The Arian Heresy and the Fall of Rome · 12:15am
Before talking about the Arian  heresy and the fall of Rome, I should probably explain why it’s important to fan-fiction.
The hardest problem in understanding what makes a story good or bad is figuring out what aspects of stories are important because of human nature, and what aspects are important to specific cultures. I approach this by looking for patterns in Western art across history. (I include literature, but it’s usually easier & quicker to see trends in visual art.) No properties of stories or of visual art have remained constant, but some recur continually, some usually appear together, and some never appear together.
The patterns in stories correspond to patterns in the priorities, beliefs, and hegemonic powers of the civilizations that made the stories . Usually, people wrote about why they made art the way they did, and this is a good entry point into decoding the patterns. We can also form and test theories about these correspondences by looking at times when religion, art, politics, and technology had strong effects on each other. A rough summary of my conclusion is that there is an art of order and an art of chaos, and major artistic clashes represent political differences over whether society needs more order, unity, and stasis, or more freedom, diversity, and change.
This post is about one such time: the Arian controversy in the Christian church. I don’t care about the controversy itself; I’m interested in its political consequences. So I’ll spend little time on the theological disputes of the 4th century, and more on the wars of the 5th and 6th centuries.
Here I’m looking not at art, but at religion. The controversy is relevant to art because it used religion the same way art is sometimes used: it sublimated a political dispute into a dispute that was reputedly more high-minded and noble, and which, by virtue of being thought of as more noble, was ironically more able to incite people to kill.
The episode is interesting because the participants openly admitted how religion motivated their violence. Art may help inspire people to violence, as we’ll see in my posts on WW1 and WW2, but those people seldom admit it afterwards. Here we have, if anything, the opposite problem--the suspicion that people may have overstated the degree to which their violence was inspired by religion.
A cheap way of summarizing it would be to say that the Arian challenge was a bid for freedom of thought, and the Catholic response proved that they would rather destroy civilization than allow that. That overstates the degree to which it was a conscious choice, though. I still blame the Church for being unreasonable, but I don’t think the church elders meant to start a war. But when secular leaders needed (or wanted) to take military action, the links between church and state made most conflicts line up along the same axis across Europe.
By itself, this post may not seem relevant to understanding art. But with a series of similar posts, we can begin connecting the dots of art, religion, and politics. I’ve already written one giving an overview across history, one on the Iliad, one on medieval art which I need to rewrite, one on modernism and World War 1, and one on the Nazis and art. I also want to write one about the role of real numbers in the Renaissance, one on the similarities and differences between Stalinist, fascist, modern, medieval Catholic, and primitive art, and one tracing the cultures at war in America’s current political disputes back to the different cultures that colonized the United States. 
I’ve studied this history for a few weeks, and some people have studied it their entire lives, so this may be bollocks. But all of these posts are going to be like that.
That said, let’s look at one of the most literally epic fails in history, the story of how the Roman civilization tore itself to shreds and brought on the Dark Age thanks to a 500-year theological dispute over whether Jesus and God the Father were consubstantial, or merely of like essence.
If you don’t know what that means, don’t worry. None of the people who fought over it did, either.
 “Arian” and “Aryan” have nothing to do with each other, except that “Aryan” is sometimes misspelled “Arian”, and Google will often “helpfully” change “Arian” to “Aryan” in searches.
 I’d like to learn and write about the relationships between Romanticism and Marxism, and between the Renaissance, the Enlightenment, and neo-classicism, though I’m afraid that may be prohibitively complex and time-consuming. In case I never post the one on the colonial US, I’d mostly be repeating stuff from Colin Woodard’s American Nations: A History of the Eleven Rival Regional Cultures of North America. It’s like a cross between The Nine Nations of North America and Albion’s Seed.
 I have already concluded that the variability in literatures is greater than the variability in human nature, and that this is because hegemonic powers allow people to tell only the kinds of stories which the powers think are advantageous to them.
(The rest of the footnotes are at the end of the post.)
