What Caused the Roman Empire to Collapse

The Roman Empire seemed unbeatable at  its peak - one of the largest empires the world has ever seen. It fended off  all of its military foes. It built a complex administrative state that ruled  regions from Egypt, to Spain, to England, and as far east as modern-day Iraq.

At its  height, it seemed like it would rule forever. And today, it’s a distant memory. Why did the Roman Empire ultimately fall? 

Did it meet an enemy too powerful to fend off? Was it undone by internal conflict? Or did  it simply stretch itself too thin?

The answer isn’t any one of those - and the empire’s  downfall happened over hundreds of years. To find the truth of the Roman Empire’s fall,  we have to go back to how it became an empire in the first place - because initially, it was a  Republic with far less territory. The Republic had taken over from the previously flawed monarchy,  but the people seemed to be calling out for a more unified government.

One man was more than  willing to answer that call - Julius Caesar, the man appointed perpetual dictator  of Rome in the mid-first century BCE. He started consolidating power, becoming  a popular and effective ruler who won many military campaigns - and many of his rivals  realized he had no intention of giving up his newfound power. The elites of Rome  assassinated him, setting off one of the biggest political crises in Roman history. 

Civil wars kicked off as many people sought to claim power - and in the end the wars saw  Octavian, the adopted son of Caesar, take power. He continued his father’s legacy, conquering  nearby territories including Egypt - ending that country’s Hellenistic era. Soon, he  was more powerful than his father ever was, and the Roman senate responded accordingly. 

They granted him the title of Augustus, allowed him to rule in perpetuity, and soon no one  would dare challenge his power. The plotters who feared Caesar’s role as dictator had accidentally  crafted the rise of Rome’s first Emperor. And he wouldn’t be the last.

From then, Rome would not only become  another monarchy ruled by a series of hereditary leaders both good and bad, but  it would develop a hunger for conquest that would envelop a large part of Europe and  parts of Asia and Africa. While Italy would continue to serve as the center of the  empire, the other territories would be organized into provinces - each administered  by a local governor with drastically different approaches to leadership. The empire would  soon be so large that it would be impossible for one leader to maintain full control over every  territory, which meant the provinces would still maintain some level of autonomy - as long as they  paid their taxes and didn’t cause any problems that would arouse the ire of the Emperor. 

And the system seemed to be working - the empire was stable enough that the next two  centuries became largely known as “Pax Romana”. But under the surface, trouble was brewing. During the first century CE, religious conflict  started brewing under the surface.

The Roman Empire largely worshipped the traditional pantheon  - led by Jupiter and heavily tied to the Greek pantheon led by Zeus. This polytheistic faith  was characterized by ornate temples dedicated to the individual Gods and a wild lore that  made the Gods seem rather petty and human. Jupiter’s dalliances with human women, and gods  taking revenge for the most petty grievances, were both common staples of the faith in those  days - and then came Christianity.

Spinning out of the teachings of the Jewish Rabbi  known as Jesus and his eventual crucifixion by the Roman authorities, this new Abrahamic  faith was based of the often-persecuted faith of Judaism - and largely received the same  treatment in the early days. While some of the more dramatic stories like early Christians  being fed to lions have no historical backing, the Roman Empire saw new faiths  as a threat to the establishment. But religions aren’t easy to kill.

The conflict stayed under the radar and  Christianity was mostly a small faith during those early years, and a wise emperor  would have likely focused on maintaining the empire’s stability rather than persecuting  heathens. But when you have a monarchy, you’re often relying on the whims of birth  order and genetics - and in the year 177, Rome’s luck ran out. The new Emperor, Commodus,  would soon become infamous for this exact reason.

The youngest Emperor ever at the age of  fifteen, his rule was dictated by his emotions which led to recklessness. A teenager  making bad decisions when given too much power? Perish the thought!

As her was inheriting  the Empire built by many of his predecessors, it was hard for him to screw up the larger things  - but back in Rome, he wasted no time throwing things into chaos. He was known for his fickle and  dictatorial leadership style, as well as his love of the gladiator matches in the Colosseum. He  would even participate in duels himself - which largely meant anyone who faced off against him  would probably be expected to die quietly.

