Movement of Goods into Cities

The wealth of a city was never just about what it produced. It was about what it could bring in. Mesopotamia’s southern plains were extraordinarily fertile, but that fertility came with a serious drawback: the region was almost entirely poor in mineral and building resources. Stones suitable for tools, seals, or jewellery were scarce in most of the south. The local woods — the Iraqi date-palm and poplar — were too soft and weak for making carts, cart wheels, or boats. And there was no metal at all for tools, vessels, or ornaments.

So the Mesopotamians had to look outward. The most reasonable conclusion is that they traded their abundant textiles and agricultural produce for the things they lacked: wood, copper, tin, silver, gold, shell, and various stones. These came from Turkey and Iran, or from across the Gulf. Those regions had the mineral wealth Mesopotamia lacked, but they had far less scope for agriculture. The two sides were natural trading partners — each had what the other needed.

But trade across such distances was not automatic. It required organisation. Someone had to equip the foreign expeditions, decide what to send, and direct the exchanges. The people of southern Mesopotamia took on this role. Regular exchanges were possible only because a social organisation existed to manage them — this was not casual barter but a planned, sustained system of trade.

Trade and crafts were not the only foundations of urban life. Efficient transport mattered just as much. A city cannot survive if it costs too much time or too much animal feed to bring grain or charcoal in on pack animals or bullock carts. If the cost of moving goods is too high, the city economy simply will not work. The cheapest mode of transport, everywhere, is water. River boats or barges loaded with sacks of grain could be propelled by the current of the river or by the wind — no feeding required. Animals, by contrast, had to be fed whether they were working or not.

This is why the canals and natural channels of ancient Mesopotamia were so important. They were not just for irrigation; they were the actual routes of goods transport between large and small settlements. The Euphrates, in particular, was more than a local river — its role as a ‘world route’ becomes clear in the account of the city of Mari later in the chapter.

The same practical need that drove trade also drove the invention of writing. Every society has a language — spoken sounds that carry meaning. That is verbal communication. Writing is also verbal communication, but in a different form: it represents spoken sounds in visible signs. When we speak of a script, we mean exactly this — the visible representation of sound.

The first Mesopotamian tablets, written around 3200 BCE, contained picture-like signs and numbers. These were roughly 5,000 lists — records of oxen, fish, bread loaves, and similar goods. Specifically, they were lists of goods brought into or distributed from the temples of Uruk, a city in the south. The picture-like signs included things like an ox, a fish, grain, and a boat, alongside numbers. Each tablet was small, 3.5 cm or less in height. …