Augustine’s Two Cities: Divine and Earthly Realms

When the Visigoths sacked Rome in 410 AD, the most powerful empire of the ancient world suddenly looked fragile. Pagans blamed the Christians, arguing that abandoning the old Roman gods had invited disaster. It was in answering this charge that a North African bishop named Augustine of Hippo produced one of the most influential works in the history of political thought: De Civitate Dei, or The City of God. At its heart lies a powerful idea that students of political theory still grapple with today: human history is the story of two cities locked in a quiet but permanent struggle. One is the City of God (Civitas Dei), and the other is the Earthly City (Civitas Terrena). Understanding this distinction is key to understanding how medieval thinkers separated spiritual and worldly power, and why the relationship between religion and the state became such a defining question for the centuries that followed.

The historical backdrop: why Augustine wrote The City of God 🔗

To understand the two cities, you first have to understand the crisis that produced them. For nearly 800 years, Rome had not fallen to a foreign invader. So when Alaric and the Visigoths breached the city in 410 AD, the shock rippled across the entire empire. Many non-Christians saw a clear cause: Rome had recently adopted Christianity and turned away from its traditional gods, and now the gods had withdrawn their protection.

Augustine, who was the Bishop of Hippo Regius in Roman North Africa, set out to refute this accusation. He argued that Christianity was not the cause of Rome’s fall but that Rome’s collapse stemmed from its own internal moral decay. He wrote the work over roughly thirteen years, beginning around 413 AD and completing it near 426 AD. The result was a massive treatise of 22 books, and it became far more than a defence of his faith. It became a complete Christian philosophy of history.

This is where Augustine made a crucial intellectual break from earlier thinkers. Plato and Aristotle had assumed that a good and self-sufficient life could be achieved within a well-organised city-state. Augustine rejected this optimism. As the Encyclopaedia Britannica notes, he projected political life onto a cosmic stage, viewing earthly history as a drama shaped by original sin and moving toward a divinely ordained end.

The two cities: defined by love, not geography 🔗

The single most important thing to grasp is that Augustine’s “cities” are not physical places. They are not Rome and Jerusalem, and they are not even the Church versus the State. Instead, they are two spiritual communities or societies, distinguished entirely by what their members love.

Augustine summarised this idea in his most famous line on the subject: two loves built two cities. The love of self, taken to the point of contempt for God, builds the Earthly City. The love of God, taken to the point of contempt for self, builds the Heavenly City. As a scholarly analysis in the Review of Politics points out, the Latin term civitas here means a society rather than a state. Augustine himself treated the word as an equivalent of “society.”

The City of God (Civitas Dei) 🔗

The City of God is the community of all those who live according to God’s will and orient their lives toward eternal salvation. Its citizens are guided by faith, love, and a desire for spiritual fulfilment. The defining feature of this city is amor Dei, the love of God, which reorders every other desire.

A few points make this concept distinctive. First, membership has nothing to do with birth, nationality, or social class. A person belongs to the City of God purely through their relationship with God. Second, this city transcends earthly boundaries and time itself. Augustine held that it includes the faithful from across all history, and even angels and saints. It is, as scholars describe it, a mystical society of all the elect, past, present, and future. Importantly, Augustine did not simply equate this city with the institutional Church, even though the Church on earth represents and points toward it.

The Earthly City (Civitas Terrena) 🔗

In sharp contrast, the Earthly City is built on self-love, pride, and the pursuit of temporal power. Its citizens are driven by material desires, ambition, and a hunger for dominance. Augustine describes this city as marked by what flows from disordered self-love: domination, deceit, and conflict.

It is essential to note that the Earthly City is not the same thing as government or the state as such. Rather, it is the spiritual orientation of those who seek their ultimate good only in this world rather than in God. Because these citizens place themselves at the centre of everything, their values rest on shifting human opinion rather than on divine truth.

Intermingled in history: the two cities cannot be separated 🔗

One of Augustine’s most realistic and enduring insights is that the two cities are thoroughly mixed together in the present world. You cannot draw a map and point to where one ends and the other begins. Citizens of both cities are intermingled within every nation, every institution, and even every family.

This has a sobering political implication. According to Augustine, there is no possibility of building a perfectly Christian nation or a perfectly just secular state in this life. The two communities remain tangled together until the end of history, when the final judgement separates them. This is why his framework is described as an eschatological distinction, meaning it concerns the ultimate spiritual destiny of souls, rather than a simple political division between groups or institutions.

