Something New under the Sun: An Environmental History of the Twentieth-Century World

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In the course of the twentieth century the human race, without intending anything of the sort, has undertaken a giant, uncontrolled experiment on the earth. In time, according to J. R. McNeill in his startling new book, the environmental dimension of twentieth-century history will overshadow the importance of events like the world wars, the rise and fall of communism, and the spread of mass literacy. Contrary to the wisdom of Ecclesiastes that "there is nothing new under the sun," McNeill sets out to show that ...
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Overview

In the course of the twentieth century the human race, without intending anything of the sort, has undertaken a giant, uncontrolled experiment on the earth. In time, according to J. R. McNeill in his startling new book, the environmental dimension of twentieth-century history will overshadow the importance of events like the world wars, the rise and fall of communism, and the spread of mass literacy. Contrary to the wisdom of Ecclesiastes that "there is nothing new under the sun," McNeill sets out to show that the massive change we have wrought in our physical world has indeed created something new. To a degree unprecedented in human history, we have refashioned the earth's air, water, and soil, and the biosphere of which we are a part." "McNeill's work is a fruitful compound of history and science. McNeill infuses a substrate of ecology with a lively historical sensibility to the significance of politics, international relations, technological change, and great events. He charts and explores the breathtaking ways in which we have changed the natural world with a keen eye for character and a refreshing respect for the unforeseen in history.
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Editorial Reviews

Library Journal
McNeill (history, Georgetown Univ.) offers a concise synthesis of humanity's relationship to and alteration of the environment during the 20th century. Divided into 12 chapters, each with a brief introduction and summary of the topics discussed therein, his volume examines Earth's lithosphere, pedosphere, atmosphere, hydrosphere, and biosphere. McNeill interprets the human impact on the earth politically, economically, and socially, noting that history and ecology cannot be separated, as each influenced the other. Whether it be defoliants used to fight a war in Vietnam, the construction of military-industrial complexes, or the production and consumption of consumer goods, the environmental damage was severe but not always irreversible. As a history of causes and consequences, McNeill's volume will be a welcome addition to environmental history collections and will appeal to the general reader who wants a quick overview.--Patricia Ann Owens, Wabash Valley Coll., Mt. Carmel, IL Copyright 2000 Cahners Business Information.\
Booknews
In contrast to Anna Bramwell's (Yale UP, 1989), which dealt primarily with a history of environmentalists' ideas, activities, and organizations, McNeill's history is of the human changes perpetrated on the planet, changes during what was arguably the earth's Worst Century (so far). McNeill (history, Georgetown U.) maintains that the heretofore very adaptable human species has worked itself into behaviors narrowly adapted to an abundance of cheap resources (power, water), behaviors unadaptable to conditions of nonabundance, which it would seem from the provided examples, are already here. His history is anthropocentric in that he is interested in the changes wrought upon the earth (earth, air, water, biota) because of habitation, events like Indonesian deforestation, air pollution in London, acid rain in Germany. Contra Ecclesiastes' nothing new under the sun, McNeill attempts to prove pervasive anthropogenic changes are new and worth pondering. At the same time he attempts to avoid convincing the reader such changes are good or bad and to keep sermonizing to a minimum, hoping his ideas will reach a wide (educated) readership. Annotation c. Book News, Inc., Portland, OR (booknews.com)
Economist
John McNeill's Something New Under the Sun can fairly be described as learned, a rare thing for books about the environment. And, the author's strong opinions not withstanding, it is admirably objective.
Karen Pennar
...in a sweeping but highly accessible survey, McNeill pulls together disparate accounts and data on everything from soil erosion to the hydrological experiments of giant dam construction. He delivers nothing less than a history of the entire biosphere, giving a view that's rich in both anecdotes and data...McNeill had done a great service to current environmental debates by reviewing the recent past.
Business Week
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Product Details

  • ISBN-13: 9780393049176
  • Publisher: Norton, W. W. & Company, Inc.
  • Publication date: 4/28/2000
  • Edition description: 1 ED
  • Pages: 416
  • Product dimensions: 6.59 (w) x 9.58 (h) x 1.40 (d)

Read an Excerpt




Chapter One


Prologue: Peculiarities of a Prodigal Century


The disadvantage of men not knowing the past is that they do not know the present.
—G. K. Chesterton (1933)


Environmental change on earth is as old as the planet itself, about 4 billion years. Our genus, Homo, has altered earthly environments throughout our career, about 4 million years. But there has never been anything like the twentieth century.

