Reading: The End of the Republic and The Roman Empire

Christopher Brooks

The End of the Republic

The Roman Republic lasted for roughly five centuries. It was under the Republic that Rome evolved from a single town to the heart of an enormous empire. Despite the evident success of the republican system, however, there were inexorable problems that plagued the Republic throughout its history, most evidently the problem of wealth and power. Roman citizens were, by law, supposed to have a stake in the Republic. They took pride in who they were and it was the common patriotic desire to fight and expand the Republic among the citizen-soldiers of the Republic that created, at least in part, such an effective army. At the same time, the vast amount of wealth captured in the military campaigns was frequently siphoned off by elites, who found ways to seize large portions of land and loot with each campaign. By around 100 BCE even the existence of the Plebeian Assembly did almost nothing to mitigate the effect of the debt and poverty that afflicted so many Romans thanks to the power of the clientage networks overseen by powerful noble patrons.

The key factor behind the political stability of the Republic up until the aftermath of the Punic Wars was that there had never been open fighting between elite Romans in the name of political power. In a sense, Roman expansion (and especially the brutal wars against Carthage) had united the Romans; despite their constant political battles within the assemblies and the senate, it had never come to actual bloodshed. Likewise, a very strong component of Romanitas was the idea that political arguments were to be settled with debate and votes, not clubs and knives. Both that unity and that emphasis on peaceful conflict resolution within the Roman state itself began to crumble after the sack of Carthage.

The first step toward violent revolution in the Republic was the work of the Gracchus brothers – remembered historically as the Gracchi (i.e. “Gracchi” is the plural of “Gracchus”). The older of the two was Tiberius Gracchus, a rich but reform-minded politician. Gracchus, among others, was worried that the free, farm-owning common Roman would go extinct if the current trend of rich landowners seizing farms and replacing farmers with slaves continued. Without those commoners, Rome’s armies would be drastically weakened. Thus, he managed to pass a bill through the Centuriate Assembly that would limit the amount of land a single man could own, distributing the excess to the poor. The Senate was horrified and fought bitterly to reverse the bill. Tiberius ran for a second term as tribune, something no one had ever done up to that point, and a group of senators clubbed him to death in 133 BCE.

Tiberius’s brother Gaius Gracchus took up the cause, also becoming tribune. He attacked corruption in the provinces, allying himself with the equestrian class and allowing equestrians to serve on juries that tried corruption cases. He also tried to speed up land redistribution. His most radical move was to try to extend full citizenship to all of Rome’s Italian subjects, which would have effectively transformed the Roman Republic into the Italian Republic. Here, he lost even the support of his former allies in Rome, and he killed himself in 121 BCE rather than be murdered by another gang of killers sent by senators.

The reforms of the Gracchi were temporarily successful: even though they were both killed, the Gracchi’s central effort to redistribute land accomplished its goal. A land commission created by Tiberius remained intact until 118 BCE, by which time it had redistributed huge tracts of land held illegally by the rich. Despite their vociferous opposition, the rich did not suffer much, since the lands in question were “public lands” largely left in the aftermath of the Second Punic War, and normal farmers did enjoy benefits. Likewise, despite Gaius’s death, the Republic eventually granted citizenship to all Italians in 84 BCE, after being forced to put down a revolt in Italy. In hindsight, the historical importance of the Gracchi was less in their reforms and more in the manner of their deaths – for the first time, major Roman politicians had simply been murdered (or killed themselves rather than be murdered) for their politics. It became increasingly obvious that true power was shifting away from rhetoric and toward military might.

A contemporary of the Gracchi, a general named Gaius Marius, took further steps that eroded the traditional Republican system. Marius combined political savvy with effective military leadership. Marius was both a consul (elected an unprecedented seven times) and a general, and he used his power to eliminate the property requirement for membership in the army. This allowed the poor to join the army in return for nothing more than an oath of loyalty, one they swore to their general rather than to the Republic. Marius was popular with Roman commoners because he won consistent victories against enemies in both Africa and Germany, and because he distributed land and farms to his poor soldiers. This made him a people’s hero, and it terrified the nobility in Rome because he was able to bypass the usual Roman political machine and simply pay for his wars himself. His decision to eliminate the property requirement meant that his troops were totally dependent on him for loot and land distribution after campaigns, undermining their allegiance to the Republic.

A general named Sulla followed in Marius’s footsteps by recruiting soldiers directly and using his military power to bypass the government. In the aftermath of the Italian revolt of 88 – 84 BCE, the Assembly took Sulla’s command of Roman legions fighting the Parthians away and gave it to Marius in return for Marius’s support in enfranchising the people of the Italian cities. Sulla promptly marched on Rome with his army, forcing Marius to flee. Soon, however, Sulla left Rome to command legions against the army of the anti-Roman king Mithridates in the east. Marius promptly attacked with an army of his own, seizing Rome and murdering various supporters of Sulla. Marius himself soon died (of old age), but his followers remained united in an anti-Sulla coalition under a friend of Marius, Cinna.

