Economic growth: How it works; how it fails; why wealth disparity occurs

Economists have put together models of how an economy works, but these models were developed years ago, when the world economy was far from limits. These models may have been reasonably adequate when they were developed, but there is increasing evidence that they don’t work in an economy that is reaching limits. For example, my most recent post, “Why ‘supply and demand’ doesn’t work for oil,” showed that when the world is facing the rising cost of oil extraction, “supply and demand” doesn’t work in the expected way.

In order to figure out what really does happen, we need to consider findings from a variety of different fields, including biology, physics, systems analysis, finance, and the study of past economic collapses. Since I started studying the situation in 2005, I have had the privilege of meeting many people who work in areas related to this problem.

My own background is in mathematics and actuarial science. Actuarial projections, such as those that underlie pensions and long term care policies, are one place where historical assumptions are not likely to be accurate, if an economy is reaching limits. Because of this connection to actuarial work, I have a particular interest in the problem.

How Other Species Grow 

We know that other species don’t amass wealth in the way humans do. However, the number of plants or animals of a given type can grow, at least within a range. Techniques that seem to be helpful for increasing the number of a given species include:

  • Natural selection. With natural selection, all species have more offspring than needed to reproduce the parent. A species is able to continuously adapt to the changing environment because the best-adapted offspring tend to live.
  • Cooperation. Individual cells within an organism cooperate in terms of the functions they perform. Cooperation also occurs among members of the same species, and among different species (symbiosis, parasites, hosts). In some cases, division of labor may occur (for example, bees, other social insects).
  • Use of tools. Animals frequently use tools. Sometimes items such as rocks or logs are used directly. At other times, animals craft tools with their forepaws or beaks.

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