    Asteroids and volcanoes, among other astronomical and geological forces, have probably produced more radical environmental changes than we have yet witnessed in our time. But humanity has not. This is the first time in human history that we have altered ecosystems with such intensity, on such scale and with such speed. It is one of the few times in the earth's history to see changes of this scope and pace. Albert Einstein famously refused to "believe that God plays dice with the world." But in the twentieth century, humankind has begun to play dice with the planet, without knowing all the rules of the game.

    The human race, without intending anything of the sort, has undertaken a gigantic uncontrolled experiment on the earth. In time, I think, this will appear as the most important aspect of twentieth-century history, more so than World War II, the communist enterprise, the rise of mass literacy, the spread of democracy, or the growing emancipation of women. To see just how prodigal and peculiar this century was, it helps to adopt long perspectives of the deeper past.

    In environmentalhistory, the twentieth century qualifies as a peculiar century because of the screeching acceleration of so many processes that bring ecological change. Most of these processes are not new: we have cut timber, mined ores, generated wastes, grown crops, and hunted animals for a long time. In modern times we have generally done more of these things than ever before, and since 1945, in most cases, far more. Although there are a few kinds of environmental change that are genuinely new in the twentieth century, such as human-induced thinning of the ozone layer, for the most part the ecological peculiarity of the twentieth century is a matter of scale and intensity.

    Sometimes differences in quantity can become differences in quality. So it was with twentieth-century environmental change. The scale and intensity of changes were so great that matters that for millennia were local concerns became global. One example is air pollution. Since people first harnessed fire half a million years ago, they have polluted air locally. Mediterranean lead smelting in Roman times even polluted air in the Arctic. But lately, air pollution has grown so comprehensive and large-scale that it affects the fundamentals of global atmospheric chemistry (see Chapter 3). So changes in scale can lead to changes in condition.

    Beyond that, in natural systems as in human affairs, there are thresholds and so-called nonlinear effects. In the 1930s, Adolf Hitler's Germany acquired Austria, the Sudetenland, and the rest of Czechoslovakia without provoking much practical response. When in September 1939 Hitler tried to add Poland, he got a six-year war that ruined him, his movement, and (temporarily) Germany. Unknowingly—although he was aware of the risk—he crossed a threshold and provoked a nonlinear effect. Similarly, water temperature in the tropical Atlantic can grow warmer and warmer without generating any hurricanes. But once that water passes 26° Celsius, it begins to promote hurricanes: a threshold passed, a switch thrown, simply by an incremental increase. The environmental history of the twentieth century is different from that of time past not merely because ecological changes were greater and faster, but also because increased intensities threw some switches. For example, incremental increases in fishing effort brought total collapse in some oceanic fisheries. The cumulation of many increased intensities may throw some grand switches, producing very basic changes on the earth. No one knows, and no one will know until it starts to happen—if then.


This chapter examines the long-term histories of some of the human actions that change environments. The length of the long term varies from case to case, mainly because of differences in the availability of information. The actions and processes in question are sometimes easily measured, sometimes not. The accuracy of the data is also open to question. Despite these problems, it is possible to make some judgments about how peculiar the last century was, and in what respects it departed sharply from the patterns of the past.


    Economic Growth since 1500


    Most of the things people do that change environments count as economic activity. Economists habitually measure the size of economies by summing the total value of goods and services brought to market or otherwise officially noted. The addition yields a single figure, the gross domestic product, or GDP. This is a very imperfect procedure, especially for times and places where significant production (and delivery of services) take place outside of markets. Economic historians are keenly aware of the drawbacks of this measurement, and have tried to adjust their figures accordingly.