After defeating Mithridates, Sulla returned and a full-scale civil war shook Rome in 83 – 82 BCE. It was horrendously bloody, with some 300,000 men joining the fighting and many thousands killed. After Sulla’s ultimate victory he had thousands of Marius’s supporters executed. In 81 BCE, Sulla was named dictator; he greatly strengthened the power of the Senate at the expense of the Plebeian Assembly, had his enemies in Rome murdered and their property seized, then retired to a life of debauchery in his private estate (and soon died from a disease he contracted). The problem for the Republic was that, even though Sulla ultimately proved that he was loyal to republican institutions, other generals might not be in the future. Sulla could have simply held onto power indefinitely thanks to the personal loyalty of his troops.

Julius Caesar

Thus, there is an unresolved question about the end of the Roman Republic: when a new politician and general named Julius Caesar became increasingly powerful and ultimately began to replace the Republic with an empire, was he merely making good on the threat posed by Marius and Sulla, or was there truly something unprecedented about his actions? Julius Caesar’s rise to power is a complex story that reveals just how murky Roman politics were by the time he became an important political player in about 70 BCE. Caesar himself was both a brilliant general and a shrewd politician; he was skilled at keeping up the appearance of loyalty to Rome’s ancient institutions while exploiting opportunities to advance and enrich himself and his family. He was loyal, in fact, to almost no one, even old friends who had supported him, and he also cynically used the support of the poor for his own gain.

Two powerful politicians, Pompey and Crassus (both of whom had risen to prominence as supporters of Sulla), joined together to crush the slave revolt of Spartacus in 70 BCE and were elected consuls because of their success. Pompey was one of the greatest Roman generals, and he soon left to eliminate piracy from the Mediterranean, to conquer the Jewish kingdom of Judea, and to crush an ongoing revolt in Anatolia. He returned in 67 BCE and asked the Senate to approve land grants to his loyal soldiers for their service, a request that the Senate refused because it feared his power and influence with so many soldiers who were loyal to him instead of the Republic. Pompey reacted by forming an alliance with Crassus and with Julius Caesar, who was a member of an ancient patrician family. This group of three is known in history as the First Triumvirate.


Busts of the members of the First Triumvirate: Caesar, Crassus, and Pompey.

Each member of the Triumvirate wanted something specific: Caesar hungered for glory and wealth and hoped to be appointed to lead Roman armies against the Celts in Western Europe, Crassus wanted to lead armies against Parthia (i.e. the “new” Persian Empire that had long since overthrown Seleucid rule in Persia itself), and Pompey wanted the Senate to authorize land and wealth for his troops. The three of them had so many clients and wielded so much political power that they were able to ratify all of Pompey’s demands, and both Caesar and Crassus received the military commissions they hoped for. Caesar was appointed general of the territory of Gaul (present-day France and Belgium) and he set off to fight an infamous Celtic king named Vercingetorix.

From 58 to 50 BCE, Caesar waged a brutal war against the Celts of Gaul. He was both a merciless combatant, who slaughtered whole villages and enslaved hundreds of thousands of Celts (killing or enslaving over a million people in the end), and a gifted writer who wrote his own accounts of his wars in excellent Latin prose. His forces even invaded England, establishing a Roman territory there that lasted centuries. All of the lands he invaded were so thoroughly conquered that the descendants of the Celts ended up speaking languages based on Latin, like French, rather than their native Celtic dialects.

Caesar’s victories made him famous and immensely powerful, and they ensured the loyalty of his battle-hardened troops. In Rome, senators feared his power and called on Caesar’s former ally Pompey to bring him to heel (Crassus had already died in his ill-considered campaign against the Parthians; his head was used as a prop in a Greek play staged by the Parthian king). Pompey, fearing his former ally’s power, agreed and brought his armies to Rome. The Senate then recalled Caesar after refusing to renew his governorship of Gaul and his military command, or allowing him to run for consul in absentia.

The Senate hoped to use the fact that Caesar had violated the letter of republican law while on campaign to strip him of his authority. Caesar had committed illegal acts, including waging war without authorization from the Senate, but he was protected from prosecution so long as he held an authorized military command. By refusing to renew his command or allow him to run for office as consul, he would be open to charges. His enemies in the Senate feared his tremendous influence with the people of Rome, so the conflict was as much about factional infighting among the senators as fear of Caesar imposing some kind of tyranny.

Caesar knew what awaited him in Rome – charges of sedition against the Republic – so he simply took his army with him and marched off to Rome. In 49 BCE, he dared to cross the Rubicon River in northern Italy, the legal boundary over which no Roman general was allowed to bring his troops; he reputedly announced that “the die is cast” and that he and his men were now committed to either seizing power or facing total defeat. The brilliance of Caesar’s move was that he could pose as the champion of his loyal troops as well as that of the common people of Rome, whom he promised to aid against the corrupt and arrogant senators; he never claimed to be acting for himself, but instead to protect his and his men’s legal rights and to resist the corruption of the Senate.