He built a cult of personality around himself,  and his reign was so chaotic that he would eventually be immortalized by Joaquin Phoenix as  a villain in the Oscar-winning movie Gladiator. And his reign ended as it began - with chaos. Commodus was assassinated by a wrestler in  the Roman baths after fifteen years in charge, and things would only get more chaotic  from there.

The Roman Senate declared him a public enemy and tore down  his statues, and he was succeeded by a new Emperor - in what would become  known as the Year of the Five Emperors. It was 193 CE, and civil war ensued. The next  emperor would be assassinated only three months after taking office, his successor would  essentially pay off the guards to let him become Emperor, and he would be ousted and  executed only weeks later.

The chaos would only die down when two emperors, Septimus Severus  and Clodius Albinus, ruled simultaneously despite both considering the other to be a threat.  Rome’s political climate was in complete chaos. And soon, people outside would start noticing.

Many of the provinces of Rome had been  semi-autonomous for a long time and had developed their own cultures. So as the  Roman state spiraled into chaos, they started to wonder - why not just make it official? As  the Romans struggled through a series of weak, crazy, and inconsequential Emperors -  often in quick succession - territories started to break away at an increasing rate. 

First came the self-declared Gallic Empire, which took most of the territory of  modern-day France and England with it. Then came the Palmyrene Empire, which was led  by Queen Zenobia and took over much of Egypt and the eastern coast of the Mediterranean -  including the many key sites in the Holy Land. It was the biggest crisis in Rome’s history  - but it would bring many changes with it.

A series of three Emperors in the third  century would bring this crisis to the end - but the Roman Empire that emerged from  it would not be the same. First was Aurelian, who only reigned for five years  but had a huge impact. At the time, the diminished Roman military was under attack  by Barbarian tribes and internal strife, and it seemed like the Empire’s days might be  nearing an end.

But Aurelian had risen through the ranks of the military and knew its workings  well, and under his reign he fended off the attacking tribes and conquered both the Palmyrene  Empire and the Gallic Empire. He surrounded Rome with mighty walls, abandoned provinces that  were too much trouble to keep, and improved Rome’s economy. Under his short tenure, Rome  started to look more like it did at its peak.

His successors would build on his work. Diocletian would reign for twenty years and was  also a military veteran, but most of the military work had been completed already. He would focus  his efforts on improving the empire’s stability, which included creating a system of regional  courts that would give the empire more control over its far-flung provinces.

While the empire  had reclaimed the territory lost to the breakaway provinces, Diocletian started expanding once  again - and by the end of his twenty years, he became the first Roman emperor to abdicate  his position voluntarily, retiring to his palace. But his successor might have  had an even bigger impact. The thirty-one year run of Constantine the  Great would be among the most successful in the empire’s history.

He introduced a new  currency, expanded the empire’s territory, and reorganized the army to be more effective.  But his most significant change was his conversion to Christianity - reportedly spurred on by him  seeing a cross in the sky. As the Roman Emperor converted, so did many of the citizens of Rome,  igniting Christianity’s rise to becoming a world power religion.

At the end of his reign,  the empire’s territory was near its peak, expanding as far east as Byzantium. After his  death, Constantine left the empire to his sons, starting a new dynasty which would rule over  Rome. The Roman Empire looked as healthy as ever, and many people assumed that this was  the beginning of a new golden age.

So how could things go so very wrong? The year was 337 CE when Constantine passed  away, and while Constantine’s reign had been full of successes, there was trouble lurking  under the surface. His embrace of Christianity had given the Church massive power in Rome, and  although many supported him in this decision, there were some who didn’t wish for the empire to  fall under the grasps of Christianity.

Enemies of the state were executed, and their estates  were given to those he favored. The military was paid well, but soon the soldiers seemed  to be engaging in blatant corruption. But the empire was still the greatest power in the world,  and it was hard to imagine anyone challenging it.

But empire’s aren’t immune from internal strife. In the aftermath of the death of Constantine,  the throne of the empire was once again open for contest, and this era led to many conflicts  over who would take control. His sons initially ruled jointly, but chaos would follow and  Rome would be plunged into civil war.

Many territories were taken over by local leaders,  with territories going back and forth at the whims of military victories. Despite this,  the core of the empire was unchallenged, and by 379 a new emperor named Theodosius had  risen. A proven general, he would become one of Rome’s greatest military leaders and  would put an end to this era of strife.

