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Peak Capital: Money Hits the Limits to Growth

When it was originally published in 1972, Limits to Growth was a landmark comprehensive wholistic look at the problems of unsustainable growth on a planet with finite resources. The five main elements of the World Model are interconnected (agriculture, pollution, population, capital investments, and natural resources). Since, for example, the economy isn’t separate from natural resources—quite the opposite, in fact—they cannot be considered separate problems in their own little bubbles, requiring myopic solutions. When one element is in trouble, the whole system is in trouble.

Writing in The Oil Drum, Ugo Bardi explains the next hurdle facing humanity: peak capital.

The world’ global positioning system (GPS) is in trouble. The US government accountability office (GAO) has published a worrysome report on the situation. The GPS satellites are wearing down and, if no new investments are made, the accuracy of the positioning system will be reduced. Eventually, the whole system may cease functioning.

What’s happening here? The GPS system is a pinnacle of modern technology, a demonstration that the thing we call “progress” exists. If you have a car navigator, the idea of going back to clumsy printed maps just seems impossible. And that is just one of the many uses of the GPS system. How come that we left such an important system degrade? How can it be that someone forgot that satellites need to be replaced after a while?

The degradation of the GPS system may be attributed to mistakes, incompetence, bureaucracy or even conspiracies. But the problem may lie at a much deeper level. It may be a symptom of the degradation of the whole economy. But why is this happening? People mention evil banking practices, speculation, subprimes, terrorism, and what you have. But, with so many things going on at the same time, what is really the origin of the problems and what is just a consequence of other factors? To find an answer, you need to understand how the world’s economic system works. One of the first attempts to do that in a comprehensive way was the 1972 report to the Club of Rome known as “The Limits to Growth” (LTG).

The LTG study was based on a rather complex model which, however, can be summarized in terms of five main elements, as you see in the figure at the beginning of this post. The five elements are 1) population, 2) mineral resources, 3) agricultural resources, 4) pollution and 5) capital investments. This is just one of the many ways to build such a model. Other choices are possible, but the LTG model, improved over the years, is a good way to capture the essential elements of the world’s economy. Despite the persistent legend that the LTG study was “wrong”; the results of the study have been found to be remarkably accurate

None of the five elements of the model is a problem in itself. But each one can become a problem. In that case, we speak of 1) overpopulation, 2) mineral depletion, 3) famine, 4) ecosystem collapse and 5) economic decline. Often, these five problems are considered as if they were independent from each other. People tend to attribute all what is going on to a single problem: peak oil, climate change, overpopulation, and so on. In particular, economists tend to see the economy as independent from the availability of natural resources. Of course, this cannot be true and in a “dynamic” model, such as the LTG one, all the elements of the economic system interact with each other; either reinforcing each other (positive feedback) or weakening each other (negative feedback). To understand how the economy behaves as the natural resources are exploited (and overexploited) it is important to consider the role of the “capital” parameter. The behavior of the capital stock directly affects industrial production and other parameters which are counted as part of economic indicators such as the gross domestic product (GDP).

In the LTG world model, “capital” is created by investments generated by industrial activity. Capital is assumed to decay at a rate proportional to the amount of existing capital. This is called obsolescence or, sometimes, depreciation. To keep capital growing, or at least not disappearing, investments need to be larger than, or as large as, depreciation. Since investments depend on the availability of natural resources, the buildup (or the dissipation) of the capital stock depend on the progressive depletion of these resources. In the original LTG model of 1972, there were three kinds of capital stocks considered: industrial capital (factories, machines, etc.), service capital (schools, bridges, hospitals, etc.) and agricultural capital (farms, land, machinery, etc.). In the latest version (2004), industrial capital and mining capital are considered separately, as you see in the following figure ( from the synopsis of the 30 year update of LTG). Note how the “capital” parameter (in its various forms) affects the parameters which determine the GDP.

Read the whole article here.


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