Rome and the Barbarians
One traditional date for the fall of Rome, that used by Gibbon in The Decline and Fall of the Roman Empire (1776), is 476 A.D., when Flavius Odoacer deposed the Western Roman Emperor Romulus Augustulus.
A problem with this date is that “Emperor” Romulus had been appointed Emperor by a rebel general, and was not recognized by the Roman Senate. Odoacer was not a Roman citizen, but was an officer in the Roman army, and had the support of the Roman Senate, and ruled Italy for many years afterwards in the name of Rome, in theory subordinate to the Senate and/or Emperor (when one existed), following Roman laws and maintaining Roman institutions. Saying Rome fell in 476 because Odoacer took over is a little like saying America fell in 1960 because an Irish-Catholic American became President.
Many history books say that the Germanic tribes became more and more important militarily in late Rome because Romans didn’t want to serve in the military anymore. This is an absurd claim which is either false, or is covering up the reason why Romans wouldn’t serve in the military. There must have been some reason--the Roman Senate couldn’t pay them, the Church said they shouldn’t, something. Possibly there were too few Romans to run an empire, or the Romans came to trust the Germans more as they became more Roman.
Anyway, the Western Roman Empire kept on Roming for many years after 476, but its people were increasingly of Germanic descent. They weren’t barbarians who burned Roman cities and destroyed their art. Often they built better buildings and made better art.
I included this famous mosaic of the Eastern Roman Emperor Justinian in a post I haven’t posted yet, as an example of how much better Roman and Dark Age art was than Christian representational art of the High Middle Ages.
It turns out this mosaic is as much barbarian as it is Roman. There's a very similar mosaic in a nearby Arian basilica, made at the same time, likely by the same person, which is probably of the Ostrogoth emperor Theodoric. Both emperors are wearing not Roman crowns, but Lombard crowns, like this one:
The Justinian mosaic is in this basilica in Ravenna, Italy:
The Romans had moved their capital to Ravenna by the time the Visigoths sacked Rome in 410. Odoacer, the barbarian of unknown ethnicity who overthrew the emperor in 476, did so in Ravenna. The Ostrogoths captured it in 493. The basilica was built during the rule of the Ostrogoths, for a Roman Catholic bishop, and paid for by a Roman citizen. It was started in 527 A.D. and finished in 547, 7 years after the Byzantine (Eastern) Romans conquered the city.
Is it Roman, or Ostrogothic? The distinction is meaningless. Ravenna was culturally Roman the whole time. The Ostrogoths were Arian instead of Catholic, but they didn’t interfere with Catholic worship.
The Ostrogoths have a more-secure claim to be the sole builders of this originally-Arian basilica:
… and of Theodoric’s tomb:
The Visigoths weren’t shabby, either:
Oh, and the barbarians wrote books.
Books which have nearly all vanished today, because nobody copied them, because nobody could read them.  Because the people who made those buildings were replaced by the people who made… this one.
This was built by the Franks, the people who conquered Western Europe (except for Spain and Britain) from the other Germanic tribes in the name of defeating Arianism. It’s one of their most-impressive remaining pieces of architecture from that time.
The Arian Heresy
The early Catholic Church did not have a doctrine of the Trinity. They said that Jesus was definitely God, and God the Father was definitely God, but Jesus was definitely not God the Father. Also, Jesus was definitely God the Father’s son, but God the Father definitely did not exist before Jesus. The Arian heresy was the first of many attempts to make sense of that, all of which were declared heretical by today’s Catholic Church. It begins by saying Jesus was God’s begotten (biologically-ish fathered) son, since that was what the Bible appeared to say in several places.
The opponents of the Arians are sometimes called Athanasian, Trinitarian, Catholic, or Orthodox. Athanasian is too specific, the doctrine of the Trinity was not developed until the late 4th century, and Catholic and Orthodox effectively just mean “the winners.” I’ll use the term Nicene, because the first formulation in reaction against Arianism was the Nicene Creed. It says you have to believe the aforementioned contradictory things, and it’s a Mystery. The Nicenes say the Arians deny Jesus divinity, but that’s only if you use the Nicene definition of divinity.
