In our archetypal part from Issue 27, Patrick Fitzsimmons explains what really ended the Bronze Age.
Over three thousand years ago, on a plain beside the Orontes River in Syria, two awesome armies conflicted in what may at the period have been the most colossal battle always seen: the Battle of Kadesh. The two combatants, the Egyptians and the Hittites, together put onward tens of thousands of soldiers and complete five thousand chariots, making the figure of combatants comparable to several smaller First World War battles, and fairly apt bigger than Agincourt, Hastings, and Yorktown. It was additionally the archetypal battle whose events can be reconstructed in detail, as Pharaoh Ramesses II afterwards commissioned detailed rock reliefs depicting the battle as a monumental victory, which remain in temples dotted throughout contemporary Egypt to this day.
The Egyptians and the Hittites were two of multiple awesome powers afterward foremost in the east Mediterranean. Others were the Assyrians, the Babylonians, and Mycenaean Greeks. All were bureaucratically complex societies, in several cases controlling territories of hundreds of miles, capable of mobilizing armies, extracting taxes, and completing aspiring infrastructural projects. But fair a few centuries following the Battle of Kadesh, all had disappeared or dwindled to a fraction of their erstwhile power.
The Bronze Age downfall – as this abrupt disappearance of local powers is known – is among the awesome mysteries of ancient history. The customary clarification points to a sequence of catastrophes about 1200 BC: droughts, mysterious invaders called the Sea Peoples, famines, and inner revolts. But specified explanations are insufficient as catastrophes akin these frequently create governmental upheaval without permanently ending civilizations. The inquiry is not why the Bronze Age empires fell, but why, following they fell, nothing akin them returned for centuries. Why did it abruptly rotate into so hard, seemingly, to build and prolong an empire?
If you go to see Ramesses’s rock reliefs today, your tour guide power inform you that the two sides at the Battle of Kadesh wielded bronze weapons, average for imperial armies of the time. Bronze is an blend of copper and tin, and the tin in those bronze weapons would have had to have traveled thousands of miles from distant mines, perchance in contemporary Afghanistan or in Western Europe. The difficulty engaged in mining and transporting tin is one logic that admission to bronze weaponry remained concentrated in armed forces and choose institutions. The average inhabitant motionless mostly relied on tools made of copper, stone, bone, or wood. But fair a few centuries following Kadesh, average Hittite and Egyptian farmers had admission to a new material: iron.
Because metal could be produced locally, imperial centers no longer had specified a powerful advantage complete their topic peoples. The innovation of metal weaponry meant the governmental balance was everlastingly changed.
Today, we live in an era anywhere admission to the tools of aggression has been exceptionally concentrated, allowing superpowers far larger than those of the delayed Bronze Age to reign mostly unchallenged. But as armed forces innovation evolves, another age of upheaval may be approaching.
The innovation of bronze had already displaced an before metal: copper. The Copper Age began about 5000 BC and ran until about 3000 BC, whenever bronze weapons began appearing in the archaeological record. Copper was accessible adequate and uncomplicated adequate to activity that it allowed first proto-states to reliably arm their warriors alongside item improved than rock weaponry, which frequently chips or breaks under impact. Copper is a gentle metal, hence its use in pipes and wiring today. But it mostly won’t break, and although it does curve effortlessly it can additionally be disposed rear into shape. This marginal advantage was adequate to provision groups alongside copper weapons a important advantage.
Copper-wielding groups pushed into surrounding communities who used rock tools, commencement a procedure of prehistoric governmental consolidation. We see an addition in the figure of fortified settlements, rising inequality in the grave goods alongside which group were buried, suggesting deepening hierarchies, and complex smelting sites as far as sixty miles distant from anywhere copper was mined, suggesting risen financial specialization.
Copper weapons were eventually made obsolete by the innovation of bronze, made by combining copper and tin. Bronze is harder and stiffer, and volition clasp a sword’s border for longer, which gave bronze-wielding groups a powerful armed forces advantage.
