Civilization #32: Rome’s Rise, Fall, and Legacy¶

📺 Watch Lecture on YouTube: Civilization #32: Rome's Rise, Fall, and Legacy

Core Thesis: The Imperial War Machine and the Mirror of Modern America¶

In this lecture, Prof. Jiang Xueqin explores the dramatic arc of ancient Rome—its unlikely rise, internal transformation, ultimate collapse, and enduring institutional legacy. Prof. Jiang opens with a direct civilizational parallel: Rome is the historical mirror of the United States of America.

The United States was intentionally modeled on the Roman Republic. Both societies became the unchallenged superpowers of their respective eras, possessing military machines so dominant that external conquest was virtually impossible. America today is protected by two vast oceans, endowed with boundless natural resources, and powered by an intensely aggressive population and the most sophisticated military machine on Earth. Yet Prof. Jiang argues that both Rome and America share a tragic internal dynamic: they are war machines. When an aggressively organized society runs out of foreign enemies, it cannot simply become peaceful; its accumulated aggression inevitably turns inward, sparking destructive domestic civil conflicts.

To decode this dynamic, Prof. Jiang investigates three foundational questions:

Why did Rome rise? How did an isolated, backward settlement on the Tiber defeat its wealthier, culturally dominant Mediterranean rivals (Persia, Carthage, Athens, and Sparta)?
Why did Rome fall? Countering Edward Gibbon’s conventional thesis of moral decay and barbarian invasion in 476 CE, Prof. Jiang argues that Rome effectively died in 212 CE with the Edict of Caracalla, which destroyed the value of Roman citizenship, eroded cultural coherence, and enabled autocratic bureaucracy.
What is Rome’s legacy today? The Western world still inhabits Rome’s legal, institutional, and political architecture. By examining Rome's crisis of citizenship and uncontrolled aggression, modern societies—especially the United States and Canada—can understand their own impending structural crises.

1. Rome and the United States: Parallel Superpowers¶

Prof. Jiang begins by analyzing the structural symmetry between the Roman Empire and the modern American superpower:

flowchart TD
    subgraph SuperpowerSymmetry["Rome and the United States: Structural Mirrors"]
        S1["The Classical Hegemon: Ancient Rome<br/>• Master of the Mediterranean for centuries<br/>• Dominant military engineering & legal institutions"]
        S2["The Modern Hegemon: The United States<br/>• Master of the globe; 800+ overseas military bases<br/>• Protected by two oceans; virtually invincible from external invasion"]
    end

    subgraph WarMachineDynamic["The Pathology of the War Machine"]
        W1["Societies Organized for Aggression & Martial Expansion"]
        W2["External Stage: Aggression Directed Outward Against Foes"]
        W3["Hegemonic Ceiling: Rome Defeats All Enemies / Post-1991 US Has No Peer Competitor"]
        W4["Internal Stage: Aggression Inevitably Turns INWARD"]
        W5["Outcome: Intra-Elite Purges, Social Breakdown & Domestic Civil War"]
    end

    SuperpowerSymmetry ==> WarMachineDynamic

The Inherent Aggression of the Hegemon¶

The Invincible Core: If the entire world united to invade the United States today, America would win. Protected by two oceans, blessed with geographic depth and agricultural abundance, and possessing a heavily armed, aggressive population, the nation is militarily unassailable from without.
Turning Aggression Inward: Rome was constantly at war. When it expanded, it fought external adversaries. When it ran out of foreign adversaries, its predatory military apparatus turned inward, producing a century of bloody civil wars.
The American Predicament: Since the fall of the Soviet Union in 1991, the United States has had no peer competitor. Despite efforts by Washington to paint China as an existential military threat, America has no true military rival. Deprived of a foreign foe capable of absorbing its aggressive momentum, America's martial energy is turning inward, setting the stage for severe domestic political violence and civil conflict within the next decade.

