Monthly Archives: April 2022

Building an Economy: Cities and the Wealth of Nations

13 Wednesday Apr 2022

Posted by in Economics, Politics, Politics for Worldbuilders

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Suppose you’re writing a story that involves trade between cities, or maybe between a city and a rural area. Maybe your protagonist is a merchant, or a farmer selling goods in the marketplace, or the Lord Mayor. So you’d better have at least some concept for how a city economy works, and how cities interact with their surrounding regions. There is much to say about the topic, of course; Fernand Braudel (for one) wrote three massive books on cities and capitalist economies. But you’re not writing an economics textbook; you just want a simple yet powerful model to sketch out some background for your story. If so, you’re in luck. I love simple and powerful models, and here’s a good one.

Writing in the 1980s, the pioneering student of cities Jane Jacobs produced a short, scintillating book that should have been like a torpedo into the waterline of conventional economics, Cities and the Wealth of Nations. She argued that most national economic policy was wrongheaded, because it focused on economic activity at the national level, rather than at the level of the fundamental unit of economic activity: the city. Globalized supply chains of the type we are familiar with, on the other hand, don’t tend to produce regional prosperity, because they don’t generate complementary webs of economic activity in the places that feature nodes of the supply chain.

Needless to say, Jacobs’ work has not been popular among the business class or conventional economists. And many of her arguments get complicated by the radical decentralization of the internet. Still, especially for authors writing about pre-internet societies, Jacobs’ work provides a useful set of tools for understanding complex economic effects. If you want to feature economic change as a major contributor to your plot, read on.

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Jacobs argued that the main way that a city can generate sustainable prosperity is by developing local industries that produce things that the city formerly imported. This allows the city to internalize the profits that formerly went to the trade partners. But more importantly, it allows the city to develop webs of technical expertise and complementary industries, which it can then build on to grow related industries and replace more complex imports, and so on.

Meanwhile, the city does not import any less than it once did; it may in fact import more as it grows wealthier. But it does import different things than before (including innovative goods produced by other cities), raising its material standard of living. Imports thus play three roles: they are consumed; they are the earnings of successful economic development, and thus stimulate that development; and they are candidates for local replacement. (This makes them different, and more economically potent, than simply throwing money at a city in order to magically produce economic growth.)

(This echoes our discussion of energy surpluses as the spur to material and cultural development.)

As the city replaces imports, it exerts five kinds of forces on surrounding regions:

  • Enlarged markets for new goods from rural regions or other cities;
  • Increasing numbers and kinds of jobs in the import-replacing city;
  • Displacement of former city industries into surrounding rural areas;
  • New uses of technology, especially to increase rural productivity; and
  • Growth of city capital.

When these five forces are in balance, they tend to make the surrounding region more prosperous as well, anchoring a general growth in wealth and human flourishing. That is, a balanced city turns its hinterland into a city region. A city region benefits from the increased economic activity of the city, but is not distorted by it; it still produces more for its own use than for export to the city. But the availability of city markets for rural goods, city jobs for people who lack employment at home, and new industries spilling out from the city, along with new productive technology and the money to pay for its use, make the city region thrive.

The five forces often do not act equally, however. When one or two of the forces acts with disproportionate power on a given region, the region becomes distorted in characteristic ways.

A stagnant region, for example, features widespread poverty, a sluggish economy, and a low level of technology. If a nearby city becomes more prosperous, the stagnant region does not benefit. It cannot produce much that the city needs, and for whatever reason cannot support the industries that are being displaced from the city. What does happen is that the most productive and adventurous people living in the stagnant region pull up stakes, and move to the city to work. The stagnant region, already in a desperate state, becomes hollowed out as its workers leave. If workers send remittances home, that can help improve the standard of living of those still there; but only by funding current consumption. Such remittances don’t tend to generate local industries and economic growth, because the stagnant region cannot support new businesses or work the way that the city can.

In a clearance region, on the other hand, new technology makes production more efficient, displacing some of the existing workforce, but few or no new jobs are forthcoming. Many people are driven from the land or from their previous jobs, and they suffer as a result. The ones who are able to stay, on the other hand, benefit from the new technology and their improved productivity. For example, in the 1970s, India, seeking to improve conditions for the rural poor, sponsored the development of a bicycle-powered spinning wheel. Using it, a villager could produce as much yarn as twelve workers using traditional spinning wheels. However, the other eleven villagers, who had spent their whole lives spinning wool, had no other work to do; the new spinning wheel simply made them destitute, even as the first worker benefited. So India could not dare to encourage the use of the labor-saving device it sponsored.