The dispersed of bronze preceded a motion of imperial conquest throughout the east Mediterranean. The Annals of Hattusili I, a cuneiform tablet established in the 1950s, particulars the enlargement of the Hittite empire from its center in chief Turkey to the Aegean Sea in the west and the Euphrates in the east during the 1600s BC. While the tablet is regal propaganda, the Hittites evidently viewed their former as one of conquest complete surrounding groups: the tablet boasts of abroad cities sacked and burned, alongside weeds sown on the sites anywhere they formerly stood. Egypt additionally saw its district develop to merge ample parts of Nubia and the Levant at about this time. These armed forces successes would not have been imaginable without bronze.
Copper had arrive alongside a growth in social complexity and governmental consolidation as the metal element required knowhow and social institution to mine, transport, anneal and smelt, and gave groups employing it an border complete rock users. Bronze entrenched this advantage because of a sole geological fact: during copper had been slightly rare, the tin required to change it into bronze was equal rarer.
The important tin deposits accessible to Bronze Age peoples from 3000–1200 BC were in contemporary Afghanistan, France, Iberia, and Cornwall, in southwest England. Distinctive chemic features of idiosyncratic deposits average we can track fair how far tin mined in these places spread. Tin alongside trace levels of indium, particular to the Cornish deposits, has been established in shipwrecks near Israel and southernmost France, showing that Cornish tin traveled for thousands of miles. Smaller deposits existed in Turkey, the Eastern Desert of Egypt, and Iran.
The city-state of Mari in modern-day Syria acted as a tin hub, importing the metal element from sources in the east and shipping it west up the Euphrates River. Texts from the eighteenth hundred years BC record that Mari’s tin traveled complete five hundred miles from a kingdom called Elam, which was itself another thousand miles from the Afghan mines that were its apt source. In supplement to the extend and the difficult terrain, an ancient dealer would have to concern concerning roaming bandits and assured abroad states alongside the way. Tin was extremely difficult for Bronze Age group to get clasp of, making bronze weapons expensive.
This had a profound governmental consequence: elites had a important advantage in accessing the tools of violence. While smaller city-states could additionally get their hands on bronze, larger and additional complex empires could do so additional reliably. It was easier for them to get supplies, safe commerce links, create stockpiles and substitute losses. A Bronze Age king could site and prolong an armed forces that smaller forces merely could not match. Peripheral communities at the edges of empires power oppose for a while, but maintaining a earnestly rivalrous armed forces complete period required province capability that smaller forces mostly lacked.
At the period of the Battle of Kadesh, the east Mediterranean and Near East were filled alongside competing awesome powers: the Hittites had conquered most of Anatolia, the Egyptians controlled an area that stretched downward into Sudan, the Assyrians and Babylonians vied for control in Mesopotamia, and southernmost Greece was ruled by a constellation of principalities including Mycenae, Pylos, and Thebes. These were advanced, bureaucratically organized societies that extracted labor, taxes and tribute from subjects and surrounding peoples.
Around 1200 BC, the scheme bankrupt down. The archaeological document shows the imprint of bursts of aggression before awesome empires disappeared. Greek palaces display ‘destruction layers’, archaeological evidence of burning, from a abbreviated duration about this time. Similar scorch marks and scattered bones have been unearthed at Troy in a tier contemporary alongside the end of the Bronze Age.
In Greece, the kingdoms that had ruled the mainland crumbled so entirely that the ensuing centuries were termed the Greek Dark Ages. The Hittite Empire, which had matched Egypt at Kadesh, practically vanished. A centuries-long document of clay tablets detailing the culture’s laws, rituals, and writings abruptly stops at about 1200 BC. Egypt itself survived, but shrank, losing its Levantine territories and never recovering its erstwhile attain or imperial power. Similarly, Assyria contracted rear to its inland imperial capital, and Babylonia, shaken by the downfall of the 440-year-old Kassite ruling dynasty, barely managed to limp on.
The resulting power vacuum set the phase for new empires to emerge, but that did not happen. Something was preventing the reconsolidation of small polities into huge empires. The causes of the Bronze Age downfall are motionless debated by historians: a sequence of severe droughts; the abrupt appearance of mysterious Sea Peoples, who raided alongside the Mediterranean coast; the disruption of the tin commerce routes; inner revolts; or perchance all of these at once. But there is another unifying aspect that could have prevented the resurgence of empires: iron.
Iron itself was not a new discovery. Bronze Age group had encountered the metal element whenever it cut to Earth in meteorites, but they mostly lacked the capability to quarry and extract it for themselves. Objects made of meteoric metal were luxury items: they have been established in regal tombs, including Tutankhamun’s, and are referenced in religious texts as ‘metal of the sky’.