    Five hundred years ago the world's annual GDP (converted into 1990 dollars) amounted to about $240 billion, slightly more than Poland's or Pakistan's today, slightly smaller than Taiwan's or Turkey's. Up to 1500 the world economy had grown extremely slowly over the millennia, mainly because (as we shall see) population had grown only slowly and improvements in productive technologies came very slowly by recent standards. After 1500, leading technologies were applied to the Americas and other regions, shipping became truly oceanic, and international trade grew. By 1820, the world's GDP had reached $695 billion (more than Canada's or Spain's, less than Brazil's in 1990s terms). The Industrial Revolution, further improvements in transport, and further development of frontier lands increased the rate of growth after 1820 so that in 1900, world GDP reached $1.98 trillion (less than 1990s Japan's). Indeed the period 1870 to 1913 remains one of spectacular growth spurts in the history of the world economy, faster than any that went before, and faster than much of what followed. After three decades of repressed growth (1914-1945) the world economy surged again, so that in 1950, world GDP attained $5.37 trillion (as large as the United States's economy in 1991). A long boom followed, based on more-open international trade, fast development of technology, and rapid population growth. By 1992, world GDP was about $28 trillion. This miraculous period of economic history, with all its upheaval, invention, organization, and suppression, is reduced to index numbers and growth rates in Table 1.1.


Table 1.1 Evolution of World GDP, 1500-1992

Date

1500
1820
1870
1900
1913
1929
1950
1973
1992

       World GDP(a)

100
290
470
823
1,136
1,540
2,238
6,693
11,664

Source: Maddison 1995:19, 227.

(a) GDP figures are given in index numbers relative to A.D. 1500.


    The world's economy in the late twentieth century was about l20 times larger than that of 1500. Most of this growth took place after 1820. The fastest growth came in 1950 to 1973, but the whole period since the World War II saw economic growth at rates entirely unprecedented in human experience.

    Most of this economic expansion was driven by world population growth. The rest is owing to more productive technologies and organization (and perhaps harder work). Per capita figures (Table 1.2) show that while the world economy has grown 120-fold since 1500, average income for individuals has grown only 9-fold. This of course is a global average, and disguises huge variations among regions, countries, and persons.


Table 1.2 Per Capita World GDP since 1500

Year

1500
1820
1900
1950
1992

       Per Capita World GDP
(1990 dollars)

565
651
1,263
2,138
5,145

       Index Numbers
(A.D. 1500 = 100)

100
117
224
378
942

Source: Elaborated from Maddison 1995:228.


    On average, we have nine times more income per capita than our ancestors had in 1500, and four times as much as our forebears had in 1900. Despite gross inequities in the distribution of this income growth—the average Mozambican today has an income well under half the global average of 1500—it must count as a great achievement of the human race over the past 500 years, and especially over the past century. The achievement has come at a price, of course. The social price, in the form of people enslaved, exploited, or killed so that "creative destruction" could make way for economic growth, is enormous. So is the environmental price. Historians in the past thirty years have appropriately paid great attention to the social price of economic growth and modernization; the environmental price deserves their attention too.


    Population Growth since 10,000 B.C.


    Population is much easier to measure than economic activity, so although estimates prior to 1900 must be treated with caution for most parts of the world, the following reconstruction is more reliable than the previous one.

    When humans first invented agriculture (around, say, 8000 B.C.), global population was probably between 2 and 20 million. We were outnumbered by some other primates, such as baboons. But with agriculture came the first great surge in human numbers. Population grew much faster, probably between 10 and 1,000 times as fast as before, but nonetheless very slowly, by tiny fractions of a percent per year. By A.D. l, the globe supported around 200 or 300 million people (roughly equivalent to today's Indonesia or United States). By 1500, world population had reached 400 or 500 million. It had taken about a millennium and a half to double, and grew at a rate well under 0.1 percent per year. After 1500, world population continued to grow quite slowly, reaching 700 million around 1730. At this point it began to rise more quickly, beginning the long boom still in progress today. By 1820, human population reached a billion or so. Our spectacular biological success since then is sketched by the figures in Table 1.3.


