#498 – Anthony Kaldellis: Roman Empire, Byzantine Empire, Rise & Fall of Empires
Anthony Kaldellis discusses the 2,200-year history of the Roman Empire, arguing it should be called the 'Roman Empire' rather than the 'Byzantine Empire,' and explaining how its governmental structures—particularly taxation systems, the perpetual referendum of popular acclamation, and a monarchical republic framework—created remarkable institutional stability and resilience that allowed it to survive repeated existential crises.
Summary
The conversation explores the continuity and longevity of the Roman Empire from 753 BC to 1453 AD, challenging historiographical conventions that divide it into classical, late Roman, and Byzantine periods. Kaldellis argues these divisions are artificial; the empire's citizens consistently identified as Romans, maintained Roman law and citizenship, and operated within a continuous political tradition. The empire evolved through the Kingdom period, Republic (509-27 BC), and Imperial Monarchy (27 BC-1453 AD), with the Center shifting eastward under Constantine who founded Constantinople in 330 AD.
A central theme is how the taxation system served as the backbone of imperial unity. Diocletian's reforms (284-305 AD) created universal taxation, census mechanisms, and bureaucratic structures that bound all communities into an integrated institutional matrix. Citizens could not hide from taxation systems that monitored arable land across three annual collections. This universal framework, combined with accessible legal petitions and the emperor's rhetorical commitment to serving subjects, created what Kaldellis calls a 'perpetual referendum'—emperors had to maintain popular support or face violent overthrow (46% of East Roman emperors were deposed through violence).
The empire's political system functioned as a 'monarchical republic,' where absolute-seeming imperial power was actually constrained by the need to maintain consensus. The Hippodrome served as a public gathering space where crowds could voice approval or opposition through acclamations, giving emperors real-time feedback on policies. There was no hereditary right to the throne, making every emperor vulnerable and incentivizing responsive governance. Contrary to modern assumptions, the empire rarely used armies for internal social control, suggesting genuine public consensus rather than coercion.
Constantine's decisions—founding Constantinople and converting to Christianity—were world-historically consequential. His conversion to Christianity was likely sincere rather than purely political, though Christianity's adoption took centuries to complete (reaching ~50% of the population by the 5th century, solidly Christian by the 6th century). The empire deliberately incorporated the church as a governmental institution through land grants, charity distribution, and legal authority, effectively capturing Christianity into the Roman system rather than being conquered by it.
The empire experienced distinct cycles of crisis and recovery driven by exogenous shocks rather than internal decay. The 7th-century Arab conquests stripped away Egypt, Syria, Palestine, and parts of Asia Minor—the empire's richest provinces. Yet through military innovation (Greek fire), strategic naval power, and administrative reorganization, the empire stabilized and eventually recovered. The 10th-century Macedonian Renaissance saw renewed prosperity and territorial expansion. The 11th-century triple crisis (Seljuk Turks, Pechenegs, Normans) caused severe territorial loss, but the empire survived through consolidated Asia Minor and renewed focus on core regions.
Justinian's reign (527-565) exemplified both imperial greatness and problematic decision-making. He launched wars of reconquest, codified Roman law (the Corpus Juris), rebuilt Constantinople and Hagia Sophia after the Nika riots (which killed 30,000), yet overstretched resources and weakened the eastern frontier against Persia by concentrating armies in the west. His legacy was mixed—monumental achievements paired with strategic overextension.
Heraclius' victory over Persia (602-628) came at tremendous cost, with the Persian war devastating both empires. This exhaustion made them vulnerable to the Arab conquests that followed immediately after. The Second Arab Siege of Constantinople (717-718) was repelled through military competence, Greek fire technology, and favorable geography, ensuring the empire's survival.
Kaldellis argues historians have focused excessively on crisis moments rather than understanding the continuous institutional machinery enabling recovery. The empire's resilience derived from: (1) genuine governmental responsiveness demonstrated through action matching rhetoric; (2) universal taxation creating institutional integration across all communities; (3) the threat of internal violence (civil wars) as a check on autocracy; (4) the absence of internal separatist movements or fragmentary tendencies; and (5) a unified Roman and Orthodox identity that made subjects prefer continued membership over conquest by outsiders.