Pompey had been the most powerful man in Rome, both a brilliant general and a gifted politician, but he did not anticipate Caesar’s boldness. Caesar surprised him by marching straight for Rome. Pompey only had two legions, both of whom had served under Caesar in the past and, and he was thus forced to recruit new troops. As Caesar approached, Pompey fled to Greece, but Caesar followed him and defeated his forces in battle in 48 BCE. Pompey himself escaped to Egypt, where he was promptly murdered by agents of the Ptolemaic court who had read the proverbial writing on the wall and knew that Caesar was the new power to contend with in Rome. Subsequently, Caesar came to Egypt and stayed long enough to forge a political alliance, and carry on an affair, with the queen of Egypt: Cleopatra VII, last of the Ptolemaic dynasty. Caesar helped Cleopatra defeat her brother (to whom she was married, in the Egyptian tradition) in a civil war and to seize complete control over the Egyptian state. She also bore him his only son, Caesarion.

Caesar returned to Rome two years later after hunting down Pompey’s remaining loyalists. There, he had himself declared dictator for life and set about creating a new version of the Roman government that answered directly to him. He filled the Senate with his supporters and established military colonies in the lands he had conquered as rewards for his loyal troops (which doubled as guarantors of Roman power in those lands, since veterans and their families would now live there permanently). He established a new calendar, which included the month of “July” named after him, and he regularized Roman currency. Then he promptly set about making plans to launch a massive invasion of Persia.

Instead of leading another glorious military campaign, however, in March of 44 BCE Caesar was assassinated by a group of senators who resented his power and genuinely desired to save the Republic. The result was not the restoration of the Republic, however, just a new chapter in the Caesarian dictatorship. Its architect was Caesar’s heir, his grand-nephew Octavian, to whom Caesar left (much to almost everyone’s shock) almost all of his vast wealth.

Mark Antony and Octavian

Following his death, Caesar’s right-hand man, a skilled general named Mark Antony, joined with Octavian and another general named Lepidus to form the “Second Triumvirate.” In 43 BCE they seized control in Rome and then launched a successful campaign against the old republican loyalists, killing off the men who had killed Caesar and murdering the strongest senators and equestrians who had tried to restore the old institutions. Mark Antony and Octavian soon pushed Lepidus to the side and divided up control of Roman territory – Octavian taking Europe and Mark Antony taking the eastern territories and Egypt. This was an arrangement that was not destined to last; the two men had only been allies for the sake of convenience, and both began scheming as to how they could seize total control of Rome’s vast empire.

Mark Antony moved to the Egyptian city of Alexandria, where he set up his court. He followed in Caesar’s footsteps by forging both a political alliance and a romantic relationship with Cleopatra, and the two of them were able to rule the eastern provinces of the Republic in defiance of Octavian. In 34 BCE, Mark Antony and Cleopatra declared that Cleopatra’s son by Julius Caesar, Caesarion, was the heir to Caesar (not Octavian), and that their own twins were to be rulers of Roman provinces. Rumors in the west claimed that Antony was under Cleopatra’s thumb (which is unlikely: the two of them were both savvy politicians and seem to have shared a genuine affection for one another) and was breaking with traditional Roman values, and Octavian seized on this behavior to claim that he was the true protector of Roman morality. Soon, Octavian produced a will that Mark Antony had supposedly written ceding control of Rome to Cleopatra and their children on his death; whether or not the will was authentic, it fit in perfectly with the publicity campaign on Octavian’s part to build support against his former ally in Rome.


A dedication featuring Cleopatra VII making an offering to the Egyptian goddess Isis. Note the remarkable mix of Egyptian and Greek styles: the image is in keeping with traditional Egyptian carvings, and Isis is an ancient Egyptian goddess, but the dedication itself is written in Greek.

When he finally declared war in 32 BCE, Octavian claimed he was only interested in defeating Cleopatra, which led to broader Roman support because it was not immediately stated that it was yet another Roman civil war. Antony and Cleopatra’s forces were already fairly scattered and weak due to a disastrous campaign against the Persians a few years earlier. In 31 BCE, Octavian defeated Mark Antony’s forces, which were poorly equipped, sick, and hungry. Antony and Cleopatra’s soldiers were starved out by a successful blockade engineered by Octavian and his friend and chief commander Agrippa, and the unhappy couple killed themselves the next year in exile. Octavian was 33. As his grand-uncle had before him, Octavian began the process of manipulating the institutions of the Republic to transform it into something else entirely: an empire.

When Octavian succeeded in defeating Marc Antony, he removed the last obstacle to his own control of Rome’s vast territories. While paying lip service to the idea that the Republic still survived, he in fact replaced the republican system with one in which a single sovereign ruled over the Roman state. In doing so he founded the Roman Empire, a political entity that would survive for almost five centuries in the west and over a thousand years in the east.