Augustine also stressed that, in this life, no one holds “dual citizenship.” Every person ultimately belongs to one city or the other, even though we cannot always tell who belongs where while history is still unfolding.

What this means for the state and political authority 🔗

Augustine’s theory carries a distinctive view of why the state exists and what it can realistically achieve. His political ideas flow directly from his theology, particularly his belief in human sinfulness after the Fall.

The state as a remedy for sin 🔗

For Augustine, government is not the natural expression of human flourishing that the Greek philosophers imagined. Instead, he viewed human government as a remedial measure introduced by God to restrain sin in a fallen world. The state exists to keep order, punish wrongdoing, and prevent society from collapsing into chaos. This gives political authority real value, but also strict limits. It is corrective and disciplinary rather than redemptive.

Peace as the goal of earthly politics 🔗

If the state cannot deliver salvation, what can it offer? Augustine’s answer is peace. He argued that the highest realistic achievement of earthly government is temporal peace, the basic order that allows people to live, work, and coexist. This earthly peace is imperfect and never the same as the eternal peace of the City of God. Yet it is genuinely valuable. Even the citizens of the Heavenly City, living as travellers in this world, benefit from and contribute to this earthly peace while they journey toward their true home.

Justice and the famous “gang of robbers” 🔗

Augustine also set a powerful moral standard for political power. He challenged the Roman statesman Cicero’s view that a true commonwealth must be founded on justice, and he made a striking claim: a kingdom without justice is nothing more than a great gang of robbers. This is not a rejection of government. It is a moral benchmark that every ruler and every state must be measured against. As one analysis of his political philosophy explains, Augustine judged political authority by how rulers pursued peace and order, which means his view of politics is not as purely negative as it is sometimes portrayed.

The relationship between spiritual and secular power 🔗

The doctrine of the two cities became the foundation for the long medieval debate about Church and State. Augustine prioritised spiritual authority over temporal authority. He held that true justice could not exist in a state that did not recognise the true God, and that genuine justice was rooted in spiritual rather than purely civil authority.

This created a model in which spiritual and worldly powers existed in tension but also in necessary cooperation. The Church served as a moral compass, and rulers were expected to govern within moral limits drawn from Christian teaching. After the decline of the Western Roman Empire, the Church increasingly became the keeper of learning and order, and Augustine’s framework helped justify the immense authority it would later wield. His ideas thus laid intellectual groundwork that shaped European thought for centuries, influencing later concepts of just war, the moral limits of rulers, and church-state relations.

Yet it would be a mistake to read Augustine as calling for a theocracy or for the Church to simply absorb the state. Because the two cities cannot be perfectly mapped onto Church and State, his thought actually resists the total merging of religion and political power. He defended the value of the secular world and earthly peace while insisting it was never the final goal.

Why Augustine still matters for political thought 🔗

Augustine’s two-cities framework remains relevant because it offers a clear-eyed, realistic theory of politics. By teaching that the state can secure only limited, temporal peace and never perfect justice, he set honest expectations for what governance can accomplish in an imperfect world. His ideas anticipated themes later developed by thinkers like Machiavelli, Luther, Calvin, and especially Hobbes, particularly the focus on human sinfulness and the need for political order.

For students of Western political thought, the bridge from Augustine to the medieval world is direct. His prioritising of spiritual authority and his insistence on the moral limits of rulers fed straight into the debates of the Middle Ages, including those later refined by thinkers such as St. Thomas Aquinas. The struggle between the divine and earthly realms that Augustine described was not just theology. It became a lasting template for thinking about power, legitimacy, and the proper place of religion in public life.

What do you think? Is Augustine right that no government can ever achieve perfect justice, and that the most we can realistically expect from the state is order and peace? And in a modern context, does his insistence that spiritual and political authority remain separate yet cooperative offer a useful guide for how religion and the state should relate today?

References

1. https://www.britannica.com/topic/The-City-of-God
2. https://en.wikipedia.org/wiki/The_City_of_God
3. https://www.britannica.com/topic/political-philosophy/St-Augustine
4. https://www.cambridge.org/core/journals/review-of-politics/article/abs/aspects-of-mediaeval-thought-on-church-and-state1/19B15E86CB1CF3562CA631C6A23D2A32
5. https://iep.utm.edu/augustine-political-and-social-philosophy/
6. https://washingtoninst.org/saint-augustine-and-the-political-imagination/
7. https://philosophy.institute/western-philosophy/augustines-political-philosophy-city-of-god-vs-earthly-city/
8. https://www.politicalscienceview.com/st-augustine-the-city-of-god/