Other ways of making sense of the Trinity include Monophysitism, which says that whatever Jesus is, he’s one kind of thing, can we agree on that? No; the official position is that Jesus has two natures at the same time, and it’s a Mystery. So a third position, Miaphysitism, tries to compromise between these positions…
… look, you really don’t want to know . The point is that people killed each other and countries had wars and civil wars over “Christology”, the study of the ontology of Jesus, a thing not one person in Europe understood, because at base it made no sense. The Arian Wars were one part of an even larger, longer battle between people who wanted to make sense of the Trinity, and a Church which had taken a stand and would not tolerate dissent nor legitimize this dangerous “making sense” idea. A partial account is in Philip Jenkins’ The Jesus Wars, which I haven’t read, but which sounds like the most fun book ever written on 5th-century Christian theology. 
Fighting over it isn’t as stupid as it sounds, because one real issue at stake was freedom of thought . The Arian Wars were the first conclusive test of the question, “Can Christians disagree with official Church doctrine on points that the Bible gives no remotely clear answer to, which have no effect on behavior or salvation, and that nobody understands anyway?” The Church’s determined answer  was, “No.” It was the principle of the thing. Arianism stood for free thought, and it had to be stamped out.
The Arian Wars
There are lots of theories over what caused “Rome’s” fall. If we restate this slightly and ask, “Why did Roman culture fall?” or “What caused the Dark Ages?”, the most-obvious answer is, “The Christology Wars.”
Googling “Arian Wars” turns up mostly pages about an online Star Wars roleplaying game. Here’s a quote from the first non-Star-Wars-related Google hit:
Gregory Nazianzen, who lived in Constantinople in the midst of the Arian wars, describes the division and hostility which this polemic spirit introduced between parents and children, husbands and wives, old and young, masters and slaves, priests and people. "It has gone so far that the whole market resounds with the discourses of heretics, every banquet is corrupted by this babbling even to nausea, every merrymaking is transformed into a mourning, and every funeral solemnity is almost alleviated by this brawling as a still greater evil; even the chambers of women, the nurseries of simplicity, are disturbed thereby, and the flowers of modesty are crushed by this precocious practice of dispute."
--Philip Schaff, 1910, The Christian Church from the 1st to the 20th Century, vol 3, chapter 9, sections 117-119 (no page numbers)
Some more chosen at random:
The church was no fooner delivered from external opprefion, but unhappy differences were fomented within itſelf, and its concord broken by internal diffentions. Amongſt thefe, few were more fatal than the controverfies between Arius, a preſbyter of the church of Alexandria, and Alexander, a biſhop of the fame city, concerning the divinity of Jefus Chrift. This difpute confuſed, and deſtroyed, the peace of the church in almoſt every corner.
--Joseph Strutt, 1779, The Chronicle of England, part III, p. 206
The father of Constantius, Constantine the Great, is undoubtedly responsible for having communicated to Christianity that secular character, which, during succeeding centuries, gave the Church so much sway over the temporal affairs of the world, as totally for a time to submerge the spiritual simplicity of its original… The peace of the empire was disturbed by the conflicts between Arius and Athanasius. Constantius was an Arian, and, though our ecclesiastical writers were too courtly to charge on the emperor all the evils which his Arian bias occasioned, yet they spare no abuse in describing the pestilential nature of the doctrines. "The holy union," continues Gildas, "between Christ the Head and the members of His Church, was interrupted by the Arian treason, which, fatal as a serpent, and vomiting its poison from beyond the sea, caused deadly dissension between brothers inhabiting the same house, and thus, as if a road were made across the sea, like wild beasts of all descriptions, and darting the poison of every heresy from their jaws,they inflicted dreadful wounds upon their country, which is ever desirous to hear something new, and remains constant long to nothing."