2. Why Did Rome Rise? The 500 BCE Mediterranean Board¶

Rome's traditional founding dates to 753 BCE as a monarchy, transitioning in 509 BCE into a Republic. In 500 BCE, Rome was an impoverished, isolated, and culturally backward mud settlement along the Tiber River under the shadow of the Etruscans. Nobody observing the Mediterranean in 500 BCE would have predicted that Rome would become the master of the Western world.

flowchart TD
    subgraph Mediterranean500BCE["The Geopolitical Board in 500 BCE"]
        P1["1. The Persian Empire (Favorite)<br/>• Controls Egypt, Anatolia & Mesopotamia<br/>• Boundless wealth, massive population, imperial scale"]
        P2["2. Greek City-States (Contenders)<br/>• Athens: Unrivaled maritime commerce & naval power<br/>• Sparta: Dominant land military hegemon"]
        P3["3. Carthage (Strategic Powerhouse)<br/>• North African hub controlling western sea trade"]
        P4["4. The Etruscans (Local Master)<br/>• Culturally dominant rulers over early Italy"]
        P5["5. Macedonia (Borderland Underdog)<br/>• Impoverished northern frontier client of Persia"]
        P6["6. ROME (Off the List)<br/>• Backward, poor settlement along the Tiber"]
    end

    subgraph TheHistoricIrony["The Oceanic Reversal"]
        R1["Macedonia Conquers Persia (Philip II & Alexander)"]
        R2["Rome Overwhelms the Entire Mediterranean Basin"]
    end

    Mediterranean500BCE ==> TheHistoricIrony

The Six Mediterranean Competitors¶

The Persian Empire: The reigning superpower controlling the three richest agricultural basins of the ancient world: the Nile Delta (Egypt), Anatolia (modern Turkey), and Mesopotamia (modern Iraq). It possessed infinite wealth and manpower.
Athens: The naval hegemon of Greece, dominating Aegean trade with a powerful fleet and cultural dynamism.
Sparta: The premier land army in Greece, totally organized around martial discipline.
Carthage: Located in modern Tunisia, commanding African trade routes and western Mediterranean sea lanes.
The Etruscans: Advanced culture north of the Tiber that dominated early Rome (early Roman kings were Etruscan).
Macedonia & Rome: Two impoverished borderlands at the bottom of the list.

Yet in a striking demonstration of the Oceanic Currents of History, the two backward borderlands—first Macedonia under Philip II and Alexander the Great, and then the Roman Republic—overwhelmed all the wealthy, established civilizational centers.

3. Cultural Systems: The Roman Response to Athens¶

Why did Rome succeed where others failed? Prof. Jiang argues that Rome's triumph was fundamentally cultural. Rome developed its core cultural values in deliberate opposition to the Greeks (specifically democratic Athens), having observed firsthand how Athenian democracy led to hubris, division, and imperial catastrophe in the Peloponnesian War (431–404 BCE).

flowchart TD
    subgraph AthenianModel["The Greek / Athenian Model"]
        G1["Freedom (Eleutheria):<br/>Egalitarian right of every male citizen to speak & debate"]
        G2["Eudaimonia (Flourishing):<br/>Individual pursuit of honor, personal glory & competition"]
        G3["Arete (Excellence):<br/>Individual brilliance celebrated above character or loyalty"]
        G4["Political Form: DEMOCRACY<br/>One-man-one-vote; unstable factional voting"]
    end

    subgraph RomanCounterModel["The Roman Republican Counter-Model"]
        R1["Liberty (Libertas):<br/>Respect for laws, ancestors (Mos Maiorum) & NO KING"]
        R2["Res Publica (Public Good):<br/>Sacrifice of personal self for the survival of the state"]
        R3["Pietas (Duty / Loyalty):<br/>Obedience to fathers, gods, laws, and the Republic"]
        R4["Political Form: THE REPUBLIC<br/>Rule of institutions, the Senate & ancestral tradition"]
    end

    AthenianModel <==>|Developed in Conscious Opposition| RomanCounterModel

Cultural Domain	Greek / Athenian Value	Roman Counter-Value	Prof. Jiang's Analytical Distinction
Concept of Freedom	Eleutheria (Freedom): Right of every citizen to speak his mind; egalitarian debate.	Libertas (Liberty): Respect for law, ancestral tradition (mos maiorum), and an absolute refusal to submit to a King.	Greek freedom encourages individual chaos; Roman liberty grounds personal autonomy in legal order and institutional duty.
Ultimate Pursuit	Eudaimonia (Personal Flourishing): Striving to outshine peers and win immortal fame.	Res Publica (The Public Good): Subordinating individual ambition to the collective welfare of Rome.	Achilles was treasonously selfish in the Iliad (asking gods to curse Greeks for his ego); Romans viewed such behavior as treason.
Moral Standard	Arete (Individual Excellence): Admiring brilliance, martial talent, and rhetorical skill regardless of morality.	Pietas (Piety & Loyalty): Unquestioning obedience to ancestors, traditions, family patriarchs, and the state.	Greeks admired the brilliant rogue; Romans demanded reliable, selfless obedience to the collective commonwealth.
Governance Structure	Democracy: Direct assembly voting; majorities decide policy on the spot.	The Republic: Rule of the Senate, ancestral precedent, and permanent legal institutions.	Athenians voted on impulse to execute generals or invade Sicily; Rome maintained strategic consistency across centuries.