This system was called the Principate, rule by the “First.” Likewise, although “Caesar” had originally simply been the family name of Julius Caesar’s line, “Caesar” came to be synonymous with the emperor himself by the end of the first century CE. The Roman terms for rule would last into the twentieth century CE: the imperial titles of the rulers of both Russia and Germany – “Tsar” and “Kaiser” – meant “Caesar.” In turn, the English word “emperor” derives from imperator, the title of a victorious Roman general in the field, which was adopted as yet another honorific by the Roman emperors. The English word “prince” is another Romanism, from Princeps Civitatis, “First Citizen,” the term that Augustus invented for himself. For the sake of clarity, this chapter will use the anglicized term “emperor” to refer to all of the leaders of the Roman imperial system.


The height of Roman power coincided with the first two hundred years of the Roman Empire, a period that was remembered as the Pax Romana: the Roman Peace. It was possible during the period of the Roman Empire’s height, from about 1 CE to 200 CE, to travel from the Atlantic coast of Spain or Morocco all the way to Mesopotamia using good roads, speaking a common language, and enjoying official protection from banditry. The Roman Empire was as rich, powerful, and glorious as any in history up to that point, but it also represented oppression and imperialism to slaves, poor commoners, and conquered peoples.

Octavian was unquestionably the architect of the Roman Empire. Unlike his great-uncle, Julius Caesar, Octavian eliminated all political rivals and set up a permanent hereditary emperorship. All the while, he claimed to be restoring not just peace and prosperity, but the Republic itself. Since the term Rex (king) would have been odious to his fellow Romans, Augustus instead referred to himself as Princeps Civitatus, meaning “first citizen.” He used the Senate to maintain a facade of republican rule, instructing senators on the actions they were to take; a good example is that the Senate “asked” him to remain consul for life, which he graciously accepted. By 23 BCE, he assumed the position of tribune for life, the position that allowed unlimited power in making or vetoing legislation. All soldiers swore personal oaths of loyalty to him, and having conquered Egypt from his former ally Mark Antony, Augustus was worshiped there as the latest pharaoh. The Senate awarded Octavian the honorific Augustus: “illustrious” or “semi-divine.” It is by that name, Augustus Caesar, that he is best remembered.

Despite his obvious personal power, Augustus found it useful to maintain the facade of the Republic, along with republican values like thrift, honesty, bravery, and honor. He instituted strong moralistic laws that penalized (elite) young men who tried to avoid marriage and he celebrated the piety and loyalty of conservative married women. Even as he converted the government from a republic to a bureaucratic tool of his own will, he insisted on traditional republican beliefs and republican culture. This no doubt reflected his own conservative tastes, but it also eased the transition from republic to autocracy for the traditional Roman elites.

As Augustus’s powers grew, he received an altogether novel legal status, imperium majus, that was something like access to the extraordinary powers of a dictator under the Republic. Combined with his ongoing tribuneship and direct rule over the provinces in which most of the Roman army was garrisoned at the time, Augustus’s practical control of the Roman state was unchecked. As a whole, the legal categories used to explain and excuse the reality of Augustus’s vast powers worked well during his administration, but sometimes proved a major problem with later emperors because few were as competent as he had been. Subsequent emperors sometimes behaved as if the laws were truly irrelevant to their own conduct, and the formal relationship between emperor and law was never explicitly defined. Emperors who respected Roman laws and traditions won prestige and veneration for having done so, but there was never a formal legal challenge to imperial authority. Likewise, as the centuries went on and many emperors came to seize power through force, it was painfully apparent that the letter of the law was less important than the personal power of a given emperor in all too many cases.


One of the more spectacular surviving statues of Augustus. Augustus was, among other things, a master of propaganda, commissioning numerous statues and busts of himself to be installed across the empire.

This extraordinary power did not prompt resistance in large part because the practical reforms Augustus introduced were effective. He transformed the Senate and equestrian class into a real civil service to manage the enormous empire. He eliminated tax farming and replaced it with taxation through salaried officials. He instituted a regular messenger service. His forces even attacked Ethiopia in retaliation for attacks on Egypt and he received ambassadors from India and Scythia (present-day Ukraine). In short, he supervised the consolidation of Roman power after the decades of civil war and struggle that preceded his takeover, and the large majority of Romans and Roman subjects alike were content with the demise of the Republic because of the improved stability Augustus’s reign represented. Only one major failure marred his rule: three legions (perhaps as many as 20,000 soldiers) were destroyed in a gigantic ambush in the forests of Germany in 9 CE, halting any attempt to expand Roman power past the Rhine and Danube rivers. Despite that disaster, after Augustus’s death the senate voted to deify him: like his great-uncle Julius, he was now to be worshipped as a god.

The Imperial Dynasties

The period of the Pax Romana included three distinct dynasties:

The Julian dynasty: 14 – 68 CE – those emperors related (by blood or adoption) to Caesar’s line.

The Flavian dynasty: 69 – 96 CE – a father and his two sons who seized power after a brief civil war.