--J. A . Giles, 1847, History of the Ancient Britons, chpt. 19, p. 313-314
Gildas was plagiarizing Bede:
The churches of Britain remained at peace until the time of the Arian madness, which corrupted the whole world and even infected this island, sundered so far from the rest of its mankind, with the poison of its error. This quickly opened up the way for every foul heresy from across the Ocean to pour into an island which always delights in hearing something new and holds firmly to no sure belief.
--Bede, 731, quoted in Rowley p. 79
The Lombard invasion [in 553] brought into the church's territory a large number of refugees, and the Roman population recovered some of its old energy in the double hatred for barbarians and Arians.
--Williams, p. 531
Those quotes testify to a furor over Arianism in Rome and in three corners of the Roman Empire--Britain, Constantinople, and Alexandria. The city of Rome was ruled by Arian emperors from 335-378  and 476-538, and had four waves of imperial persecution--three persecuting Arians, and one persecuting Niceans. Church and State were not separate; the Emperor ruled the Church and used it as a political tool--which meant schisms over doctrine were a form of rebellion against the Emperor. (The Empire during most of this time period had two emperors at the same time, which made this especially awkward when they disagreed.)
How important was Arianism and the Arian Wars?
Let’s look at a map of Europe in 500 A.D.:
Here’s a map of Europe in 500 A.D. , with diagonal white stripes across the Nicene territories and horizontal black stripes across the Arian territories:
Here’s another map, with diagonal white stripes across the territories of cultures that survived into the 9th century, and horizontal black stripes across the cultures that were conquered, enslaved, dispersed, or exterminated:
Notice it’s the same map.
The Arian Wars extended beyond this map. All of North Africa, and most of Syria and Armenia, were Arian or something like it--they all rejected the 451 A.D. Definition of Chalcedon, which was supposed to lay Arianism to rest. The parts of those areas that broke free of Rome were all reconquered by Justinian in the 6th century, then soon after overrun by Persians and/or Muslims.
All these people would have fought wars anyway. But it was the injection of a two-sided religious controversy into the political area that wrecked western Europe. Everyone had to line up on one side or the other of the religious controversy, and that polarization turned what had been an assortment of independent conflicts into one Great War of extermination. Ordinary conflicts would have resulted in treaties and shifting alliances, but the Arian Wars weren’t stopped until one side--the Arians--was eliminated. Some by the Franks, and the rest hung out to dry when the Muslim invasions came.
We call the Dark Age (~400-800 A.D.) “dark” because we don’t know what happened, because we have few books. History books say that classical writings fell out of use in the desperate Dark Age, only to be recovered in the 8th-9th centuries from Ireland, Spain, and Rome (Wolff), and in 12th-13th centuries from Constantinople (see e.g. Recovery of Aristotle). In other words, mostly from those areas of Europe which had not been Arian, and remained loyal to the Latin Church, and so kept copying books in Latin or Greek.
Well, maybe. But the Arians built cathedrals and monasteries. They had monks. Maybe they wrote books, and the Catholics burned the books because they were Arian, or let them rot because they couldn’t read them. Maybe the multiple cultural genocides of the Arian Wars, which saw the settled, sophisticated, Romanized, Arian “barbarian” cultures wiped out by the less-sophisticated Franks by 800 A.D., turned the centuries before them into a Dark Age retrospectively, and lost everything that had been set down in Gothic and other writing.
A civilization might make no books, or a civilization might make a lot of books--but three books? That's like finding a civilization that made three automobiles.
"Guys, let's make an alphabet. Then we'll build a monastery and teach a bunch of monks how to read. Then we can train them in calligraphy, and develop parchment and inks and staining and bookbinding. Then we’ll learn how to inlay gold and silver leaf on the lettering. Then we can make a book."
"No way, man. If we go to all that work, we ought to make, like, three books."