4. Citizenship, Identity, and Military Replenishment¶

Prof. Jiang demonstrates that Rome’s geopolitical advantage over Greece lay in how each society structured citizenship and identity.

flowchart TD
    subgraph DemocracyExclusion["Democracy: Exclusive Citizenship"]
        D1["Decision-Making: Direct Popular Debate & Voting"]
        D2["Newcomers Dilute Existing Citizens' Voting Power"]
        D3["Strict Barriers to Foreigners Entering Citizenship"]
        D4["War Losses Cannot Be Replenished -> Strategic Attrition & Collapse"]
    end

    subgraph RepublicInclusion["The Republic: Institutional Citizenship"]
        R1["Decision-Making: Fixed Institutional Tradition & Precedent"]
        R2["Newcomers Absorb Traditional Customs Without Altering Policy"]
        R3["Citizenship Granted to Foreigners Willing to Fight & Obey"]
        R4["Limitless Manpower Replenishment -> Unbeatable Attrition Resilience"]
    end

    DemocracyExclusion <==> RepublicInclusion

The Lunch Analogy: Democracy vs. Republic¶

To make the structural difference vivid, Prof. Jiang provides a classroom thought experiment:

The Democratic Model: Four students debate where to eat lunch (McDonald's, dumplings, pizza). They argue and vote; majority wins. If five new students join the group who all love noodles, the original members are outvoted and forced to eat noodles every day. Because newcomers threaten the voting balance, a direct democracy instinctively closes its borders and denies citizenship to outsiders.
The Republican Model: The group eats lunch based on tradition: every Thursday they eat dumplings, regardless of personal preference. If 100 newcomers join, it does not matter—everyone still eats dumplings. Because institutions and traditions are fixed, a republic can absorb massive numbers of foreigners without altering its governing structure.
The Military Consequence: Athens fought brilliant campaigns, but in every battle it lost citizens it could never replace. Rome suffered catastrophic defeats, but because it granted citizenship to conquered Italian allies willing to fight under Roman law, Rome possessed an inexhaustible reservoir of manpower.

The Crucible of Hannibal and the Punic Wars¶

The Contrast of Cannae (216 BCE): When the Persians threatened Athens in 480 BCE, the Athenians abandoned the physical city, took to their ships, and declared that Athens was simply a "community of people" that could sail anywhere. When Hannibal wiped out Rome's legions at Cannae (killing up to 70,000 Romans in an afternoon), Rome had no army left. Yet Rome refused to negotiate, surrender, or abandon the city. Rome's identity was rooted in its sacred soil, laws, and institutions. Every man, woman, and child took up arms, and the Republic fought to the death.
The Pyrrhic War (280–272 BCE): King Pyrrhus of Epirus invaded Italy with elite Greek phalanxes and war elephants, winning every tactical engagement. Yet after slaughtering legions of Romans, Pyrrhus realized that Rome simply recruited fresh armies from its Italian allies. Pyrrhus famously lamented: "One more such victory and I am undone."
The First Punic War (264–241 BCE): Rome had no navy and did not know how to sail. It built fleets from scratch, lost hundreds of warships and over 100,000 men to storms and Carthaginian admirals, yet built fleet after fleet until Carthage was exhausted.

5. The Fatal Contradiction: Republic versus Empire¶

By 100 BCE, Rome had conquered the Mediterranean. Yet total victory triggered a profound psychological and institutional crisis: a Republic cannot govern an Empire.

flowchart TD
    subgraph TheContradiction["The Crisis of Imperial Success"]
        C1["The Republic Requires: Dispersed institutional power, Senate, agrarian citizen-soldiers"]
        C2["The Empire Requires: Centralized bureaucracy, permanent standing army, executive command"]
        C1 <==>|Cognitive Dissonance| C2
    end

    subgraph TheHypocrisy["The Denial of Empire"]
        H1["Augustus Claims: 'I have restored the Republic!'"]
        H2["Titles Himself: Princeps ('First Citizen'), NOT Rex ('King') or Imperator"]
        H3["US Parallel: Global hegemon with 800 bases denying it is an Empire<br/>('We are a democracy defending freedom!')"]
    end