Table 1.3 World Population since 1820

Year

1820
1850
1900
1950
1990
2000

       Population (billion)

1
1.2
1.6
2.5
5.3
6.0

       Annual Growth Rate (%)


0.5 (1820-1849)
0.6 (1850-1899)
0.8 (1900-1949)
1.8 (1950-1989)
1.5 (1990-1999)

Source: Cohen 1995:79 and app. 2.


    Since the eighteenth century our numbers have grown extremely quickly by previous standards. And in the period since 1950, population has increased at roughly 10,000 times the pace that prevailed before the first invention of agriculture, and 50 to 100 times the pace that followed. If twentieth-century rates of population growth had prevailed since the invention of agriculture, the earth would now be encased in a squiggling mass of human flesh, thousands of light-years in diameter, expanding outward with a radial velocity many times greater than the speed of light. Clearly we will not keep the twentieth-century pace up for long. We are in the final stages of the second great surge in human population history. Demographers expect at most one more doubling to come. The twentieth century's global population history will be peculiar not only in light of the past, but in light of the future as well.

    Another way to conceive of the extraordinary demographic character of the modern era is to estimate how many people have ever lived, and (with estimates about life expectancy) how many human-years have ever been lived. Such estimates require extra caution, of course. Some European demographic historians have made the heroic assumptions and subsequent calculations. They figure that about 80 billion hominids have been born in the past 4 million years. All together, those 80 billion have lived about 2.16 trillion years. Now for the astonishing part: 28 percent of those years were lived after 1750, 20 percent after 1900, and 13 percent after 1950. Although the twentieth century accounts for only 0.00025 of human history (l00 out of 4 million years), it has hosted about a fifth of all human-years.

    Like the long-term course of economic growth, our population history also represents a triumph of the human species. It too, of course, has come at a price. In any case, it is an amazing development, an extreme departure from the patterns of the past—even though we tend to take our present experience for granted and regard modern rates of growth as normal. Bizarre events that last for more than a human lifetime are easy to misunderstand.

    The long-term trajectories of economic growth and population growth followed one another closely for millennia. Only around 1820 did they begin to diverge sharply, with economic growth outstripping population growth—hence the rising per capita incomes. What made this possible were new technologies and systems of economic organization that allowed people to make far greater use of energy.


    Energy History since 10,000 B.C.


    Before the Industrial Revolution began, we had at our disposal the muscle power of our bodies and of some domesticated animals; the power (very inefficiently harnessed) of wind and water; and (for heat but not for power) the chemical energy stored in wood and other biomass. The Industrial Revolution changed everything because it brought engines that could convert into mechanical power the biomass energy stocks accumulated in the earth's crust over hundreds of millions of years: fossil fuels.

    Physicists agree that the total quantity of energy in the universe is constant. On earth, energy is held in rough balance: what arrives from the sun as radiant energy is equivalent to what dissipates into space as heat. Energy can neither be created nor destroyed. Yet we commonly speak of energy production or consumption. The word "energy" is imprecise; the stuff hard to measure. The following reconstruction aims to be precise about what is meant by energy, but its quantitative elements deserve as much or more caution as the section on economic growth.

    All our energy, ultimately, is nuclear energy, in that it comes from a nuclear fusion reaction in the sun. It exists on earth in several forms, the important ones for people being mechanical (or kinetic), chemical, heat (or thermal), and radiant. The problem for us is to get energy in a useful form in the right place and the right time for whatever we might wish to do. We do this by means of converters, which change energy from one form to another, making it easier to store, transport, or use for work. Many economic operations make use of several converters. Each conversion involves some practical loss, in that a proportion of the preconverted energy is dissipated (usually as heat) or otherwise rendered into a form that is useless, impossible to capture. Hence converters have efficiency ratings. Human beings, for instance, are about 18 percent efficient: for every 100 calories I eat as food (chemical energy), only about 18 are converted into mechanical energy; the rest are lost for practical purposes, mostly as heat. Horses' efficiency is only about 10 percent.