But far greater threats were  brewing beyond the borders of Rome. As far-reaching as Rome’s borders were at the  time, it was hard to believe that a nomadic people from a continent away would throw the whole thing  into chaos. But the Huns were no ordinary nomads.

Fierce warriors, they had been making inroads into  Asia and Eastern Europe - and where they went, people fled. Their mass takeover of territory led  the local Gothic tribes to flee towards the Roman Empire. Suddenly, the Romans had a huge influx  of barbarian warriors fleeing across their border - and Rome’s lack of management in their border  states came back to haunt them.

A well-organized government may have been able to resettle these  new residents and incorporate them into the Roman state - even using their warrior smarts  to reinvigorate the military. Unfortunately, the corrupt local officials instead chose to  exploit them, assuming they weren’t a threat. They would be proven very wrong.

Now the Romans had a large number of outside  warriors within their borders. These guests had seen Roman hospitality was lacking, and  they quickly took up arms. They were joined by other tribesmen heading over the  border, and what started as a refugee crisis quickly turned into a guerilla war.

While  Rome had a superior military force, it was also spread out and concentrated in the cities, and the  forces that were sent to confront the Goths found the invaders fought much harder than expected. The  elites felt very little of this crisis - they were kept safe in their walled cities - but across  the massive expanses of the Roman countryside, the Goths quickly gained territory and claimed the  land of former Roman subjects across the Balkans. And Theodosius may have neglected  this problem a bit too much.

The Emperor may have restored Rome’s  military in some ways, but the coffers were still looking kind of bare after decades  of patronage under his predecessors. He raised taxes to confront the barbarians - and was met  with rebellions from the people he ruled over. He also cracked down on other faiths, doubling  down on Constantine’s embrace of Christianity, and even persecuted believers of other  variants of Christianity.

Soon he was facing new rebellions in the west seeking to  end his rule, with rebel leader Magnus Maximus declaring himself emperor in 383 and taking over  the territory of Gaul. This led to significant losses in territory and troops until Maximus  made a failed attempt at defeating Rome itself and was ultimately defeated in 388. Rome once  again became the greatest power on the planet.

But soon this would all change. By 395 CE, Theodosius I would die, leaving behind  him a weakened army and no clear successor. His two sons would each claim the empire, but neither  was a capable leader - leaving their ministers to essentially take charge of the situation.

Rather  than go to another brutal civil war only a decade after the last, the two halves of the empire  essentially went their own separate ways - one emperor, Arcadius, took the eastern Roman Empire,  which would become known as the Byzantine Empire in the future, while the other son, Honorius,  would take the western part including Rome itself. It was the biggest loss of territory for Rome yet  - and this time, there would be no going back. The Byzantine Empire would endure, lasting  for another thousand years with a power base in the city of Constantinople - but  it would never reach the world-defining power of the Roman Empire.

As for Rome, it  still ruled much of Europe - but its days were drawing short. Without the massive  territory now owned by the Byzantines, administering the empire was much more  manageable - but it also meant the massive barbarian invasions were harder to control. The  leader of the Huns, Attila, was one of the most feared military leaders of all time - and now  he placed his full attention on taking Rome.

It would be a death of a thousand  cuts for the Roman Empire. Over the next eighty years, the Roman Empire dealt  with brutal attacks from the Huns on their fringes and the Gothic population throughout the empire.  The Roman military was a shadow of what it used to be, and it frequently found itself in retreat. 

The territory of the empire shrunk piece by piece, and Rome started to look less like a powerful  empire and more like a city in decline. Some leaders would manage to restore the military’s  strength, but none would get it back to the level where it could reclaim significant amounts of  territory. The empire would limp along until 476, where one ambitious king decided it  was time to strike the final blow.

His name was Odoacer - and the  mostly-forgotten figure may have been one of the most important people in history. The last Emperor of Rome, Romulus  Augustulus, had a mighty name but was only a sixteen year old boy when Odoacer  invaded. The barbarian king, surprisingly, dealt kindly with the young king as he sacked  Rome - accepting his surrender and allowing the boy to remain alive.