This changed towards the end of the second millennium BC, whenever group discovered how to extract metal from deposits in the dirt and activity it into tools and weapons. The issue is that metal requires much higher temperatures to melt than the metals used so far. Tin melts at 232 degrees Celsius, uncomplicated to attain in normal fires. Copper melts at 1,085 Celsius, achievable alongside a essential clay or rock furnace. Iron requires 1,538 degrees Celsius, which was unattainable alongside the innovation of the time. But Iron Age metallurgists established a way about this problem: the bloomery.
Bloomeries are a category of furnace that use bellows to shove in additional air (and thus oxygen), creating a hotter blaze that could attain 1,200–1,300 Celsius. This wasn’t hot adequate to melt iron, but it didn’t need to be. The key was that the impurities in the metal ore would be drawn off, leaving clean iron. Ancient metallurgists were operating alongside ores of metal oxide. A bloomery burned charcoal to create carbon monoxide, which drew oxygen out of the metal oxide; another impurities melted downward into a liquid runoff, several of which could drain out of the resulting chunks of softened iron. These chunks would afterward be removed from the blaze and, during motionless slightly softened, hammered to shove out remaining impurities and weld the metal into a denser mass, leaving usable metal element that could be reheated and worked into distinct shapes.
We don’t cognize for certain anywhere this method was invented. One imaginable base is in India, anywhere we discover metal and bloomery byproducts in deposits alongside radiocarbon dates from about 1400 BC or equal earlier. Another possible is contemporary Georgia, anywhere we discover evidence of copper workshops experimenting alongside new methods of metal element production. Quite apt there were multiple autonomous origins of the new method, akin to the multiple origins of bronze metallurgy or agriculture. The method reached modern-day Iran, Mesopotamia, and the east Mediterranean complete the next few hundred years, but it would obtain a millennium to attain the occidental Mediterranean at the identical flat of production.
The advantage of the former scientific leap, from copper to bronze, was that bronze is a stronger, stiffer, tougher metal element better in battle. Iron is different: it is not a improved matter than bronze. Good bronze is the two harder than metal and additional predictable. It additionally has the advantage of a lesser liquefying point, definition a damaged bronze blade can be melted and recycled into a new one. So why did metal rotate into dominant?
While the tin needed to create bronze could be established lone in a few deposits in far-flung corners of the known world, metal is the fourth most abundant component in Earth’s crust. Many metal ores are additionally uncomplicated to place on the exterior of the ground. Goethite has recognizable black-brown color; limonite is a type of goethite alongside a yellow tinge (when blended alongside dirt and clay it is known as ‘yellow ocher’, giving its name to the color); and hematite is a reddish-brown type that leaves a rusty red streak whenever marked against a surface. An ancient miner could effortlessly acknowledge deposits as lengthy as they knew what to appearance for.
Transporting tin required a dealer consenting to assume the disbursal and risks of a journey, but the average Iron Age smith could discover sources much nearer to home. One analysis of Iron Age artifacts in Denmark established that the metal was derived from ‘bog iron’ ores that were abundant in local wetlands, smelted alongside charcoal from local forests.
This new innovation had momentous governmental implications. Since metal could be smelted locally, earlier peripheral communities could arm themselves alongside weapons that were, for applicable purposes, comparable to the weapons of the choose in the empire’s core. In difference to bronze, metal democratized violence.
The effects of metal were so stark that ancient writers in the consequent centuries began separating individual former into the bronze and metal eras. Hesiod described the age of metal as a period of suffering and strife, anywhere no man knew a day or night liberated of toil or pain. Herodotus writes in his Histories that operating metal was ‘the woe lying upon woe, since metal had been invented to the detriment of mankind.’ These writers connected metal alongside war and decline; several additionally alluded to the idea that metal had democratized violence. The Hebrew Bible records that the Philistines attempted to bounds admission to smiths as they were concerned others could effortlessly create metal weapons. Lucretius describes the Bronze Age as a period whenever ‘naked men gave way to well-armed foes’ but stated that metal made ‘the likelihood of war equal as they had not been before’. With the advent of iron, the disbursal of war fell: a king could not keep others from accessing a armed forces innovation established in local soils.