    TheContradiction --> TheHypocrisy

The Cognitive Dissonance of Empire¶

Bureaucracy vs. Tradition: An empire requires centralized bureaucratic administration, standardized taxation, and a single supreme commander. A republic relies on rotating aristocratic magistrates, ancestral custom, and checks on individual power.
Refusal to Acknowledge Reality: Romans despised kings (rex). When Augustus Caesar founded the imperial autocracy in 27 BCE, he never proclaimed himself emperor. He called himself Princeps ("First Citizen"—the origin of the English word prince), claiming he was merely a humble servant who had "restored the Republic."
The American Parallel: The modern United States operates an empire with over 800 military bases worldwide, yet Americans violently reject the label: "We are a constitutional republic, a democracy, not an empire!" American political discourse routinely projects imperial decisions onto small client states—claiming that Israel dictates US Middle East policy, or that European allies manipulate US actions in Ukraine—because the American psyche cannot bear the cognitive dissonance of acknowledging its own imperial hegemony.

6. The Death of Roman Character: From Mucius Scaevola to Sejanus¶

To illustrate how imperial autocracy eroded the Roman soul, Prof. Jiang contrasts two foundational stories from Roman history:

flowchart TD
    subgraph EarlyRepublic["Early Republic (509 BCE): Mucius Scaevola"]
        M1["Etruscan King Porsenna Besieges Rome"]
        M2["Young Nobleman Mucius Infiltrates Enemy Camp to Kill the King"]
        M3["Thrusts Right Hand into Sacrificial Fire Without Flinching"]
        M4["Proclaims: 'We Romans have sworn to kill all Kings!'"]
        M5["Ethos: Defiance of Autocracy; Moral Agency; Fearless Patriotism"]
    end

    subgraph HighEmpire["High Empire (31 CE): Marcus Terentius"]
        T1["Emperor Tiberius Purges Praetorian Prefect Sejanus & All Allies"]
        T2["Nobleman Marcus Terentius Put on Trial Before the Senate"]
        T3["Defends Sycophancy: 'The gods made the Emperor sovereign arbiter...<br/>To us has been left the glory of obedience!'"]
        T4["Senate Applauds His Speech; Executes His Accusers"]
        T5["Ethos: Total Submission to Autocratic Power; Death of Republican Liberty"]
    end

    EarlyRepublic ==>|Degeneration of Character Under Empire| HighEmpire

The Speech of Marcus Terentius (Tacitus, Annals)¶

In 31 CE, Emperor Tiberius purged his powerful Praetorian prefect, Sejanus, executing Sejanus and his family. The Senate launched treason trials against everyone associated with Sejanus.

While other defendants cowardly claimed ignorance, nobleman Marcus Terentius delivered a stunningly frank defense recorded by historian Tacitus:

"It is not ours to ask whom you, Caesar, exalt above his fellows, or why. The gods have made you the sovereign arbiter of all things; to us has been left the glory of obedience... To search out the hidden thoughts of the prince and the designs he shapes in secret is unlawful and dangerous."
The Senate was so impressed by this articulation of total autocratic submission that they acquitted Terentius and executed his accusers!
Prof. Jiang contrasts this with Mucius Scaevola in 509 BCE, who thrust his hand into fire to prove that Romans will never obey a king. In 500 years, the Roman character had migrated from fierce anti-monarchical liberty to the groveling celebration of absolute obedience.

7. The True Fall of Rome: The Edict of Caracalla (212 CE)¶

Mainstream historiography, following Edward Gibbon's Decline and Fall of the Roman Empire, dates the collapse of Rome to 476 CE, when the Germanic chieftain Odoacer deposed the teenage emperor Romulus Augustulus.

Prof. Jiang offers a revolutionary counter-thesis: The Roman Empire did not fall in 476 CE; it fell in 212 CE with the Edict of Caracalla.

flowchart TD
    subgraph TraditionalFall["Conventional View: Edward Gibbon (476 CE)"]
        G1["Imperial Decay & Luxury"] --> G2["Barbarian Invasions (Germanic Tribes pushed by Huns)"]
        G2 --> G3["476 CE: Romulus Augustulus Deposed by Odoacer"]
    end

    subgraph JiangThesis["Prof. Jiang's Thesis: The Cultural Death (212 CE & 330 CE)"]
        C1["212 CE: The Edict of Caracalla (Constitutio Antoniniana)<br/>• Grants Roman citizenship to EVERY free inhabitant of the Empire"]
        C2["Devaluation of Citizenship:<br/>• When everyone is a citizen, citizenship is worthless<br/>• Dissolves distinct Roman cultural identity"]
        C3["Autocratic Bureaucracy Replaces the Republic:<br/>• Emperors untethered from tradition, Senate & ancestral laws"]
        C4["330 CE: Constantine Moves Capital to Byzantium (Constantinople):<br/>• The soul of Rome abandoned; Western Roman culture dies"]
    end