The “Five Good Emperors”: 96 – 180 CE – a “dynasty” of emperors who chose their successors, rather than power passing to their family members.

The Julian Dynasty

There is a simple and vexing problem with any discussion of the Roman emperors: the sources. While archaeology and the surviving written sources create a reasonably clear basis for understanding the major political events of the Julian dynasty, the biographical details are much more difficult. All of the surviving written accounts about the lives of the Julian emperors were written many decades, in some cases more than a century, after their reign. In turn, the two most important biographers, Tacitus and Suetonius, detested the actions and the character of the Julians, and thus their accounts are rife with scandalous anecdotes that may or may not have any basis in historical truth (Tacitus is universally regarded as the more reliable, although Suetonius’s The Twelve Caesars does make for very entertaining reading). Thus, the biographical sketches below are an attempt to summarize what is known for sure, along with some notes on the scandalous assertions that may be at least partly fabricated.

When Augustus died in 14 CE, his stepson Tiberius (r. 14 – 37 CE) became emperor. While it was possible that the Senate might have tried to reassert its power, there was no political will to do so. Only idealistic or embittered senators really dreamed of restoring the Republic, and a coup would have been rejected by the vast majority of Roman citizens. Under the Caesars, after all, the empire had never been more powerful or wealthy. Genuine concessions had been made to the common people, especially soldiers, and the only people who really lost out in the short term were the old elite families of patricians, who no longer had political power independent of the emperor (although they certainly retained their wealth and status).

Tiberius began his rule as a cautious leader who put on a show of only reluctantly following in Augustus’s footsteps as emperor. He was a reasonably competent emperor for over a decade, delegating decisions to the Senate and ensuring that the empire remained secure and financially solvent. In addition, he oversaw a momentous change to the priorities of the Roman state: the Roman Empire no longer embarked on a sustained campaign of expansion as it had done ever since the early decades of the Republic half a millennium earlier. This does not appear to have been a conscious policy choice on the part of Tiberius, but instead a shift in priorities: the Senate was now staffed by land-owning elites who did not predicate their identities on warfare, and Tiberius himself saw little benefit in warring against Persia or invading Germany (he also feared that successful generals might threaten his power, at one point ordering one to call off a war in Germany). The Roman Empire would continue to expand at times in the following centuries, but never to the degree or at the pace that it had under the Republic.

Eventually, Tiberius retreated to a private estate on the island of Capri (off the west coast of Italy). Suetonius’s biography would have it that on Capri, Tiberius indulged his penchant for bloodshed and sexual abuse, which is highly questionable – what is not questionable is that Tiberius became embittered and suspicious, ordering the murders of various would-be claimants to his throne back in Rome, and sometimes ignoring affairs of state. When he died, much to the relief of the Roman populace, great hopes were pinned on his heir.

That heir was Gaius (r. 37 – 41 CE), much better known as “Caligula,” literally meaning “little boots” but which translates best as “bootsie.” As a boy, Caligula moved with his father, a famous and well-liked general related by marriage to the Julians, from army camp to army camp. While he did so he liked to dress up in miniature legionnaire combat boots; hence, he was affectionately dubbed “Bootsie” by the troops (one notable translation of the work of Suetonius by Robert Graves translates Caligula as “Bootikins” instead).

Even if some of the stories of his personal sadism are exaggerated, there is no doubt that Caligula was a disastrous emperor. According to the biographers, Caligula quickly earned a reputation for cruelty and megalomania, enjoying executions (or simple murders) as forms of entertainment and spending vast sums on shows of power. Convinced of his own godhood, Caligula had the heads of statues of the gods removed and replaced with his own head. He liked to appear in public dressed as various gods or goddesses; one of his high priests was his horse, Incitatus, whom he supposedly appointed as a Roman consul. He staged an invasion of northern Gaul of no tactical significance which culminated in a Triumph (military parade, traditionally one of the greatest demonstrations of power and glory of a victorious general) back in Rome.

Much of the scandalous gossip about him, historically, is because he was unquestionably the enemy of the Senate, seeing potential traitors everywhere and inflicting waves of executions against former supporters. He used trials for treason to enrich himself after squandering the treasury on buildings and public games. He also made senators wait on him dressed as slaves, and demanded that he be addressed as “dominus et deus,” meaning “master and god.” He was finally murdered by a group of senators and guardsmen.

The next emperor was Claudius (r. 41 – 54 CE), the one truly competent emperor of the Julian line after Augustus. Claudius had survived palace intrigues because he walked with a limp and spoke with a pronounced stutter; he was widely considered to be a simpleton, whereas he was actually highly intelligent. Once in power Claudius proved himself a competent and refreshingly sane emperor, ending the waves of terror Caligula had unleashed. He went on to oversee the conquest of England, first begun by Julius Caesar decades earlier. He was also a scholar, mastering the Etruscan and Punic languages and writing histories of those two civilizations (the histories are now lost, unfortunately). He restored the imperial treasury, depleted by Tiberius and Caligula, and maintained the Roman borders. He also established a true bureaucracy to manage the vast empire and began the process of formally distinguishing between the personal wealth of the emperor and the official budget of the Roman state.

