No urban achievements without agricultural achievements. On 14 December 2012 we saw how this was true for the Egyptians and Maya. Now let’s take a look at the Greek, the Romans, the Asians and the Northern Europeans.
Greece has never been blessed with a lot of fertile soil. In Ancient times, less than 20% of the land could be used for farming. So, as soon as the Greek had figured out how to follow the Phoenicians in building reliable ships (around 800 BC), they started sailing the Black and Mediterranean Sea, establishing some 500 colonies in fertile areas. This marked the beginning of a flourishing civilization with city states building a powerful culture on food that was shipped from other places.
Like the ancient cities of Greece, there would not have a been a big and powerful Rome without a steady stream of food supplies from other parts of Europe. According to the Roman-Jewish historian Josephus, North Africa supplied Rome eight months of the year, Egypt the other four.
So, feel free to build your metropole anywhere you like, just make sure you have some friends that are able and willing to feed you on a daily basis.
In Asia we see a pretty clear pattern: cultivate rice and empires arise. Behind the power and cultural achievements of the Gupta dynasty in India (320-535), the Tang dynasty in China (618-907) and the Silla dynasty in Korea (668-935) lies a massive investment in new rice fields. The same can be said about the powerful states of Java and Sumatra in the same period.
It wasn’t much fun being a farmer in Northern Europe before the heavy plough arrived in the Middle Ages. Until then, ploughs couldn’t plough deep enough to turn over the heavy clay soil. But the heavy plough made it possible, and around 1000 AD the land between the Loire and the Elbe had become a patchwork of grain fields. And as clay soil was more fertile than the lighter soil types of Southern Europe, this caused a major power shift from the south to the north. Professor Thomas Barnebeck Andersen of the University of Southern Denmark:
The heavy plough turned European agriculture and economy on its head. Suddenly the fields with the heavy, fatty and moist clay soils became those that gave the greatest yields.
The economy in these places improved and this sparked the growth of big cities with more people and more trade. The heavy plough started an upward spiral in new areas.
My point may be clear: no urban achievements without agricultural achievements.