    TraditionalFall -.->|Superficial Military Event| JiangThesis

Why Caracalla Destroyed Rome¶

Cheapening Citizenship: For centuries, Roman citizenship was the most prized status in the ancient world. It could not be bought; it had to be earned through blood, military sacrifice, and assimilation into Roman traditions (mos maiorum).
The Edict of 212 CE: In 212 CE, Emperor Caracalla issued the Constitutio Antoniniana, declaring every free inhabitant in the empire a full Roman citizen (primarily to expand the tax base).
The Destruction of Cultural Cohesion: By making citizenship universal and effortless, Caracalla destroyed its value. If anyone anywhere in Egypt, Syria, or Gaul was instantly a Roman citizen, being a Roman no longer meant anything.
The Final Abandonment (330 CE): Once Roman identity dissolved, Emperor Constantine in 330 CE did the unthinkable: he moved the imperial capital from Rome to Byzantium (Constantinople). Moving the capital away from Rome severed the empire from its historic roots, giving birth to the Greek bureaucratic state known as the Byzantine Empire. The true cultural soul of Rome had perished.

8. Civilizational Lessons for the Modern World¶

Prof. Jiang concludes by extracting three urgent structural lessons from the Roman experience for contemporary Western societies:

flowchart TD
    subgraph ThreeLessons["Three Historical Lessons from the Fall of Rome"]
        L1["1. Citizenship & Cultural Coherence<br/>• Uncontrolled immigration without cultural assimilation dissolves national identity<br/>• Cheap citizenship destroys citizen allegiance (Canada, UK, Western Europe)"]
        L2["2. The Inevitability of Inward Aggression<br/>• Hegemons built on violence turn violence inward when foreign enemies vanish<br/>• American gun worship & gladiatorial football -> Impending civil conflict"]
        L3["3. The Impermanence of Hegemony<br/>• All superpowers fall; institutional arrogance blinds elites to systemic decay"]
    end

1. Citizenship and the Crisis of Immigration¶

A nation cannot survive without a coherent, fiercely guarded cultural identity.
When citizenship is devalued into a transactional commodity, national allegiance vanishes. Prof. Jiang cites his native Canada: over the last decade, Canada’s population grew from 30 million to 40 million through mass immigration. Over 40% of Canadians are now foreign-born or first-generation, with little attachment to Canadian history or heritage. When foreign leaders propose annexing Canada as a 51st American state, millions of recent arrivals would gladly accept for economic convenience, lacking any cultural identity to defend.

2. The Internalization of Martial Aggression¶

Rome was a war machine that turned on itself. The United States exhibits the same pathology: an armed populace with over 400 million firearms (more guns than people) and a culture that celebrates gladiatorial violence (American football, where athletes suffer brain damage for spectator entertainment).
Without a peer adversary abroad, American aggression is turning inward. Prof. Jiang forecasts that the US will likely launch a major foreign war (most probably against Iran within 5 years) and suffer severe internal political violence, assassinations, and civil conflict within the next decade.

3. The Rebirth of Rome in European Successor States¶

Even though Rome died, its institutional blueprint survived. The Germanic warlords who carved up the Western Empire adopted Roman law, the Latin language, and the Catholic Church, laying the groundwork for the modern nation-states of France, Germany, and Britain.