According to Roman historians, Claudius was eventually betrayed and poisoned by his wife, who sought to have her son from another marriage become emperor. That son was Nero. Nero (r. 54 – 68 CE) was another Julian who acquired a terrible historical reputation; while he was fairly popular during his first few years as emperor, he eventually succumbed to a Caligula-like tendency of having elite Romans (including his domineering mother) killed. In 64 CE, a huge fire nearly destroyed the city, which was largely built out of wood. This led to the legend of Nero “playing his fiddle while Rome burned” – in fact, in the fire’s aftermath Nero had shelters built for the homeless and set about rebuilding the roughly half of the city that had been destroyed, using concrete buildings and grid-based streets. That said, he did use space cleared by the fire to begin the construction of a gigantic new palace in the middle of Rome called the “golden house,” into which he poured state revenues.

Nero’s terrible reputation arose from the fact that he unquestionably hounded and persecuted elite Romans, using a law called the Maiestas that made it illegal to slander the emperor to extract huge amounts of money from senators and equestrians. He also ordered imagined rivals and former advisors to kill themselves, probably out of mere jealousy. Besides Roman elites, his other major target was the early Christian movement, whom he blamed for the fire in Rome and whom he relentlessly persecuted (thousands were killed in the gladiatorial arena, ripped apart by wild animals). Thus, the two groups in the position to write Nero’s history – elite Romans and early Christians – had every reason to hate him. In addition, Nero took great pride in being an actor and musician, two professions that were considered by Roman elites to be akin to prostitution. His artistic indulgences were thus scandalous violations of elite sensibilities. After completely losing the support of both the army and the Senate, Nero committed suicide in 68 CE.

Another note on the sources: what the “bad” emperors of the Julian line (Tiberius, Caligula, and Nero) had in common is that they violated the old traditions of Romanitas, squandering wealth and glorifying themselves in various ways, thus inspiring hostility from many elite Romans. Since it was other elite Romans (albeit many years later) who became their biographers, we in the present cannot help but have a skewed view of their conduct. Historians have rehabilitated much of the rule of Tiberius and (to a lesser extent) Nero in particular, arguing that even if they were at loggerheads with the Senate at various times and probably did unfairly prosecute at least some senators, they did a decent job of running the empire as well.

The Flavian Dynasty

In the aftermath of Nero’s death, a brief civil war broke out. Four generals competed for the emperorship, supported by their armies. In the end, a general named Vespasian (r. 69 – 79 CE) seized power and founded a fairly short-lived dynasty consisting of himself and his two sons, known to history as the Flavians. The importance of Vespasian’s takeover was that it reinforced the idea that real power in Rome was no longer that of the old power-broking families, but instead the armies; Vespasian had no legal claim to the throne, but his emperorship was ratified by the Senate nevertheless. The emperor’s major concern had to be maintaining the loyalty of the armies above all else, because they could and would openly fight to put their man on the throne in a time of crisis – this occurred numerous times in the centuries to come.

Vespasian was one of the great emperors of the early empire. He pulled state finances back from the terrible state they had been left in by Nero and restored the relationship between the emperor and the Roman elite; it certainly did not hurt his reputation that he was a successful general, one of the traditional sources of status among Roman leaders. He was also renowned for his openness and his grounded outlook. Reputably, he did not keep a guard and let people speak to him directly in public audiences. In an act of classic Romanitas, he started work on the famous Colosseum (known at the time as the Flavian Amphitheater) in Rome in order to provide a grand setting for public games and performances. All of this happened in just a decade; he died of natural causes in 79 CE.


The outside of the Colosseum in present-day Rome.

Vespasian’s older son Titus (r. 79 – 81 CE) had been groomed to follow his father and began as a promising and competent emperor. Unfortunately, almost as soon as he took the throne a volcano in southern Italy, Mt. Vesuvius, erupted, followed shortly by another huge fire as well as an epidemic in Rome. Titus struggled to aid victims of all three disasters, but was then struck by fever and died in 81 CE.

Vespasian’s second son, Domitian (r. 81 – 96 CE), who was not “supposed” to take the throne, proved to be a terrible ruler. He created an atmosphere of terror in elite Roman circles in an effort to watch out for potential rebels, murdering senators and elites he suspected. He adopted a Caligula-like concern for glorifying himself (like Caligula, he insisted that he be addressed as “dominus et deus”) and liked to appear before the senate in the armor of a Roman commander returning from victory. He was moralistic about both sex and the divinity of the emperors, instituting the policy that all oaths had to be sword to the godhood of the emperor. About the only positive undertaking in his rule was major building projects, both for palaces for himself and public works (including roads and fortifications), and it is also worth noting that the empire remained under a stable administration during his reign. That noted, Domitian became increasingly paranoid and violent between 89 and 96 CE, until he was finally killed by assassins in the palace.

