*First in a series on the emergence of Christendom from Roman civilization and then Western Civilization*
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“Western Civilization” is everywhere in current conversation — invoked, debated, defended, and attacked. But what does the term actually mean? Where did it come from? And what does Christianity have to do with it?
This post introduces the vocabulary and historical backdrop for a series that will explore specific periods and topics in depth. Think of it as a reference point — a shared set of definitions to carry through the posts that follow.
The Important Words
This is a brief summary of the important words and concepts for the discussion which follows:
Roman Civilization
Rome began as a city-state on the banks of the Tiber, founded, according to tradition, in 753 BC. Over several centuries it expanded through conquest, diplomacy, and assimilation to become the dominant civilization of the Mediterranean world. What made Rome distinctive was not merely its military power but its capacity to absorb: conquered peoples often became Romans, adopted Roman law, spoke Latin, and participated in Roman civic and religious life.
Roman civilization refers to this entire cultural, legal, and political inheritance — architecture, philosophy, law, language, and religious practice — that Rome spread across Europe, North Africa, and the Near East.
The Republic and the Empire
Roman history divides, roughly, into two major political phases.
The Roman Republic (traditionally 509–27 BC) was governed by elected magistrates — consuls, senators, tribunes — operating under a system of laws and checks designed to prevent any one man from holding absolute power. It was not a democracy in the modern sense, but it was a constitutional order with genuine civic participation, at least among free male citizens.
The Roman Empire (27 BC–476 AD in the West) began when the general Octavian — renamed *Augustus* — consolidated power after a century of civil wars. The republican institutions remained, but real authority now rested with the emperor. The Empire brought two centuries of relative peace and prosperity (the *Pax Romana*, roughly 27 BC–180 AD) across a territory stretching from Britain to Mesopotamia.
The Empire and Its Provinces
The Roman Empire was not a uniform state. Rome and Italy held a privileged position, but the vast majority of the Empire’s population lived in the provinces — administrative regions stretching from Roman Britain (*Britannia*) to Roman Egypt (*Aegyptus*). Provincial peoples had varying degrees of Roman citizenship and varying levels of cultural integration. A merchant in Roman Antioch, a legionary on Hadrian’s Wall, and a senator in Rome were all “Roman” in some sense — but their daily lives, languages, and local customs differed enormously.
This diversity matters for everything that follows: Christianity did not emerge in Rome. It emerged in a province.
Christianity
Christianity emerged in the Roman province of Judea in the first century AD, rooted in Judaism and centered on the life, death, resurrection, and ascension of Jesus of Nazareth. His followers spread rapidly across the Empire’s provincial network — through synagogues, trade routes, and urban centers. By the end of the first century, Christian communities existed in Rome, Corinth, Ephesus, Alexandria, and Antioch.
Christianity was initially a minority religion — often persecuted, sometimes tolerated — within a civilization that was officially polytheist and that expected religious participation in the imperial cult. This changed decisively in 313 AD when Emperor Constantine issued the Edict of Milan, granting Christianity legal toleration, and again in 380 AD when Emperor Theodosius made it the official religion of the Empire.
Christendom
Christendom is not simply Christianity. It is the *civilization* that emerged when Christian faith became the dominant organizing principle of social, political, and cultural life — first within the late Roman Empire, then across the post-Roman kingdoms of medieval Europe.
Christendom implied Christian institutions (the Church), Christian rulers, Christian law, Christian calendars and festivals, and a shared sense — however contested in practice — of belonging to one spiritual community. It was a civilization, not merely a religion.
And it was never monolithic. Throughout the entire period from Rome through the Middle Ages, minority populations persisted: Jewish communities maintained their own law and practice, often under legal protection, often under persecution. Philosophical traditions — Platonism, Stoicism, Epicureanism — continued to shape educated thought, sometimes in tension with Christianity, often absorbed into it. Paganism survived in rural areas for centuries after Christianity’s official triumph. Skeptics and non-believers existed in every era, even if they rarely announced themselves.
Western Civilization
Western Civilization, as the term is commonly used, refers to the cultural tradition that descended from this fusion: Greco-Roman learning and political thought, filtered through and transformed by Christian faith and institutions, and eventually reformed, challenged, and extended through the Renaissance, Reformation, Enlightenment, and beyond.
It is, at its core, the heir of Christendom — which was itself the heir of Rome.
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What This Series Will Explore
The posts that follow will move through specific periods of this long story:
– 30–180 AD — the early Empire, the spread of Christianity through the provinces, Roman religious pluralism
– Later periods will follow, each examining a slice of the transformation from Roman world to Christian civilization
At each stage, we will be asking the same questions: What did people believe? How were they organized? What was changing, and who was being left out?
The terminology introduced here — Republic, Empire, Province, Christianity, Christendom, Western Civilization — will be the working vocabulary throughout. Come back to this post if the terms need refreshing.
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*NEXT: Christians as Aliens in the Roman World: Next: 30–180 AD *
Mark D. Nispel, with Claude (Anthropic)