    Before the Industrial Revolution, the only important converters were biological ones. The first human societies used only their own muscle power, derived from chemical energy stored in plants and animal flesh. Eventually, with a few tools, the deployment of this muscle power grew more efficient. The use of fire helped a great deal in heating, of course, and, when cooking was invented, rendered some otherwise inedible energy sources edible. But until roughly 10,000 years ago, for mechanical energy our ancestors depended on their own bodies in what one might call the "somatic energy regime."

    Agriculture allowed people greater control over the plant converters we call food crops. Shifting agriculture probably increased energy availability 10-fold over that available through hunting and gathering, and settled agriculture another 10-fold. This translated into greater population densities. Then, as big animals were domesticated, people acquired more muscle power, more mechanical energy, in more concentrated form. Oxen for haulage and horses or camels for transport marked great improvements. Oxen could plow heavy soils, opening up new food possibilities, which in turn allowed for more people and more oxen in a positive feedback loop that extended and strengthened the somatic energy regime. Societies that did not domesticate large animals labored at a disadvantage. New crops, wheels, and horse collars improved the energy efficiency of societies over subsequent millennia, but even at the outset of the Industrial Revolution in Europe (c.1800), more than 70 percent of the mechanical energy used was supplied by human muscle. The fundamental energy constraints remained the amount of arable land and the amount of water to produce crops.

    Agriculture and animal domestication did create an energy surplus. Controlling that surplus, applying it as one wished, and enjoying the returns from it constituted the stuff of politics—directing the somatic energy regime. If applied judiciously, in war or irrigation for instance, surplus might create a windfall of increasing returns that made someone rich or powerful indeed—pharaohs, for instance. Since people are more efficient than horses and far better than oxen as converters of chemical into mechanical energy, big domesticated animals were something of a luxury in preindustrial times. Slavery was the most efficient means by which the ambitious and powerful could become richer and more powerful. It was the answer to energy shortage. Slavery was widespread within the somatic energy regime, notably in those societies short on draft animals. They had no practical options for concentrating energy other than amassing human bodies.

    An interesting feature of the somatic energy regime was its success in storing energy. In the form of heat or light or even electricity, energy is hard to store. Wind and direct solar power remain hard to store even with late twentieth-century technologies. Chemical energy in the form of plants is also hard to store, although with favorable conditions and appropriate techniques some crops can be stored for a few years, albeit with considerable wastage.

    The vagaries of weather and crop pests caused the supply of food to vary greatly from season to season and year to year in preindustrial societies. This created a problem for society as a whole, and for its rulers, in that the available energy supply fluctuated uncontrollably and unpredictably over time. For rulers, the stock of human and domestic animal populations served as an energy store, a flywheel in the society's energy system. They could be put to work whether the primary energy source—plant crops—was bountiful or scarce. The stock could be built up in fat times and drawn down in lean times, but at virtually all times rulers could lay their hands on people and animals for their enterprises.

    For ordinary people, livestock served the same purpose. They were a store of energy, one that could be raided when necessary to even out energy flows despite the inevitably uneven supply of staple foods. This provided households a flywheel in their domestic energy systems, proportional in size to the quantity of animals they owned (or could buy when needed).

    The limits of the somatic energy regime were stringent. In a burst of effort, the human body can muster 100 watts of power. The most any society could devote to a given task, say ditch digging, dam building, or fighting, was—with people and animals as the main sources of mechanical power—a few hundred thousand watts. The Ming emperors and Egyptian pharaohs had no more power available to them than does a single modern bulldozer operator or tank captain. Expanding their territorial domain might increase rulers' total energy supply, a goal vigorously pursued, but it could not raise the total that they could apply to a single task since it was usually impossible to concentrate more than a few thousand bodies on a given construction project or battle.