If growing city capital and growing city markets combine in an unbalanced search for raw materials, a region can be transformed into a supply region, where economic activity is dominated by the extraction and transport of raw materials for export (like timber, iron, or coal). Without new local industries to balance out the economic effects of the city’s inexorable need for raw materials, most workers in the supply region will depend on supplying the one thing that the city wants. Extractive activity doesn’t tend to generate new webs of productive or commercial expertise in the supply region; the region instead goes through unproductive booms and busts as its main resource becomes more or less valuable. This is the “banana republic,” the “oil town,” where momentary wealth goes into expensive imports from the outside world that do not generate sustainable prosperity in the region itself. (Partly due to the “Dutch Disease” or “Resource Curse,” which I hope to discuss in a later post.) If the supply region is particularly unfortunate, its populace may even be enslaved by the armies of the cities that need its resources. The Congo Free State was a particularly tragic example.

Finally, some regions are lucky enough (or so they think) to attract an economic transplant. These are large factories belonging to huge companies trying to create a regional, national, or even global supply chain. However, transplant factories are not integrated into the local economy, but are like self-contained bubbles of productive capital, parachuted from the sky. Unlike factories that emerge organically in a city or city region, the transplant factory might employ local workers but does not depend on local support industries and so does not generate complementary economic activity or technological development. Specialized equipment and the technicians who get it working are flown in from the company’s home base; production inputs might come from another country, or several other countries; and the local workers don’t tend to learn transferable skills. Even though local governments often compete furiously to attract such transplants, they rarely end up generating broad growth as the governments hope.

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Now, Jacobs’ theory predated the internet, and even when it was written it had detractors. But for authors’ purposes, it gives a handy set of conceptual tools we can use. Five major forces that productive cities exert on other cities or regions; four examples of what happens to regions when those forces are out of balance. Easy to wrap your head around, but rich enough to generate lots of story texture.

Plus, material for new stories. (How many fantasy stories spend a lot of time on the trade between cities? I’d sure like some more.)

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(This post is part of Politics for Worldbuilders, an occasional series. Many of the previous posts in this series eventually became grist for my handbook for authors and game designers, Beyond Kings and Princesses: Governments for Worldbuilders. The topic of this post belongs in the planned second book in this series, working title Tyranny for Worldbuilders. No idea when it will be finished, but it should be fun!)

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Building an Economy: Energy

11 Monday Apr 2022

Posted by in Economics, History, Politics, Politics for Worldbuilders, State Formation, Writing

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In my quest to give worldbuilders powerful tools to make their stories cooler, I’ve hesitated for a long time to tackle the subject of wealth and economics. Economics matters for politics quite a lot, and authors who want grist for compelling conflicts can find an embarrassment of riches here, so to speak. But how the heck do you turn such a complex subject into a useful model?

However, my recent post on the vicious internal politics of the Russian economy proved illuminating. I now think that the correct approach is not to try and jam all of political economy into a single model. Instead, we’re going to lay out several distinct lenses that you can pick and choose between, to organize your worldbuilding the way you want it. No one lens will tell the whole story, and we’re not going to try. But each lens will highlight a specific set of conflicts that can play out in economic behavior. In your own stories, you can focus on a single lens that clarifies the conflict you want to write about, or layer several lenses on top of each other if you’re feeling ambitious.

(This is similar to how we discussed empires in a previous post.)

We begin with the most fundamental level of economic analysis: energy.

(The following is largely based off of ecologist Joseph Tainter’s massively useful book The Collapse of Complex Societies. It also takes some from Lewis Mumford’s Technics and Civilization.)

By “energy,” I don’t just mean electricity or oil, although these are important. “Energy” includes any accessible way to turn a resource into work. The most fundamental energy source is food. If we don’t eat, we die. So, much of our activity is organized around producing calories and other nutrients that we can then consume. We invest the energy source of human labor and transform it into calories, which then are turned into more human labor to produce more calories.

Let’s say that it takes a full day’s work for a man to get enough food to feed himself. If so, the man would be in a desperate state: no clothing, no shelter, no leisure activities other than collapsing at the end of the day in total exhaustion. All activity would be directed toward getting food. A group of people in such a state would have a low level of culture, hardly worthy of the term.

