In his latest Age of Invention newsletter, Anton Howes compares the views of today’s “urbanists” with the “agglomerationists” of the late Medieval period:

John Norden’s map of London in 1593. There is only one bridge across the Thames, but parts of Southwark on the south bank of the river have been developed.
Wikimedia Commons.

The other day, economic historian Tim Leunig tagged me into a comment on twitter with the line “intellectually I think the biggest change since settled agriculture was the idea that most people could live in cities and not produce food”. What’s interesting about that, I think, is the idea that this was not just an economic change, but an intellectual one. In fact, I’ve been increasingly noticing a sort of ideology, if one can call it that, which seemingly took hold in Britain in the late sixteenth century and then became increasingly influential. It was not the sort of ideology that manifested itself in elections, or even in factions, but it was certainly there. It had both vocal adherents and strenuous opponents, the adherents pushing particular policies and justifying them with reference to a common intellectual tradition. Indeed, I can think of many political and economic commentators who are its adherents today, whether or not they explicitly identify as such.

Today, the people who hold this ideology will occasionally refer to themselves as “urbanists”. They are in favour of large cities, large populations, and especially density. They believe strongly in what economists like to call “agglomeration effects” — that is, if you concentrate people more closely together, particularly in cities, then you are likely to see all sorts of benefits from their interactions. More ideas, more trade, more innovation, more growth.

Yet urbanism as a word doesn’t quite capture the full scope of the ideology. The group also heavily overlaps with natalists — people who think we should all have more babies, regardless of whether they happen to live in cities — and a whole host of other groups, from pro-immigration campaigners, to people setting up charter cities, to advocates of cheaper housing, to enthusiasts for mass transit infrastructure like buses, trams, or trains. The overall ideology is thus not just about cities per se — it seems a bit broader than that. Given the assumptions and aims that these groups hold in common, perhaps a more accurate label for their constellation of opinions and interests would be agglomerationism.

So much for today. What is the agglomerationist intellectual tradition? In the sixteenth century, one of the mantras that keeps cropping up is the idea that “the honour and strength of a prince consists in the multitude of the people” — a sentiment attributed to king Solomon. It’s a phrase that keeps cropping up in some shape or form throughout the centuries, and used to justify a whole host of agglomerationist policies. And most interestingly, it’s a phrase that begins cropping up when England was not at all urban, in the mid-sixteenth century — only about 3.5% of the English population lived in cities in 1550, far lower than the rates in the Netherlands, Italy, or Spain, each of which had urbanisation rates of over 10%. Even England’s largest city by far, London, was by European standards quite small. Both Paris and Naples were at least three times as populous (don’t even mention the vast sixteenth-century metropolises of China, or Constantinople).

Given their lack of population or density, English agglomerationists had a number of role models. One was the city of Nuremburg — through manufactures alone, it seemed, a great urban centre had emerged in a barren land. Another was France, which in the early seventeenth century seemed to draw in the riches to support itself through sheer exports. One English ambassador to France in 1609 noted that its “corn and grain alone robs all Spain of their silver and gold”, and warned that it was trying to create still new export industries like silk-making and tapestry weaving. (The English rapidly tried to do the same, though with less success.) France may not have been especially urban either, but Paris was already huge and on the rise, and the country’s massive overall population made it “the greatest united and entire force of any realm or dominion” in Christendom. Today, the population of France and Britain are about the same, but in 1600 France’s was about four times as large. Some 20 millions compared to a paltry 5. If Solomon was right, then England had a lot of catching up to do to even approach France in honour.