    The Industrial Revolution first augmented and then quickly outstripped human muscle power. Wherever it spread, it ended the somatic energy regime, replacing it with a much more complex set of arrangements that one might call the "exosomatic energy regime," but might better be called the fossil fuel age: to date the lion's share of energy deployed since 1800 has come from fossil fuels.

    From ancient times forward, notably in Persia, China, and Europe, sails, windmills, and watermills added slightly to the somatic energy supply of agrarian societies. Incremental improvements followed for many centuries. But in the eighteenth century, steam engines tapped hundreds of millions of years' worth of photosynthesis, burning coal to convert chemical into mechanical energy. Coal of course had found uses for centuries, mainly as a fuel for heating. But the steam engine's capacity to convert that heat into mechanical energy capable of doing work opened up new possibilities.

    The first steam engines were notoriously inefficient, losing more than 99 percent of their energy. But gradual improvements by 1800 allowed efficiency of about 5 percent and a capacity of 20 kilowatts of power in a single engine, the equivalent of 200 men. By 1900, engineers had learned how to handle high-pressure steam, and engines became 30 times as powerful as those of 1800. On top of this, steam engines, unlike watermills and windmills, could be put anywhere, even on ships and railroad locomotives. This created another positive feedback loop, in that it allowed transport of coal on a massive scale, providing the fuel for yet more steam engines. Nineteenth-century industrialization rested on this fact. World coal production, about 10 million tons in 1800, shot up 110-fold by 1900.

    By 1900 another major departure was underway: internal combustion engines using refined oil. A Scot, James Young, figured out how to refine crude oil in the 1850s, and an American, Edwin Drake, proved in 1859 that oil could be drilled through deep rock. The oil age had begun, albeit in a small way. Internal combustion engines, developed mainly in Germany after 1880, furthered the transition. They weighed less than coalfired steam engines, they were much more efficient, especially at small scales. On larger scales they could deliver much more power than steam engines. The provision of electricity needed power on such a scale; and automobiles required lightweight and efficient engines.

    So from 1900 forward, biomass, coal, and oil provided large quantities of energy. In terms of usable energy, fossil fuels overshadowed biomass from the 1890s forward, even though the great majority of the world's population used no fossil fuels directly. Production and use of all three fuels grew throughout the twentieth century, although oil use grew much faster so that in proportional terms the other two declined. Some estimates of world fuel production and the usable energy derived therefrom appear in Tables 1.4 and 1.5. Not only did fossil fuels largely replaced biomass in the global energy mix in the twentieth century, but the total energy harvest skyrocketed. The electrification of the globe, begun around 1890 and still in train, boosted demand and use of energy. Electric motors are highly flexible and have countless uses. Electricity also is good at providing light and heat. Lenin famously defined communism as electrification plus Soviet power, and rural electrification was a major achievement of Franklin Roosevelt's presidency.


Table 1.4 World Fuel Production, 1800-1990

    Production (millions of metric tons)
Type of Fuel

Biomass
Coal
Oil

       1800

1,000
10
10

       1900

1,400
1,000
20

       1990

1,800
5,000
3,000

Source: Elaborated From Smil 1994:185-7.

Note: These figures do not reflected the energy yield of these fuels: a ton of oil gives 5-10 times as much energy as a ton firewood, and perhaps twice as much as a tone of coal.


    The worldwide energy harvest increased about fivefold in the nineteenth century under the impact of steam and coal, but then by another sixteenfold in the twentieth century with oil, and (after 1950) natural gas, and, less importantly, nuclear power. No other century—no millennium—in human history can compare with the twentieth for its growth in energy use. We have probably deployed more energy since 1900 than in all of human history before 1900. My very rough calculation suggests that the world in the twentieth century used 10 times as much energy as in the thousand years before 1900 A.D. In the 100 centuries between the dawn of agriculture and 1900, people used only about two-thirds as much energy as in the twentieth century.


Table 1.5 World Energy Use, 1800-1990

  1800 1900 1990
Total (millions of metric tons of oil equivalent) 400 1,900 30,000
Indexed (1900 = 100) 21 100 1,580

Source: Elaborated from Smil 1994:187.