The “Five Good Emperors” and the Severans

Following the work of the great eighteenth-century English historian Edward Gibbon, historians frequently refer to the rulers of the Roman Empire who followed the death of Domitian as the “Five Good Emperors,” those who successfully managed the Empire at its height. For almost a century, emperors appointed their own successors from the most competent members of the younger generation of Roman elites. Not least because none of them (except the last, to disastrous consequences) had surviving direct heirs of their own, each emperor would adopt a younger man as his son, thereby ensuring his succession. Rome prospered during this period under this relatively meritocratic system of political succession. It was under one of these emperors, Trajan, that the empire achieved its greatest territorial expanse.

One of the important aspects of the behavior of the “good emperors” is that they fit the model of a “philosopher-king” first described by Plato centuries earlier. Even though monarchy had been repugnant to earlier Romans, during the period of the Republic, the good emperors tried to live and act according to traditional Roman Romanitas, undertaking actions not only for their own glorification but for the good of the Roman state. The borders were maintained (or, as under Trajan, expanded), public works and infrastructure built, and infighting among elites kept to a minimum.

Trajan’s accomplishments deserve special mention, not only because of his success in expanding the Empire, but in how he governed it. He was a fastidious and straightforward administrator, focusing his considerable energies on the practical business of rule. He personally responded to requests and correspondence, he instituted a program of inexpensive loans to farmers and used the interest to pay for food for poor children, and he worked closely and successfully with the Senate to maintain stability and imperial solvency. The fact that personally led the legions on major military campaigns capped his reign in the military glory expected of an emperor following the rule of the Flavians, but he was remembered at least as well for his skill as a leader in peacetime.

The next two emperors, Hadrian and Antoninus Pius, did not win comparable military glory, but they did defend the borders (Hadrian gave up Trajan’s conquests in Mesopotamia to do so, recognizing that they were unsustainable), oversaw major building projects, and maintained Roman stability. Hadrian spent much of his reign touring the Roman provinces, particularly Greece. It was clear by his reign that the emperor’s authority was practically limitless, with both emperors issuing imperial proclamations known as “rescripts” while away from Rome that carried the force of law.

This period of successful rule eventually broke down when the practice of choosing a competent follower ended – the emperor Marcus Aurelius, a brilliant leader and Stoic philosopher (161 – 180 CE) named his arrogant and foolish son Commodus (r. 177 – 192 CE) his co-emperor three years before Aurelius’s death. Storm clouds had already been gathering under Aurelius, who found himself obliged to lead military campaigns against incursions of Germanic tribes in the north despite his own lack of a military background (or, really, temperament). He had, however, been a scrupulously efficient and focused political leader. His decision to make Commodus his heir was due to a simple fact: Aurelius was the first of the Five Good Emperors to have a biological son who survived to adulthood. As emperor, Commodus indulged his taste for debauchery and ignored affairs of state, finally being assassinated after twelve years of incompetence.

One last dynasty emerged in the aftermath of Commodus’s death, that of the Severans who ruled from 192 – 235 CE. They faced growing threats on the Roman borders, as Germanic tribes staged repeated (and often at least temporarily successful) incursions to the north and a new Persian dynasty known as the Sasanians pressed against Roman territory to the east. The last Severan emperor, Severus Alexander, died in 235 CE, ushering in a terrible period of military defeat and instability considered in the next chapter.

Beyond The Empire

As noted above, by the year 117 CE under Trajan the Empire reached its greatest size. It encompassed most of England across to Germany and Romania, all of North Africa from present-day Morocco, and extended to the borders of the Persian Empire. Beyond these borders were “barbarians” of various kinds; as far as the Romans were concerned there were no civilized people outside of their borders except the Persians. Trajan’s successor, the emperor Hadrian, built an enormous series of fortifications to consolidate power on the frontiers – these were eventually (by the third century CE) known as the limes, permanent garrisons and fortresses that were meant to serve as barriers to prevent “barbarian” incursions. Some of these survive to the present, including Hadrian’s Wall in northern England. While fleets patrolled the rivers and oceans, these garrisons controlled access to the empire.


The Empire at the height of its territorial expanse under Trajan in 117 CE.

As far as the Romans were concerned, there were only two things beyond those borders: to the north and northeast, endless tracts of inhospitable land and semi-human barbarians like the Germanic tribes, and to the east, the only other civilization Rome was prepared to recognize: the Persians, ruled first by the Parthians and then the Sasanians. For the rest of the Roman Imperial period, Rome and Persia periodically engaged in both raiding and full-scale warfare, with neither side proving capable of conclusively defeating the other.