It might seem unlikely that they could have written many books, and left only three--but how many Roman manuscripts are left? The Roman composition of which we have the most ancient copies, and which was by far its most-popular and most-quoted work--it’s said we could reconstruct the entire text from quotations of it--is the Aeneid, written in the first century B.C.. We have only four nearly-complete copies from the 4th and 5th centuries (Frieze & Dennison p. 24). All of our many other copies, are copies of copies of copies of copies of copies. Julius Caesar’s accounts of the Gallic Wars are perhaps the next most-famous and popular Roman writings, but there are no Roman copies of it--the oldest manuscripts are three partial copies made in the 9th century.
And how many of the writings of Arius do we have--the writings that began the Great Arian War, that were followed by all Western Europe at one time or another? Nothing but a few letters--because the Catholics burned everything else. The emperors Constantine and Honorius prescribed death for anyone who did not hand over any writings of Arius to be burnt (Penny Cyclopedia, “Office, Holy”, p. 406; many other sources as well). Emperor Theodosius also burned his writings. (I’m not sure he condemned people who hid his books to death, though that was standard Roman practice regarding books you didn’t want people to read.)
What would a good Catholic conqueror have done, confronted with a Gothic codex he could not read? Trust a Goth that it didn’t say anything Arian, and maybe risk death? Or burn it?
Emperor Constantine burning Arian books. Manuscript CLXV, Biblioteca Capitolare, Vercelli, Italy, 825.
The Importance of Pretending to be Earnest
Did any of these rulers, or their subjects, really care about doctrine?
As far as I can tell, some of them cared quite a lot about doctrine. The large fraction of emperors in the 4th and 5th centuries who adopted a position contrary to most of their subjects in this and other controversies, and so caused themselves great difficulties, suggests sincerity.
They certainly cared about what people said they cared about. Religious beliefs about things no one understood weren’t beliefs in any meaningful sense; they were political claims about who had religious authority. Why did the Byzantines ally in the Great War with the Franks, a still culturally-pagan people, against the Romanized Goths and Vandals? The only answer I’ve found in history books is, Because Clovis was Catholic. A Catholic whose subjects still sometimes made pagan sacrifices, but, hey, at least he wasn’t Arian. That was, as shown above, a Big Deal. The Byzantines couldn’t and wouldn’t ally themselves with Arians.
Let’s look at a little bit of the timeline--mostly the war parts--to see how much Arianism mattered.
325 A.D., Council of Nicea
This was the council emperor Constantine called to resolve the dispute between Arius and Athanasius. It produced the Nicene Creed and anathematized Arianism.
439 A.D., Vandal occupation of Carthage
I watched a BBC video on the fall of Carthage--the second fall, when the Vandals took it in 439--which said that the Vandals just walked into the city on a day with a really important set of Hippodrome races, and the Romans thought it was more important to finish the races than to fight them off.
This seems highly unlikely, but Wikipedia backs it up. And Wikipedia can’t be wrong!
I still thought that sounded fishy, so I looked to see if there were a religious aspect. There was. Carthage was the stronghold of Donatism, a Catholic heresy which began with “we don’t want to take communion from priests who cooperated with the persecution of Christians,” then progressed to “we won’t take communion from priests ordained by those priests,” and so on. It was persecuted severely by the Romans for over a hundred years (thanks largely to Augustine, patron saint of kicking the shit out of other Christians for obscure theological differences ) before the "fall" of Carthage. The Vandals were Arians, so they freed Carthage from the Roman church, which is what Carthage had been struggling for since about 313 AD. That’s probably why the Carthaginians let the Vandals walk in.
(Then the Vandals persecuted them for being Nicene.)