    This astounding profligacy, too, counts as something of a triumph for the human species, a liberation from the drudgery of endless muscular toil and the opening up of new possibilities well beyond the range of muscles. Even on a per capita basis energy use grew spectacularly, four- or fivefold in the twentieth century. In the 1990s the average global citizen (an abstraction of limited utility) deployed about 20 "energy slaves," meaning 20 human equivalents working 24 hours a day, 365 days a year. The economic growth of the last two centuries, and the population growth too, would have been quite impossible within the confines of the somatic energy regime.

    This energy intensification came at a cost. Here I mention two aspects of that cost. First, fossil fuel combustion generates pollution. So does, and always has, biomass burning. But because fossil fuels have more applications, their development has meant far more combustion in total, and far more pollution. Chapters 3 and 4 will address this theme. Secondly, fossil fuel use has sharply increased the inequalities in wealth and power among different parts of the world. The requisite technologies and corresponding social and political structures developed first and most thoroughly in Europe and North America. Other parts of the world generally remained dependent on biomass for heat and muscles for mechanical energy until 1950 or so. Indeed, the poorest countries remain so still. The average American in the 1990s used 50 to 100 times as much energy as the average Bangladeshi and directed upwards of 75 energy slaves while the Bangladeshi had less than one. Harnessing fossil fuels played a central (though not exclusive) role in widening the international wealth and power differential so conspicuous in modern history. This is a good thing if one prefers to see some people comfortable instead of almost all locked in poverty, but it is a bad thing if one prefers equality. In any case, inequality in energy use peaked in the 1960s. Thereafter the transition to intensive energy use spread around the world.

    The exhaustion of fossil fuels on the global scale is not imminent. Predictions of dearth have proved false since the 1860s. Indeed, quantities of proven reserves of coal, oil, and natural gas tended to grow faster than production in the twentieth century. Current predictions, which will be revised, imply several decades before oil or gas should run out, and several centuries before coal might. We can continue to live off the accumulated geological capital of the eons for some time to come—if we can manage or accept the pollution caused by fossil fuels.


    Conclusion


    The human species has shattered the constraints and rough stability of the old economic, demographic, and energy regimes. This is what makes our times so peculiar. In the nineteenth century the world began a long economic boom, which climaxed in the twentieth century, when the world economy grew 14-fold. It expanded less than about fourfold in per capita terms, because world population multiplied fourfold in this century. Energy use embarked on a boom which began with a fivefold growth in the nineteenth century. That boom climaxed (to date) in the twentieth century with a further 16-fold expansion.

    Why has all this happened now? The main answer is human ingenuity. Part of the answer is luck. First the luck: in the eighteenth century a large part of the disease load that checked our numbers, and our productivity too, was lifted. Initially this had little to do with medicine or public health measures, but reflected a gradual adjustment between human hosts and some of our pathogens and parasites. We domesticated or marginalized some of our killer diseases, quite unintentionally. This was luck. So was the ending of the Little Ice Age (c.1550-1850), which may also have had a minor role in permitting the great modern expansions.

    Most of the explosive growth of modern times derives from human ingenuity. From the 1760s forward we have continually devised clusters of new technologies, giving access to new forms of energy and enhancing labor productivity. At the same time we have designed new forms of social and business organization that have helped ratchet up the pace of economic activity. Both machines and organization—hardware and software—lie behind the breakthrough of modern times.

    The great modern expansion, while liberating in a fundamental sense, brought disruption with it. The surges in population, production, and energy use affected different regions, nations, classes, and social groups quite unevenly, favoring some and hurting others. Many inequalities widened, and perhaps more wrenching, fortune and misfortune often were reshuffled. Intellectually, politically, and in every other way, adjusting to a world of rapid growth and shifting status was hard to do. Turmoil of every sort abounded. The preferred policy solution after 1950 was yet faster economic growth and rising living standards: if we can all consume more than we used to, and expect to consume still more in the years to come, it is far easier to accept the anxieties of constant change and the inequalities of the moment. Indeed, we erected new politics, new ideologies, and new institutions predicated on continuous growth. Should this age of exuberance end, or even taper off, we will face another set of wrenching adjustments.