The empire's final decline began in the early 14th century, not from internal decomposition but from civil wars and loss of European territories to the Serbs. By 1340s, the game was effectively over, though Constantinople didn't fall until 1453. This occurred despite the empire retaining taxation capacity, legal systems, and administrative capabilities—suggesting that absent foreign invasions, the fundamental structures could have sustained the state indefinitely.
Kaldellis draws lessons for modern governance: maintaining credibility between rhetoric and action is essential for legitimacy; investing in institutions that serve majority interests (even with taxation costs) provides long-term stability; and the gap between proclaimed goals and actual foreign policy actions damages credibility and public support. The Roman Empire's relative success in this regard contrasts with modern democratic challenges regarding short-term executive thinking and military-industrial pressures that widen rhetorical-action gaps.
On human nature and history, Kaldellis rejects extreme relativism while acknowledging cultural variation. He argues basic human psychology—ambitions, loves, hates, incompetence—remains relatively constant across periods, with culture providing variation rather than determining behavior entirely. He identifies three historical phases (hunter-gatherer, agricultural, industrial-technological) and anticipates a fourth, noting that consciousness and subjective experience may prove to be what humans cannot technologically replicate or replace.
About this episode
<p>Anthony Kaldellis is a historian of the Roman Empire and author of “The New Roman Empire”, a comprehensive history of the Byzantine Empire (Eastern Roman Empire).<br /> Thank you for listening ❤ Check out our sponsors: <a href="https://lexfridman.com/sponsors/ep498-sc">https://lexfridman.com/sponsors/ep498-sc</a><br /> See below for timestamps, transcript, and to give feedback, submit questions, contact Lex, etc.</p> <p><b>Transcript:</b><br /> <a href="https://lexfridman.com/anthony-kaldellis-transcript">https://lexfridman.com/anthony-kaldellis-transcript</a></p> <p><b>CONTACT LEX:</b><br /> <b>Feedback</b> – give feedback to Lex: <a href="https://lexfridman.com/survey">https://lexfridman.com/survey</a><br /> <b>AMA</b> – submit questions, videos or call-in: <a href="https://lexfridman.com/ama">https://lexfridman.com/ama</a><br /> <b>Hiring</b> – join our team: <a href="https://lexfridman.com/hiring">https://lexfridman.com/hiring</a><br /> <b>Other</b> – other ways to get in touch: <a href="https://lexfridman.com/contact">https://lexfridman.com/contact</a></p> <p><b>EPISODE LINKS:</b><br /> Anthony’s Books: <a href="https://amzn.to/49AX7Q1">https://amzn.to/49AX7Q1</a><br /> Anthony’s Publications: <a href="https://kaldellispublications.weebly.com">https://kaldellispublications.weebly.com</a><br /> Anthony’s University of Chicago page: <a href="https://classics.uchicago.edu/people/anthony-kaldellis">https://classics.uchicago.edu/people/anthony-kaldellis</a><br /> The New Roman Empire (book): <a href="https://amzn.to/3PTFTqk">https://amzn.to/3PTFTqk</a><br /> Streams of Gold (book): <a href="https://amzn.to/4fgRMRq">https://amzn.to/4fgRMRq</a><br /> Byzantium & Friends Podcast: <a href="https://byzantiumandfriends.podbean.com/">https://byzantiumandfriends.podbean.com/</a><br /> The History of Byzantium Podcast: <a href="https://thehistoryofbyzantium.com/">https://thehistoryofbyzantium.com/</a></p> <p><b>SPONSORS:</b><br /> To support this podcast, check out our sponsors & get discounts:<br /> <b>Upwork:</b> Platform for hiring freelancers.<br /> Go to <a href="https://lexfridman.com/s/upwork-ep498-sc">https://upwork.com/lex</a><br /> <b>Fin:</b> AI agent for customer service.<br /> Go to <a href="https://lexfridman.com/s/fin-ep498-sc">https://fin.ai/lex</a><br /> <b>BetterHelp:</b> Online therapy and counseling.<br /> Go to <a href="https://lexfridman.com/s/betterhelp-ep498-sc">https://betterhelp.com/lex</a><br /> <b>LMNT:</b> Zero-sugar electrolyte drink mix.<br /> Go to <a href="https://lexfridman.com/s/lmnt-ep498-sc">https://drinkLMNT.com/lex</a><br /> <b>Shopify:</b> Sell stuff online.<br /> Go to <a href="https://lexfridman.com/s/shopify-ep498-sc">https://shopify.com/lex</a><br /> <b>Perplexity:</b> AI-powered answer engine.