The most important, and threatening, border for Rome was to its north, on the eastern and northern banks of the Rhine and Danube rivers. The region the Romans called Germania was an enormous stretch of heavily forested land, which was cold, wet, and uninviting from the Roman perspective. The “Germans” were a hugely diverse group of tribes practicing feudal law, the system of law in which offenses were met with clan-based violent retribution or blood payments. For hundreds of years there were complex relationships between various tribes and the Roman empire in which the Romans both fought with and, increasingly, hired German tribes to serve as mercenaries. Eventually, some of the Germanic tribes were allowed to settle along the Roman borders in return for payments of tribute to Rome.

The two major rivers, the Rhine and the Danube, were the key dividing lines to the north of Rome, with Roman legions manning permanent fortifications there. As far as the Romans were concerned, even if they were able to militarily they did not want to conquer German territory. The Romans tended to regard the Germans as being semi-human at best, incapable of understanding true civilization. Some Romans did admire their bravery and codes of honor – the same Tacitus who provides much of the information on the early emperors contrasted the supposed weakness and dissolution of his contemporary Romans with the rough virtue of the Germans. That being noted, most Romans believed that the Celts, conquered by Caesar centuries earlier, were able to learn and assimilate to Roman culture, but the Germans, supposedly, were not. Likewise, Germania was assumed to be too cold, too wet, and too infertile to support organized farming and settlement. Thus, the role of the limes was to hold the Germans back rather than to stage new wars of conquest. For about three hundred years, they did just that, until the borders started breaking down by the third century CE.

The Army and Assimilation

Rome had established control over its vast territory thanks to the strength of the citizen-soldiers of the Republic. As described in the last chapter, however, the republican military system declined after the Punic Wars as the number of free, economically independent Roman citizens capable of serving in the army diminished. By the first century, most Roman soldiers became career soldiers loyal to a specific general who promised tangible rewards rather than volunteers who served only in a given campaign and then returned home to their farms.

Perhaps the most important thing Augustus did besides establishing the principate itself was to reorganize the Roman legions. He created a standing professional army with regular pay and retirement benefits, permanently ending the reliance on the volunteer citizen – soldiers that had fought for Rome under the republic. Instead, during the empire, Legionaries served for twenty years and then were put on reserve for another five, although more than half died before reaching retirement age. The major benefits of service were a very large bonus paid on retirement (equivalent to 13 years of pay!) and land: military colonies spread across the empire ensured that a loyal soldier could expect to establish a prosperous family line if he lived that long.

Service in the army was grueling and intense. Roman soldiers were expected to be able to march over 20 miles in a standard day’s march carrying a heavy pack. They were subject to brutal discipline, up to and including summary execution if they were judged to have been derelict in their duties – one of the worst was falling asleep on guard duty, punishable by being beaten to death by one’s fellow soldiers. Roman soldiers were held to the highest standards of unit cohesion, and their combat drills meant they were constantly ready for battle.


Wall carvings of a Roman legion in battle, with the characteristic large rectangular shields. A regular legionnaire would typically fight in formation using a short sword after throwing javelins while closing with the enemy.

The army was important in integrating provincial subjects into Roman culture. A soldier recruited from the provinces had to learn Latin, at least well enough to take orders and respond to them. Auxiliaries served with men from all over the empire, not just their own home regions, and what each soldier had in common was service to Rome. Commanding officers were often from the Italian heartland, forming a direct link to the Roman center. Military families were a reality everywhere, with sons often becoming soldiers after their fathers. Thus, the experience of serving in the legions or the auxiliaries tended to promote a shared sense of Roman identity, even when soldiers were drawn from areas that had been conquered by Rome in the recent past.

In the provinces, there was a pattern that took place over a few generations. After being conquered by the Romans, there were often resistance movements and rebellions. Those were put down with overwhelming and brutal force, often worse than that of the initial invasion. Eventually, local elites were integrated in the governor’s office and ambitious people made sure their sons learned Latin. Locals started joining the army and, if lucky, returned eventually with money and land to show for it. Roman amenities like aqueducts and baths were built and roads linked the province with the rest of the empire. In short, assimilation happened. A few generations after Roman conquest, many (local elites especially) in a given province would identify with Roman civilization. Regular people in the countryside, meanwhile, would at least be obliged to tolerate Roman rule even if they did not embrace it.


For the first two centuries of its existence, Rome was overwhelmingly powerful, and its political institutions were strong enough to survive even prolonged periods of incompetent rule. Trouble was afoot on Rome’s borders, however, as barbarian groups became more populous and better-organized, and as the meritocratic system of the “Five Good Emperors” gave way to infighting, assassination, and civil war. At the same time, what began as a cult born in the Roman territory of Palestine was making significant inroads, especially in the eastern half of the Empire: Christianity.

Image Citations (Wikimedia Commons):

First Triumvirate – Andreas Wahra

Cleopatra VII – Jastrow

Augustus Caesar – Till Niermann

Colosseum – Andreas Ribbefjord

Empire 117 CE – Eleassar

Roman Legion – Ursus

This chapter has been derived with minor modifications from Chapter 8: The Roman Republic and Chapter 9: The Roman Empire in Western Civilization: A Concise History.


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