451 A.D., Council of Chalcedon, near Constantinople
This council met to try to resolve the Arian controversy. The result was a permanent estrangement between European Christianity, which accepted the council’s creed, and the Church in the Middle East and Africa, which did not. This critically weakened Byzantium and helped the Muslims conquer those regions which had split from the Roman church.
sometime by the 490s A.D., Franks conquer Western Roman Empire
Once Clovis had conquered all the Franks and Western Romans left to conquer, he wanted to keep on conquering his neighbors. To do that, he needed an alliance with somebody who wasn’t his neighbor, and the best candidate was the Eastern Romans (the Byzantines). This would be kind of awkward, as he’d just conquered what remained of independent Western Rome. How could he make peace with them?
variously reported as 493, 496, 497, or 498 A.D., Frankish king Clovis I converts to Catholicism
The pagan king Clovis suddenly converted to Catholicism, and all his people (according to Bishop Gregory of Tours) welcomed this change. So did the Byzantines. Now they had one potential Catholic ally in Europe.
507 A.D., defeat of the Visigoths by Clovis I of the Franks
Clovis said that he made war against the Visigoths to rescue his Germanic brethren from the Arian heresy. I have read a quote by him to this effect, but I can’t find it now, darn it. In any case, the Franks allied themselves permanently with the Roman Catholic church.
The Frankish monarchy became the ardent supporter of the papacy during the early Middle Ages. Frankish kings crossed the Alps many times to save the Roman bishop from his [Arian] enemies in Italy.
--Cairns, Christianity Through the Centuries, p. 123
It is evident, from the language of Gregory of Tours, that this conflict between the Franks and the Visigoths was regarded by the orthodox party of his own and preceding ages as a religious war, on which, humanly speaking, the prevalence of the Catholic or the Arian creed in western Europe depended.
--Walter Copland Perry, The Franks, from their first appearance in history to the death of King Pepin, p. 85.
This quote and many more from http://www.patmospapers.com/daniel/in508.htm
Among all the Germanic nations, the Franks alone had become Catholic from their first rise in the provinces of the Roman Empire. This acknowledgment of the Roman see had secured important advantages to the Frankish nation. In the Catholic subjects of their Arian enemies, the western Goths and Burgundians, the Franks found natural allies. We read so much of the miracles by which Clovis was favoured — how St. Martin showed him the ford over the Vienne by means of a hind, how St. Hilary preceded his armies
in a column of fire — that we shall not greatly err if we conclude these legends to shadow forth the material succours afforded by the [Nicene] natives to those who shared their creed, and for whom, according to Gregory of Tours, they desired victory "with eager inclination."
--Williams, p. 525
The Great Arian War began in earnest at this point, as an alliance between the Franks, the Catholic Church, and the Byzantines, against all the rest of Western Europe and North Africa, and sometimes even the Persians, who synchronized their invasion of the Byzantine Empire with the Ostrogoths.
533-554 A.D., Justinian’s reconquista
This was the other major action in the Great Arian War. Justinian’s armies reconquered much of the Western Roman Empire from Arians in just 20 years, but the effort left his empire so weakened that it was torn apart from all sides almost immediately after he died in 565, leading directly to the Dark Age.
Justinian seems to have been genuinely interested in theology, but is usually said to have waged war motivated by the desire to recreate the Roman Empire. This was, however, in the wake of hostility between the Byzantines and the Ostrogoths created by the Arian controversy. All the monarchs in this conflict probably just wanted to fight and expand their land, but the interweaving of church and state made it impractical for anyone to ally with someone on the other side of the Arian controversy.
With the ascension of Justin I in 518, a more harmonious relationship seemed to be restored. Eutharic, Theoderic's son-in-law and designated successor, was appointed consul for the year 519, while in 522, to celebrate the healing of the Acacian schism, Justin allowed both consuls to be appointed by Theoderic [the Arian Goth]. Soon, however, renewed tension would result from Justin's anti-Arian legislation, and tensions grew between the Goths and the [Roman] Senate, whose members, as Chalcedonians [non-Arians], now shifted their support to the [Byzantine] Emperor.
774 A.D., Charlemagne conquers the Lombards
Charlemagne conquered the Lombards, the last free Arians. Charlemagne was a fanatical Catholic, although his grasp of theology is questionable, as it was his practice to offer conquered people a choice between Catholicism, or death.
