Quote · Lex Fridman Podcast
#498 – Anthony Kaldellis: Roman Empire, Byzantine Empire, Rise & Fall of Empires
Where this was said
The Arab conquests
At 3:09:10 · chapter starts 2:54:19
The Arab conquests are, in Kaldellis's telling, almost overdetermined. Rome and Persia fought a catastrophic war from 602 to 628 AD that left both empires depleted of manpower, revenue, and strategic coherence. Arab Muslim armies then struck from Arabia — a direction neither empire had ever considered a military threat — and conquered Syria, Palestine, and Egypt in roughly a decade. The loss of Egypt was particularly devastating: it had been the grain source for Constantinople, and its loss caused the capital's population to plummet over the following decades. Kaldellis offers a measured assessment of Heraclius, who is often lionized as the heroic defender of Rome: yes, he defeated Persia, but he had partly caused the crisis by initiating a civil war that diverted Roman armies away from the Persian front [1] — Anthony Kaldellis "Rome and Persia fought a catastrophic war from 602 to 628 AD that left both empires depleted of manpower and resources. Then Arab Muslim ar…" 2:55:08 . And his victories against Persia left the empire no stronger against the Arabs, who arrived just a few years later. Survival came through a long, painful retreat: pulling armies back into Asia Minor, fortifying Constantinople into an effectively impregnable bunker, developing Greek fire (a pressurized flammable compound that burned on water, even existing in hand-grenade form, whose exact composition remains a state secret to this day), and eventually defeating two Arab naval sieges of Constantinople. It took until the 660s and 670s to stabilize the line.
Rome and Persia fought a catastrophic war from 602 to 628 AD that left both empires depleted of manpower and resources. Then Arab Muslim armies struck from a direction neither empire had ever prepared to defend — Arabia was simply not considered a military threat. The outcome was almost inevitable: the Arabs conquered Syria, Palestine, and Egypt in a single decade, stripping Rome of its richest provinces.
Greek fire was a pressurized, flammable compound that burned on water and could not be extinguished, deployed through heated nozzles on Byzantine warships. It was so classified that even today historians debate exactly how it worked. The Eastern Roman Empire used it to defeat two Arab sieges of Constantinople, and later incinerated Viking fleets in the 940s and 1040s. They even had a hand-grenade version.
In over 1,200 years of Eastern Roman history, Bulgaria was the only territory that actively sought and achieved independence, underscoring how remarkably absent separatist or centrifugal forces were throughout the empire's existence.