Master Synthesis: The 8 Structural Milestones of Lecture #32¶

Milestone	Analytical Domain	Conceptual Mechanism	Spoken Seminar Formulation
I	The Hegemonic Mirror	Rome as the Blueprint for America	Both are geographically shielded, militarily unassailable war machines whose outward aggression inevitably turns inward when external enemies vanish.
II	The Geopolitical Anomaly	500 BCE Mediterranean Underdog	Rome was an impoverished frontier settlement on the Tiber; its victory over Persia, Athens, Sparta, and Carthage proves that energized borderlands defeat decadent cores.
III	Cultural Counter-System	Roman Republican Values vs. Athens	Rome rejected Athenian democracy (eleutheria, eudaimonia, arete) in favor of the Republic (libertas, res publica, pietas), prioritizing collective duty over individual glory.
IV	Citizenship Architecture	Inclusion Through Traditional Assimilation	Direct democracy excludes outsiders to protect voting shares; the Roman Republic integrated vast foreign manpower because newcomers assimilated to fixed ancestral laws.
V	The Crucible of Hannibal	Absolute Refusal to Surrender	At Cannae (216 BCE), Rome lost its army but refused to negotiate; Athens abandoned its city on ships, while Rome tied its very soul to its soil and laws.
VI	Cognitive Dissonance of Empire	The Fiction of the Princeps	Romans refused to admit they were an empire; Augustus called himself "First Citizen" (princeps), exactly like modern Americans denying their global empire.
VII	The Fall in 212 CE	Edict of Caracalla Destroys Identity	Rome did not fall in 476 CE; it died when universal citizenship made Roman identity worthless, paving the way for Constantine to abandon Rome for Byzantium in 330 CE.
VIII	Contemporary Warning	Devalued Citizenship & Internal Violence	Nations that dilute citizenship through mass immigration cease to exist; societies addicted to martial aggression inevitably tear themselves apart.

Key Civilizational Takeaways¶

The Predatory War Machine: Superpowers organized for martial aggression cannot achieve peaceful stability. When foreign enemies are eliminated, systemic aggression turns inward, producing domestic civil war.
The Republic Outlasts Democracy: Direct democracy is fragile, factional, and exclusionary. The Roman Republic triumphed because its rule of law, institutional continuity, and flexible citizenship allowed it to absorb endless military casualties.
Cannae and the Sacred Soil: A civilization survives existential threats only when its citizens refuse to abandon their sacred institutions. Rome’s finest hour was its absolute refusal to negotiate with Hannibal after total defeat.
The Illusion of the First Citizen: Imperial rulers consistently disguise autocracy under republican rhetoric. Augustus claimed to restore the Republic while monopolizing military command, a dynamic mirrored by modern American hegemony.
The Suicide of Universal Citizenship: Citizenship is meaningful only when it requires sacrifice, loyalty, and cultural assimilation. When citizenship is distributed universally without obligation (212 CE), national identity dies.

Seminar Discussion Questions¶

The Parallel War Machines: In what ways does Prof. Jiang’s characterization of Rome and America as "war machines" explain why both societies experienced intense domestic polarization after eliminating their primary geopolitical rivals?
Freedom versus Liberty: Contrast the Greek concept of eleutheria (individual freedom) with the Roman concept of libertas (institutional liberty). Why did the American Founders choose Roman libertas over Athenian democracy?
The Lesson of Cannae: Why did the Roman Senate refuse to negotiate with Hannibal after losing 70,000 soldiers in a single day? How does this response contrast with Athens' evacuation onto ships during the Persian invasion?
Tacitus and Marcus Terentius: Analyze the speech of Marcus Terentius in Tacitus's Annals. How does his defense of sycophancy toward Sejanus demonstrate the psychological decay of Roman republican character under the Principate?
The Edict of Caracalla: Evaluate Prof. Jiang’s argument that Rome fell in 212 CE rather than 476 CE. What are the modern political implications of granting universal citizenship without requiring cultural assimilation or civil duty?
Gladiators and American Football: How does Prof. Jiang link American gun culture and professional football to Roman gladiatorial spectacle? What does a society's choice of mass entertainment reveal about its internal stability?

Academic References¶

Tacitus, The Annals of Imperial Rome (Trans. Michael Grant; Penguin Classics, 1996; Book VI, Marcus Terentius's speech).
Livy, The Early History of Rome (Trans. Aubrey de Sélincourt; Penguin Classics, 2002; Books I–II).
Gibbon, Edward, The History of the Decline and Fall of the Roman Empire (Ed. David Womersley; Penguin Classics, 1995).
Polybius, The Rise of the Roman Empire (Trans. Ian Scott-Kilvert; Penguin Classics, 1979; Book VI on the Roman Constitution).
Piketty, Thomas, Capital in the Twenty-First Century (Trans. Arthur Goldhammer; Belknap Press, 2014).
Turchin, Peter, Ages of Discord: A Structural-Demographic Analysis of American History (Beresta Books, 2016).
Badian, Ernst, Foreign Clientelae (264–70 B.C.) (Oxford University Press, 1958).
Mommsen, Theodor, A History of Rome (Trans. William P. Dickson; Charles Scribner's Sons, 1895).