The Carolingian Emperor Charlemagne led a series of campaigns against the Saxons, a Germanic tribe, in order to pressure them to convert to Christianity. This included the destruction of the Saxons’ holy site at Irminsul and the massacre of 4500 Saxon captives at Verden in 782. Three years later the Saxon leadership and peoples surrendered and accepted baptism.
Charlemagne called his empire the Holy Roman Empire, a name which was ridiculed in the 20th century. It is accurate, however, in that the Franks’ two main allies in the 300-year battle to create this empire were the Roman Empire and the Catholic Church.
In summary, it’s a reasonable hypothesis that Western Europe’s “Dark Age” of 400-800 A.D. appears dark mainly because Western Europe was ruled entirely by people who were wiped out, and their writings destroyed or simply not copied, in a 300-year-long war to wipe out Arianism and re-establish the Roman (Catholic) Empire.
Even if that’s not true, it seems that the Arian controversy increased the cultural destructiveness of the wars. Perhaps just as many battles would have been fought without the Arian controversy, but it does not seem likely that the large alliance needed to wipe out all six Arian kingdoms could have been maintained for 300 years if a two-sided religious dispute had not made alternative alliances impossible. What probably would have happened is that the different kingdoms would have fought each other sporadically, power-balancing politics would have favored the weak, and cultural transfer would have had more time to preserve knowledge of the period.
You might wonder whether or not people intended for their argument about religion to have these effects. If we’re asking about the “purpose” of religion, though, then this might not matter. If you think that religion is a product of rationality and proceeds rationally, then that would be a reasonable question. If you think religion evolved to serve a social function, then whether or not something was the intent of the human agents that caused it is irrelevant to whether that is its function.
 Lombards and Vandal architecture is, unfortunately, un-googlable, the Vandals because “vandal architecture” returns lists of vandalized architecture, and the Lombards because the region of Italy where they lived is called Lombardy and “Lombard architecture” is used for much-later Carolingian architecture built in Lombardy.
 If you really do want to know, start by word-searching your Bible for the phrase “only begotten”. You’ll find several verses calling Jesus God’s only begotten son, including the famous John 3:16. Here’s where that word came from:
Christians are still fighting over this translation. Orthodox Nicenes say that monogenes refers to something that is “the chosen one,” something in a special relationship. (The Wikipedia page on monogenes was written by such anti-Arian propagandists.) Evil heretics point out that ancient Greeks only used the word to refer to sons or daughters or metaphorical fatherings, so “genesis”, a kind of creation, is still part of the meaning in any case, so the word still imples that Jesus was a creation and the focus on “the special one” (the “mono” part) is a smokescreen. St. Jerome, who chose the word “unigenitus”, did so in the middle of a fierce Arian war in Rome itself in 383 A.D., and may have chosen that word to be anti-Arian, though I see it as pro-Arian. On the other hand, it’s the obvious literal translation of monogenes. It has been dropped from many modern translations--according to some Christians, for being pro-Arian, and according to others, for being anti-Arian.
The Arians have been dead for over a thousand years, so this continued vigilance against them might surprise you if you aren’t familiar with the Catholic Church. A better discussion of the issues re. the translations is here, and a reasonable defense of the orthodox view is here, and you can find many others, though honestly I don’t advise reading any of them. The discussion itself is ultimately nonsense--a twisting of words trying to find some way of resolving Bible passages that are either contradictory, or so metaphorical that they shouldn’t be interpreted in such corporeal ways. What’s important is its consequences.