On maps of the east Mediterranean before and following the dispersed of iron, the difference is stark. There are no first Iron Age empires as ample as their Bronze Age predecessors. The downfall of the Hittite Empire remaining a governmental vacuum in contemporary Turkey and Syria, but alternatively of another empire emerging in its place, we see a patchwork of smaller states, none of which method the identical levels of control and institution for centuries. A akin narrative can be told in mainland Greece, and in the parts of the Levant earlier occupied by Egypt.
The archaeological document allows us to difference rates of aggression before and following iron. A recent study looked at skeletal remains from the Middle East throughout multiple millennia. By looking at fracture patterns, researchers can infer whether skeletal damage was sustained during person was alive, or following they were already deceased and buried (for instance, damage caused by animals or by bodily weathering). Researchers can additionally create inferences from factors specified as the viewpoint of fractures and anywhere they are located. In the case of skull trauma, for instance, fractures caused by aggression normally happen complete anywhere a hat would remainder on your head. Once the skeletons are dated, we can track the trend of weapon-inflicted injuries complete time. Compared alongside the Middle Bronze Age, before the innovation of iron, skeletons from the Late Bronze Age and Iron Age display additional signs of violence.
Databases of battles, made alongside evidence from archaeological sites and historic records, authorize a difference of the amount of war before and following the acceptance of iron. My study according to these databases finds a keen increase in the figure of battles in the hundred years following regions adopted metal compared alongside the one before. Whether this addition is caused by metal or if the databases portray a complete example is up for debate.
Ancient records authorize us to build timelines of rulers of Babylon, Assyria, and Athens throughout the Bronze and Iron Ages. These aren’t ideal datasets (in the case of the Athenian records, they are plainly lone semi-historical: known historic figures appear alongside mythological entities specified as Cecrops I, recorded as a half-man, half-serpent king in the sixteenth hundred years BC). But insofar as we can depend on them, they display a apparent alter following metal is introduced. The average dimension of reigns throughout the example of Assyria, Babylon, and Athens taken together falls 29 percent, and Babylon sees nearly twice the figure of kings in the centuries following metal adoption. These common changes propose expanding governmental instability resulting from a profound change in the balance of power.
History has seen the ebb and stream of centralized and decentralized technologies of war always since. Castles allowed barons of medieval Europe to subjugate the peasantry during additionally contending alongside their kings, until the gunpowder upheaval eventually made castle walls obsolete. Gunpowder led to firearms, which strengthened states during they were new, scarce, and expensive, but afterward became cheap and effortlessly accessible in the nineteenth and twentieth centuries, shifting power to peripheral groups of soldiers and rebels. On the earth stage, nuclear weapons have massively risen the expenses of one nation invading another; for a small state, achieving nuclear position can be a mighty equalizer. With all development, the balance of power shifts.
To comprehend the governmental consequences of new technologies, we need to comprehend how they form power. Some technologies, akin castles, alter the offense-defense bias – whether it is easier to assault or defend. Others, akin iron, alter who has admission to weaponry. A apparent modern-day parallel is drones, which have been transformative in the Russia–Ukraine war and are reportedly liable for up to 80 percent of latest casualties in that battle as of 2026. A drone costing fair a few hundred dollars can endanger a tank, ordnance gun, or command article value many times more. Drone combat has lowered war’s disbursal of admission and could create it easier for small guerrilla groups to difficulty foremost powers.
Another parallel can perchance be seen in AI. Access to AI is decentralized in that many individuals can use it, to possibly destructive effect. However, AI providers have the capability to concentration power. Access can be cut off, centralizing the use of AI in the hands of the companies that own it and whomever they choose to authorize access, akin to the advantage enjoyed by Bronze Age kings who controlled stores of tin.
Iron and its consequences laid the basis for new institutions that underpin our contemporary lives. Greek democracy, Phoenician commerce and writing, and the Abrahamic religions all developed inside the new governmental surroundings of the Iron Age. The earth was changed not by an apocalyptic event, but by the products of small settlement forges, which meant the aggression possible that had been concentrated in palaces was distributed to the lowest farmer, ending the balance that had sustained imperial lineages for a thousand years. The next millennia volition be likewise shaped by the armed forces innovation of today.
Patrick Fitzsimmons is a postdoctoral chap at the University of Pennsylvania.