<br /> Go to <a href="https://lexfridman.com/s/perplexity-ep498-sc">https://perplexity.ai/</a></p> <p><b>OUTLINE:</b><br /> (00:00) – Introduction<br /> (00:11) – Sponsors, Comments, and Reflections<br /> (08:45) – The Roman Empire and the Byzantine Empire<br /> (12:42) – 2,200 Years of Roman History<br /> (33:06) – Power, violence, and civil war<br /> (54:20) – Edict of Caracalla<br /> (1:07:17) – Crisis of the Third Century<br /> (1:21:45) – Constantine and the new Roman Empire<br /> (1:33:46) – Christianity in the Roman Empire<br /> (1:59:14) – Fall of the Western Roman Empire<br /> (2:12:11) – Eunuchs, Taxes, and Power<br /> (2:37:17) – Emperor Justinian and wars of conquest<br /> (2:54:19) – The Arab conquests<br /> (3:13:55) – Why the Roman empire survived so long<br /> (3:40:01) – Lessons from history</p> <p><b>PODCAST LINKS:</b><br /> – Podcast Website: <a href="https://lexfridman.com/podcast">https://lexfridman.com/podcast</a><br /> – Apple Podcasts: <a href="https://apple.co/2lwqZIr">https://apple.co/2lwqZIr</a><br /> – Spotify: <a href="https://spoti.fi/2nEwCF8">https://spoti.fi/2nEwCF8</a><br /> – RSS: <a href="https://lexfridman.com/feed/podcast/">https://lexfridman.com/feed/podcast/</a><br /> – Podcast Playlist: <a href="https://www.youtube.com/playlist?list=PLrAXtmErZgOdP_8GztsuKi9nrraNbKKp4">https://www.youtube.com/playlist?list=PLrAXtmErZgOdP_8GztsuKi9nrraNbKKp4</a><br /> – Clips Channel: <a href="https://www.youtube.com/lexclips">https://www.youtube.com/lexclips</a></p>
Key Insights
- Kaldellis argues the Roman Empire lasted 2,200 years continuously without significant internal decomposition because taxation systems bound all communities into an integrated institutional matrix where no isolated populations could exist, and citizens understood they were taxed in exchange for defensive military protection and legal recourse.
- The empire's political system functioned through what Kaldellis calls a 'perpetual referendum' where emperors faced constant threat of violent overthrow (46% were deposed violently), forcing them to maintain genuine popular support through responsive governance rather than relying on coercive control, making the governmental persona of responsiveness and accountability materially real rather than merely rhetorical.
- Christianity was effectively captured and incorporated into the Roman imperial system rather than triumphing over it—the empire strategically deployed the church as a governmental institution through land grants, charity distribution, and legal authority, resulting in a uniquely integrated relationship between religious and state institutions.
- The empire's resilience derived from recovering after exogenous shocks rather than from the absence of crisis, with distinct cycles of territorial loss followed by administrative reorganization and economic revival, suggesting that absent foreign invasions, the fundamental institutional structures could have sustained the state indefinitely into the modern era.
- Kaldellis contends that historians have misdiagnosed the empire's late medieval decline by attributing it to internal moral decay and civilian ineffectiveness, when in fact the early 14th-century collapse resulted from a three-front invasion (Seljuks, Pechenegs, Normans) that no medieval state could realistically have survived, despite the empire retaining functional taxation and legal systems.
Topics
Transcript
The following is a conversation with Anthony Kaldalis, a historian of the Eastern Roman Empire, also known as the Byzantine Empire. And now a quick few second mention of each sponsor. Check them out in the description at lexfriedman.com slash sponsors. It's the best way to support this podcast. this podcast. We got Upwork for hiring quality freelancers, Finn for customer service AI agents, BetterHelp for mental health, Element for electrolytes, Shopify for selling stuff online, and our old friend Perplexity for curiosity-driven knowledge exploration. Choose wisely, my friends. And if I may call you as such my fellow Roman history enthusiasts. It is not always true that the memes on the interwebs carry within them an accurate depiction of…
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