 It may also have been a political power-play. Some contemporary historians think that the “Arian heresy” was the majority view of the original Church, and that the now-“orthodox” view was a doctrine that a radical group used to take over. Citation needed, but I’ve got to finish this and you can look it up yourself if you care. Personally, I think that the books of Matthew, Mark, and Luke were Arian, while the book of John and the writings of Paul were Nicene. I have a very high opinion of the authority of Mark; I think it’s the only book in the New Testament which might have information about the historical Jesus. I have a low opinion of the book of John and the writings of Paul; I consider them to be full of fanciful, invented theology, apparently written in ignorance of the events and the sayings of Jesus in the Gospels, and they contain most of the objectionable parts of the New Testament. Together with Revelations, they are the parts of the New Testament which should not have been included. So perhaps I would be Arian if I were Christian.
 It’s only fair to note that the people who turned the Arian controversy hot and dangerous were a series of Roman emperors--Constantine (mostly Nicene), Valentius (Arian), and Theodosius (Nicene).
 There are still some northern Italians who call themselves Lombards today, but AFAIK no Goths, Vandals, Burgundians, or Huns since the 7th century. What happened to them?
The Romans dispersed the Vandals. The Ostrogoths joined up with the Lombards. The Merovingian and Carolingian (Frankish) kings constantly raided their neighboring kingdoms for slaves (Wolff 1968), so it’s a good guess that the Franks enslaved the other tribes they conquered, which was all of Western Europe except Britain, Spain, and the heel of Italy. That may have been how serfdom originated. Procopius of Caesarea, a historian who travelled with the Roman general Belisarius, wrote that the Franks
began to sacrifice the women and children of the Goths whom they had found at hand and to throw their bodies into the river as the first fruits of war. For these barbarians , though they had become Christians, preserve the greater part of their ancient religion; for they still make human sacrifices and other sacrifices of an unholy nature, and it is in connection with these that they make their prophecies.
--(De Bello Gothico, 6.25.1-18)
However, he also wrote that Justinian was a demon whose head sometimes vanished, so take that with a grain of salt.
 This is weird, since neither the Romans nor the Ostrogoths were Lombards. Possibly Odoacer was. If anybody can clear this up for me, please do.
 In between the time when the Western Roman Empire tore itself apart over Christology, and the time when the Western and Eastern Church ruptured over Christology, the Eastern Roman Empire nearly destroyed itself over whether drawing pictures of saints was evil.
 Also patron saint of kicking your common-law wife and son out into the street in order to be ordained as a bishop.
 I’m counting Constantine I’s last 2 years as pro-Arian, because he recalled Arius from exile and exiled Athanaius.
 Based on one from timemaps.com.
The Venerable Bede 731. Ecclesiastical History. (Latin; Historia ecclesiastica gentis Anglorum)
Earle E. Cairns 1954. Christianity Through the Centuries: A History of the Christian Church.
Henry Frieze & Walter Dennison, editors, 1902. Virgil's Aeneid, Books 1-12. New York City: American Book Company.
J.A. Giles 1847. History of the Ancient Britons, from the Earliest Period to the Invasion of the Saxons. London: George Bell, 186 Fleet Street.
The Society for the Diffusion of Useful Knowledge 1840. Penny Cyclopaedia, vol. 16: Murillo--Organ. London: Charles Knight & Co., 22 Ludgate St.
Walter Copland Perry 1857. The Franks, from their first appearance in history to the death of King Pepin. London: Longman, Brown, Green, Longmans, and Roberts.
Sharon M. Rowley 2011. The Old English Version of Bede's Historia Ecclesiastica. D. S. Brewer.
Philip Schaff 1910. The Christian Church from the 1st to the 20th Century.
Joseph Strutt 1779. The Chronicle of England; or, A compleat history, civil, military and ecclesiastical, of the ancient Britons and Saxons, from the landing of Julius Caesar in Britain, to the Norman conquest. London: Printed by Joseph Cooper for T. Evans in Pater Noster Row and Robert Faulder No. 42 New Bond Street.
Henry Smith Williams 1907. The Historians’ History of the World, vol 8: Parthians, Sassanids, and Arabs; the crusades and the Papacy. London & NYC: Hooper & Jackson.
Philippe Wolff 1968. The Cultural Awakening. New York: Pantheon. (A book on several key figures of the early middle ages.)