Passage 2: Rethinking Ancient Trade Roads
When people imagine the ancient trade routes that linked distant civilisations, they often picture a single great road along which merchants carried precious goods from one end of a continent to the other. The reality, according to a growing number of historians, was quite different. Most long-distance trade in the ancient world was not conducted by individuals travelling thousands of kilometres, but by a chain of local traders, each of whom carried goods only a short distance before selling them on. A bale of cloth might change hands a dozen times before reaching its final buyer, and its price would rise at every stage. Few merchants, in other words, ever saw both ends of the route along which their goods travelled.
The routes themselves were rarely roads in the modern sense. Away from the great cities, they were often no more than networks of tracks, chosen because they passed close to wells, rivers or grazing land. Over time, these tracks shifted as water sources dried up, as political borders changed, or as bandits made one path too dangerous. Archaeologist Dr Lena Strand, who has spent fifteen years mapping routes across semi-arid regions, describes them as 'braided' rather than fixed. 'A route was more like a river delta than a motorway,' she explains. 'There were always several parallel paths, and traders chose between them according to the season and the news they heard along the way.'
Among the most important features of these networks were the roadside inns, where travellers and their animals could rest. The largest were fortified buildings arranged around an open courtyard, with stables on the ground floor and rooms for merchants above. They were typically built a day's journey apart, which for a loaded caravan meant somewhere between thirty and forty kilometres. Beyond simply providing shelter, inns functioned as markets, banks and centres of information. Here a merchant might learn of a price rise in a distant city, find a partner for the next stage of a journey, or leave goods in storage until conditions improved.
The animals that made overland trade possible deserve as much attention as the merchants. Camels, which could travel for several days without water and carry loads of up to 250 kilograms, were essential in the driest regions, and a single caravan might include several hundred of them. In mountainous areas, however, they were often replaced by mules or yaks, which were more sure-footed on steep and narrow paths. Historian Professor Amir Haddad has argued that the spread of camel transport did more to expand trade than any political event, since it made routes across the desert reliable for the first time. Not all scholars agree. Dr Strand points out that camel caravans were expensive to equip and that most goods continued to travel by sea whenever possible.
What was carried along these routes is also being reconsidered. Older accounts focused on luxury goods such as silk, spices and precious stones, largely because these feature most prominently in written records. Recent excavations, however, have uncovered large quantities of far more ordinary items, including pottery, dried fruit, salt and iron tools. Dr Yusuf Okoro, who studies food residues on pottery fragments, believes that everyday goods probably made up the majority of trade by volume, even if luxury items generated most of the profit. 'Written sources tell us what the wealthy cared about,' he says, 'but rubbish heaps tell us what ordinary people actually bought.'
Perhaps the most significant cargo of all, however, could not be weighed. Ideas, beliefs and technologies travelled along trade routes alongside goods. Techniques for making paper, glass and certain kinds of steel spread from region to region in this way, as did new crops, musical instruments and religious traditions. Many of these exchanges are difficult to trace precisely, since a technique could be adopted, modified and passed on several times before anyone wrote about it. Unfortunately, diseases spread too. Several historians have linked major outbreaks of illness in the ancient and medieval world to the movement of traders and their animals, which carried infections into populations that had no previous exposure to them.
Modern technology is now helping researchers to reconstruct routes that disappeared long ago. Satellite images can reveal the faint outlines of abandoned tracks and buildings that are invisible from the ground, while chemical analysis of animal bones found at inns can show where those animals grazed during their lives. Dr Okoro's team has also developed a computer model that predicts the most likely path between two points by calculating the effort involved in crossing different kinds of terrain. When the model was tested, it correctly identified the locations of four inns that had never been recorded before. Such discoveries suggest that the story of ancient trade is still far from complete.