Now, suppose that this group developed some way to get food more efficiently. It could be a new division of labor between male hunters and female foragers that raises the productivity of each; it could be finding a new, energy-dense food like tree nuts or buffalo. In either case, suddenly the group has a new surplus of food production. People have a few hours in their day to do something other than produce food. Or, the work of one person can now feed more than one person; so not everyone needs to gather food, and some people can devote their time to other kinds of work.

Note that the availability of an energy surplus presents options for how to benefit from it. Perhaps everyone gets to work a little less hard, but then devotes the rest of their time to leisure. The society that results would have about the same low level of material wealth, but might develop a rich culture of games and storytelling. Perhaps everyone spends less time gathering food, but they also develop different arts and crafts with the rest of their time; people might make better clothing and live in more comfortable shelters, and accumulate various prestige goods. Perhaps most people keep gathering food as before, but the surplus food goes to feed a small class of artisans who do useful work for the group: blacksmiths, potters, tanners. And perhaps another class of functionaries who do rather less work: chiefs, priests, poets, or professional warriors.

The development of a group and its culture depends on the availability of an energy surplus, its source, and its size. Possibilities for cultural development are very different if the average person works 12 hours a day to produce enough food for everyone, compared to 11 hours, or 3. How a culture responds to the availability of an energy surplus will dramatically influence its future development. Perhaps everyone will benefit, or perhaps some people will benefit from the surplus and others will work as before. And the manner in which they work and benefit could vary widely.

But back to the source of the surplus. A surplus can be generated in three main ways:

  • exploiting a new energy source;
  • using existing energy sources more efficiently or productively; or
  • allocating the surplus unequally between persons.

Suppose a farmer is working a small farm with hand tools. It’s grueling work and long. But then she gets the idea of yoking a donkey to a plow. Suddenly, she controls a new source of energy than just human labor: animal labor. The animal can do a lot of the work, and the farmer needs to work less hard, or can produce more food. And the animal eats food that people would not. The energy surplus grows.

Then, benefiting from the strength of her donkey, the farmer develops a new and heavier plow that can produce more food with the same effort. The energy surplus grows again.

Then she realizes that if animals can be made to work for a larger energy surplus, so can people. Slavery is born: slaves are made to work for more of their day than their owners would have, and the surplus is captured by the owners. The benefits of the energy surplus are divided unevenly. It gets even worse if the slaves are fed less than free people would eat; the energy surplus grows and the slavers benefit, but the slaves may waste away and die. The slavers would have to capture new slaves, perhaps by raiding other groups, perhaps by enslaving unfortunates within their own group.

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For most of human history, the main energy inputs were human labor and animal labor. Firewood too; the chemical energy from fire was used in cooking food and keeping us warm, and later for other things as well. The invention of the sail turned wind into an important energy source, which made ocean transport much easier. But then the gear was invented: suddenly, kinetic energy from other sources could be transformed into useful work. The windmill and watermill were able to replace labor that was previously done by animals. Then came the steam engine, and suddenly coal became a useful energy source. Then the combustion engine and the battery, then nuclear power, and so on. Each new energy source brought benefits with it, but also brought political changes—in part because the people who controlled that energy were different.

In our time, the computer has revolutionized all of society. In this model it is not a new energy source, but allows us to use existing energy sources more productively. It also changes the allocation of our energy surplus, as unskilled labor becomes displaced and technical expertise becomes massively more productive than at any previous time in human history. The rise of robotics is already having similar effects, and those effects will grow as robots replace more and more human labor. We now must ask what we will do, as a society, with all the available human capacity that is no longer needed for its former employment.

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This discussion was quite brief, but you can already see how it provides a powerful way to think of economic conflict in your stories. We can add another layer and ask what happens when energy surpluses suddenly shrink. Suddenly, societal arrangements that worked with a given level of energy become unsustainable. If you want to know what happens next, check out Tainter’s book. (The title is a spoiler, though!)

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(This post is part of Politics for Worldbuilders, an occasional series. Many of the previous posts in this series eventually became grist for my handbook for authors and game designers, Beyond Kings and Princesses: Governments for Worldbuilders. The topic of this post belongs in the planned second book in this series, working title Tyranny for Worldbuilders. No idea when it will be finished, but it should be fun!)