In When Giants Fall, I highlighted remarks by the Financial Times' chief economics commentator about what I and others see as a key driver of prosperity:
According to Martin Wolf, cheap and abundant energy has played a major role over the past two centuries in creating a “positive-sum world economy,” where everybody “can become better off.” This, he believes, “is why democracy has become a political norm, empires have largely vanished, legal slavery and serfdom have disappeared, and measures of well-being have risen almost everywhere....Consistent rises in real incomes per head have transformed our economic lives,” Wolf added, but they have also “transformed politics.”
By the same token, he writes, “a zero-sum economy leads, inevitably, to repression at home and plunder abroad. In traditional agrarian societies the surpluses extracted from the vast majority of peasants supported the relatively luxurious lifestyles of military, bureaucratic, and noble elites. The only way to increase the prosperity of an entire people was to steal from another one....In a world of stagnant living standards the gains of one group came at the expense of equal, if not still bigger, losses for others. This, then, was a world of savage repression and brutal predation”—and of empire building and war.
For Wolf, “the biggest point about debates on climate change and energy supply is that they bring back the question of limits....If there are limits to emissions, there may also be limits to growth. But if there are indeed limits to growth, the political underpinnings of our world fall apart. Intense distributional conflicts must then re-emerge—indeed, they are already emerging—within and among countries.” In such an environment, it is only natural that the prospective and, to some great extent, hypothetical gains from greater integration with nations that are competing for a share of a shrinking pie are called into question. Rather, the natural tendency will be toward protectionism, isolationism, xenophobia, and conflict.
As it happens, a recent article in the American Institute of Biological Sciences peer-reviewed journal, BioScience, "Study Finds Energy Limits Global Economic Growth," details the strong link between energy and economic activity.
A study that relates global energy use to economic growth, published in the January issue of BioScience, finds strong correlations between these two measures both among countries and within countries over time. The research leads the study's authors to infer that energy use limits economic activity directly. They conclude that an "enormous" increase in energy supply will be required to meet the demands of projected world population growth and lift the developing world out of poverty without jeopardizing standards of living in most developed countries.
The study, which used a macroecological approach, was based on data from the International Energy Agency and the World Resources Institute. It was conducted by a team of ecologists led by James H. Brown of the University of New Mexico. The team found the same sort of relationship between energy consumption per person and gross domestic product per person as is found between metabolism and body weight in animals. Brown's group suggests the similarity is real: Cities and countries, like animals, have metabolisms that must burn fuel to sustain themselves and grow. This analogy, together with the data and theory, persuades the BioScience authors that the linkage between energy use and economic activity is causal, although other factors must also be in play to explain the variability in the data.
The study goes on to show that variables relating to standard of living, such as the proportion of doctors in a population, the number of televisions per person, and infant mortality rate, are also correlated with both energy consumption per person and gross domestic product per person. These correlations lead the authors to their conclusions about the increases in energy production necessary to sustain a still-growing world population without drops in living standards. To support the expected world population in 2050 in the current US lifestyle would require 16 times the current global energy use, for example. Noting that 85 percent of humankind's energy now comes from fossil fuels, the BioScience authors point out that efforts to develop alternative energy sources face economic problems of diminishing returns, and reject the view of many economists that technological innovation can circumvent resource shortages.
Click here to read the full article (in PDF form).
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