He sent him away to live  with relatives, even granting him a pension, before declaring himself the ruler of Italy.  Probably the most dramatic firing from a first job a teenager had ever experienced! But now, the  Roman Empire was over - or was it?

That depends on how you define it, because Odoacer now ruled what  was left of it - but he was considered a foreign occupier. The Roman Senate didn’t consider him a  legitimate Roman ruler and instead transferred the seal of Rome to the eastern empire. And so the  greatest empire in history passed into legend.

Or did it? The Roman empire as a government was no more,  but its greatest institution still remained - the Roman Catholic Church. It was still in its  infancy, less than five hundred years old, but its faith had spread very quickly and would  soon grow its roots in most of Europe.

As the Church spread, so did its power - and for  the best part of the next thousand years, it would be the de facto government in much  of Europe. Even kings would answer to it, and few would challenge the Pope’s  power until Henry VIII would start his own religion when the Church  wouldn’t let him get divorced. So, while the Roman Empire did not control Europe  anymore, the Church’s legacy far outlive it.

But why did the empire actually fall? There is no one reason why the Roman Empire  crumbled, but many factors played a role - few bigger than the collapse of its military. Rome’s  army was once the most powerful in the world, and it attracted the best with good pay.

But as  the empire’s coffers declined, it soon struggled to recruit new troops effectively. This led  to Emperors filing out the ranks with foreign mercenaries, who neither had the skills nor the  loyalty of previous armies. Many even came from the invading armies they were fighting, and the  effectiveness of their fighting forces suffered.

They tried to make up for the personnel  problem - but that just made things worse. Many emperors consistently overspent on  the military, but that didn’t make it any easier to manage. The huge territory they  had to govern made it near impossible to communicate effectively, and with no e-mail  or teams groups to share important memos, it was often a matter of weeks or months before  key changes in policy were communicated.

As the empire got larger and larger, this became a  bigger problem - and soon the empire was more focused on protecting its key cities than  effectively managing its whole territory. But inside Rome itself, things  weren’t doing much better. One of the biggest problems with Rome in its last  days was the lack of strong leadership - right up to the top.

Being Roman Emperor was not a  great job. Given that it was an appointed position that came with near-unlimited power,  a lot of people wanted it - and that meant that getting the job came with massive risks. At one  point between the second and third centuries, over twenty men held the title in less than  75 years - and the most common way to be fired from this job was with a knife between  your ribs.

Turns out Julius Caesar was a trendsetter. When an Emperor did manage  to hold onto power for years, there was a good chance they would essentially turn the  empire into their own personal patronage mill, appointing their allies to powerful positions. And  the Emperor’s bodyguards, the Praetorian Guard, would often take matters into their own hands and  assassinate emperors when they became more trouble than they were worth.

With a government like this,  is it any wonder that the empire began crumbling? All of these factors came together,  spelling the end of the Roman Empire. For centuries, the Roman Empire had  been unchallenged on a military level.

Their expeditions would face little to no  opposition, and their army could largely sweep into a territory and take it over as  they pleased. Conquering new territories often meant having to build new infrastructure that  would increase quality of life in the region in some way as well as enforcing the rule  of the Roman Empire on its newly acquired citizens. So the army wound up being more of  an enforcement arm of the Roman government, and it was no longer prepared to deal with  major military conflict.

So when outsiders such as the Goths came calling after being  pushed out of their territory by the Huns, the Roman military wasn’t forimdable  enough to maintain its borders. And it all came down to one fatal mistake. If the military was well-prepared for this  invasion, the odds are they could have defeated the Goth armies and defended their territory.

They  were better trained and had superior weaponry than the Goths. But once the Goths had managed to  enter the fringes of the empire, it was going to be much harder to displace them without a major  military operation. The Romans ultimately chose the worst option of all - they didn’t aggressively  repel the Goth invaders and defend their borders, but they also didn’t welcome them into the empire  and take advantage of this new manpower like they could have.

Instead, they exploited them and hired  them while never letting them develop any loyalty to the empire. This led to constant civil wars  and small military skirmishes, growing tension, and a slow but sure loss of territory. And  it all could have been avoided if the Empire coordinate a better response to the Goths seeking  refuge within the borders of the Roman Empire.

Want to learn more about the end  of empires? Watch “Real Reason Ancient Egyptians Went Extinct”,  or check out this video instead.