The twentieth century would appear equally unusual if one charted the long-term history of freshwater use, timber use, minerals use, or industrial output. All of these boomed after 1900. So did the generation of solid waste and of air and water pollution. Countless indicators of, and causes behind, environmental change would show much the same extraordinary story. The following pages will explore these stories, not from the perspective of the long term, but within the prodigal century itself.

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Table of Contents

List of Maps and Tables
Foreword
Acknowledgments
Preface
1 Prologue: Peculiarities of a Prodigal Century 3
2 The Lithosphere and Pedosphere: The Crust of the Earth 21
3 The Atmosphere: Urban History 50
4 The Atmosphere: Regional and Global History 84
5 The Hydrosphere: The History of Water Use and Water Pollution 118
6 The Hydrosphere: Depletions, Dams, and Diversions 149
7 The Biosphere: Eat and Be Eaten 192
8 The Biosphere: Forests, Fish, and Invasions 228
9 More People, Bigger Cities 269
10 Fuels, Tools, and Economics 296
11 Ideas and Politics 325
12 Epilogue: So What? 357
Bibliography 363
Credits 405
Index 407
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  • Anonymous

    Posted January 20, 2001

    Comprehensive, imaginative survey of environmental history of the world

    This is a remarkable book for its level of detail, imaginative analysis, and straightforward presentation. It is also a very important book. [NEW PARAGRAPH] Repeatedly, I found myself reading McNeill's footnotes and considering the vast amount of research that McNeill performed prior to writing this book. [NEW PARAGRAPH] This book is very readable. Each sentence delivers a new piece of information. McNeill never bogs down in any single area, and his brisk pacing facilitates the presentation of his material. [NEW PARAGRAPH] Good, succinct writing allows McNeill to cover plenty of material in 362 pages of text. I can only think of one topic that McNeill neglected: the risks to water posed by cryptosporidium, giardia, and pfisteria. [NEW PARAGRAPH] McNeill's intellectual integrity is prominent throughout the book. He consistently resists the temptation to force correlations. His analyses of population growth and the Green Revolution in agriculture, for example, are sensitive and faithful to the data, even where they may not establish environmental degradation. [NEW PARAGRAPH] My favorite moment is at pages 265-66. Taking the long-term perspective, as McNeill typically does in the book, he likens humanity in our post-1820 high-energy phase to the cyanobacteria of 2 billion years ago. These predecessors to blue-green algae have, like us, 'pioneered new metabolic paths . . . and refashioned the world in the process'--in their case, by using hydrogen from water and excreting oxygen, so as to raise the oxygen concentration in the air from one part per trillion to 20 percent. Explaining that this process 'conveniently' poisoned most other bacteria, to which oxygen was toxic, McNeill observes that the cyanobacteria thus made more room for itself and other oxygen-tolerant creatures. Showing customary restraint, McNeill leaves it to the reader to recall our place among such creatures. Noting that humans have used more than oxygen poisoning to transform the biosphere, McNeill cautions that we have not chosen the characteristics of the transformed biosphere, 'as we are scarcely more conscious of the process than were cyanobacteria.' [NEW PARAGRAPH] This is McNeill's theme, and it is repeated in the closing lines of the book. He ends on a cautiously optimistic note. If we collect and analyze the data, we can consciously choose a sustainable world, rather than merely cross our fingers. By doing so, we would then distinguish ourselves from the cyanobacteria.

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  • Anonymous

    Posted January 23, 2001

    Winner of 2001 World History Association Book Award

    The Book Award Committee is pleased to announce that this book is co-winner of its 2001 prize, along with Ken Pomeranz' The Great Divergence: China, Europe, and the Making of the Modern World Economy. Jurors praised both books with words like brilliant, superb, tour de force, and 'a classic.' Congratulations for an outstanding contribution to 'history from a global perspective' in the field of the environment. The prize will be presented at the June meeting of the WHA in Salt Lake City.

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