak. This reformer aimed at nothing less than a subversion of the existing sociological status by the induction of a communistic partage of women and property. All practical class distinctions were thus to be swept away, so that a level affluence should prevail throughout the land. It appears that in the early years of his reign Cavades found himself greatly hampered by the arrogant pretensions of his nobles, wherefore he lent a favourable ear to the new propaganda, and gave public encouragement to Mazdak. But the power of the throne was unequal for the achievement of such a revolution; the Magi and the nobles met in council, deposed Cavades, and, with some hesitation conceding to him his life, caused him to be imprisoned in a stronghold called the Castle of Oblivion. From this durance he was shortly released through the devotion of a handsome sister-wife, who seduced the fidelity of the gaoler by the promise of her person. Being allowed to sleep for one night in her brother's apartment, she had him carried out next morning enrolled in her bed-furniture, for the exemption of which from inspection she invented a plausible excuse.[59] Cavades now made good his escape to Bactria, where he spent a couple of years as a guest of the King of the Hephthalites. Ultimately he obtained the loan of an army from that monarch,[60] with which he drove his brother Jamâsp, who had been created king in the meantime, from the throne. As for Mazdak, it seems that for the next quarter of a century he was allowed a free hand to propagate his opinions, an attitude of neutrality being adopted by the Shah and the Magi. His gospel was accepted by an increasing number of the Iranians, whom he persuaded that his communism was the only mode of life which accorded with the precepts of Zarathushtra. At length the growing transformation of the social system began to be viewed with alarm; a generation of children had sprung up who were ignorant of their parentage, and in all directions the ownership of property was falling into abeyance.[61] It was resolved, therefore, by the Shah and priests in council that the Mazdakites should be extirpated by the sweeping Oriental device of a general massacre. In order to achieve this object an assemblage of all the members of the sect was convened by Chosroes, the designated heir to the crown, who had ingratiated himself with Mazdak and his disciples under the pretence of being a convert to their doctrines. It was represented that Cavades on a certain day would abdicate in favour of his son, who would at once reinstate the throne on the principle that for the future the Mazdakites should be its chief supporters. The ruse succeeded; Cavades received the leaders in state surrounded by the Magi, asserted his imminent retirement, and desired them to muster their whole following in a place apart. There Chosroes would join them and institute the new régime with due formality. They obeyed, and were immediately surrounded by a division of the army, who cut them to pieces. The remnants of the sect throughout the provinces were afterwards hunted down, and got rid of by burning at the stake.[62]

The moment we turn our attention to the Persian court, and begin to observe the material and ceremonial attributes of the monarch, we discover the prototype of almost the whole fabric of Byzantine state as displayed at Constantinople. In the East was found the model of those accretions which gradually transformed the unassuming Roman Emperor of the Tiber into the haughty autocrat who overawed his subjects with pageantry on the Bosphorus; but the native sobriety of Europe always stopped short of the pronounced extravagance and hyperbole of Orientalism. The throne of the Sassanians stood between four pillars which upheld a ciborium.[63] On sitting down, the Shahinshah inserted his head into the crown, a mass of precious metal and jewels suspended by a chain, too ponderous to be worn without extraneous support.[64] No epithet was too lofty for the Persian monarch to assume in his epistles; he was brother of the sun and moon, a god among men, and in merely mundane affairs the King of kings, the lord of all nations, as well as everything else expressive of unlimited power and success.[65] When he made a progress out of doors the streets were cleansed and decorated in the manner already described as customary during the passage of the Eastern Emperor.[66] Personal reverence was, of course, carried to the extreme point, and even officials of the highest rank kissed the ground before venturing to address the Shah.[67] The succession to the throne was strictly hereditary and, although several revolutions occurred during the four centuries of the Sassanian rule, in every instance the crown devolved to a prince of the blood of Ardeshír.[68]

A Persian army of this date was very similar to a Roman one, but there were some essential differences. With the exception of the Royal guards, which, like those of the Achaemenians, included a body of ten thousand, called "the Immortals,"[69] and necessary garrisons, a standing army was not maintained.[70] On each occasion, therefore, the fighting force had to be levied afresh whenever a campaign was in prospect, but, as a traditional part of Persian education was that every youth should be taught to ride and to become an efficient archer,[71] the new recruits were not necessarily deficient in military training. During a battle, in fact, they relied chiefly on their missiles, and a Persian horseman was provided with two bows and thirty arrows.[72] Less importance was attached to the infantry, but they also consisted of bands of archers. The cavalry were generally almost as numerous, and in addition a troop of elephants was often a prominent feature in a Persian army.[73]

The revenue of Persia previous to the sixth century was mainly derived from agricultural industry; and every inhabitant who cultivated the ground handed over to the state collectors a tithe of whatever economical growth his land produced. Cavades, however, from personal observation became impressed with the disadvantages of this system, which often seriously hampered his subjects in providing for their daily wants, and deprived them of the full benefit of the newly ripened crops.[74] Thus the rustic population feared to be accused of falsification if they ventured to supply their present needs before the arrival of an official whose duty it was to inspect the produce of the soil and of the fruit-bearing trees while still in position, and to deliver to them their note of assessment. Cavades, therefore, decided on the abolition of tithes in favour of a land-tax, a sweeping reform, beset with many difficulties, which engaged his attention for many years, and was only fully established by his successor.[75] With the inhabitants of towns and villages, who did not subsist by agriculture, the Persians adopted the usual expedient, in this age, of imposing a poll-tax.[76]