Five Axioms of Sustainability
Five Axioms of Sustainability
By Richard Heinberg /

My aim in this essay is to explore the history of the terms sustainable and sustainability, and their various published definitions, and then to offer a set of five axioms (based on a review of the literature) to help clarify the characteristics of a durable society.

The essence of the term sustainable is simple enough: “that which can be maintained over time.” By implication, this means that any society, or any aspect of a society, that is unsustainable cannot be maintained for long and will cease to function at some point.

It is probably safe to assume that no society can be maintained forever: astronomers assure us that in several billion years the Sun will have heated to the point that the oceans will have boiled away and life on our planet will have come to an end. Thus sustainability is a relative term. It seems reasonable to take as a temporal frame of reference the durations of prior civilizations, which ranged from several hundreds to several thousands of years. A sustainable society, then, would be one capable of maintaining itself for many centuries into the future.

However, the word sustainable has become widely used in recent years to refer, in a general and vague way, merely to practices that are reputed to be more environmentally sound than others. Often the word is used so carelessly as to lead some environmentalists to advise abandoning its use.1 Nevertheless, I believe that the concept of sustainability is essential to the understanding and solution of our species’ ecological dilemma, and that the word is capable of rehabilitation, if only we are willing to expend a little effort in arriving at a clear definition.

History and Background

The essential concept of sustainability was embodied in the worldviews and traditions of many indigenous peoples; for example, it was a precept of the Gayanashagowa, or Great Law of Peace (the constitution of the Haudenosaunee or Six Nations of the Iroquois Confederacy) that chiefs consider the impact of their decisions on the seventh generation to come.

The first known European use of sustainability (German: Nachhaltigkeit) occurred in 1712 in the book Sylvicultura Oeconomica by German forester and scientist Hannss Carl von Carlowitz. Later, French and English foresters adopted the practice of planting trees as a path to “sustained yield forestry.”

The term gained widespread usage after 1987, when the Brundtland Report of the World Commission of Environment and Development defined sustainable development as development that “meets the needs of the present generation without compromising the ability of future generations to meet their own needs.”2 This definition of sustainability has proven extremely influential, and is still widely used; nevertheless it has been criticized for its failure to explicitly note the unsustainability of the use of non-renewable resources, and for its general disregard of the problem of population growth.3

Also in the 1980s, Swedish oncologist Dr. Karl-Henrik Robèrt brought together leading Swedish scientists to develop a consensus on requirements for a sustainable society. In 1989 he formulated this consensus in four conditions for sustainability, which in turn became the basis for an organization, The Natural Step.4 Subsequently, 60 major Swedish corporations and 56 municipalities, as well as many businesses in other nations, pledged to abide by Natural Step conditions. The four conditions are as follows:

  1. In order for a society to be sustainable, nature’s functions and diversity are not systematically subject to increasing concentrations of substances extracted from the earth’s crust.
  2. In order for a society to be sustainable, nature’s functions and diversity are not systematically subject to increasing concentrations of substances produced by society.
  3. In order for a society to be sustainable, nature’s functions and diversity are not systematically impoverished by physical displacement, over-harvesting, or other forms of ecosystem manipulation.
  4. In a sustainable society, people are not subject to conditions that systematically undermine their capacity to meet their needs.

Seeing the need for an accounting or indicator scheme by which to measure sustainability, Canadian ecologist William Rees in 1992 introduced the concept of the Ecological Footprint, defined as the amount of land and water area a human population would hypothetically need in order to provide the resources required to support itself and to absorb its wastes, given prevailing technology.5 Implicit in the scheme is the recognition that, for humanity to achieve sustainability, the total world population’s footprint must be less than the total land/water area of the Earth (that footprint is currently calculated by the Footprint Network as being about 23 percent larger than what the planet can regenerate, indicating that humankind is to this extent operating in an unsustainable manner).

In a paper published in 1994 (revised 1998), professor of physics Albert A. Bartlett offered 17 Laws of Sustainability, with which he sought to clarify the meaning of sustainability in terms of population and resource consumption.6 Bartlett’s criticisms of the careless use of the term, and his rigorous demonstration of the implications of continued growth, were important influences on the present author’s efforts to define what is genuinely sustainable.

A truly comprehensive historical survey of the usage of the terms sustainable and sustainability is not feasible. A search of for sustainability (January 17, 2007) yielded nearly 25,000 hits—presumably indicating several thousand distinct titles containing the word. Sustainable yielded 62,000 hits, including books on sustainable leadership, communities, energy, design, construction, business, development, urban planning, tourism, and so on. A search of journal articles on Google Scholar turned up 538,000 hits, indicating thousands of scholarly articles or references with the word sustainability in their titles. However, my own admittedly less-than-exhaustive acquaintance with the literature (informed, among other sources, by two books that offer an overview of the history of the concept of sustainability)7 suggests that much, if not most of this immense body of publications repeats, or is based on, the various definitions and conditions described above.

Five Axioms

As a contribution to this ongoing refinement of the concept, I have formulated five axioms (self-evident truths) of sustainability. I have not introduced any fundamentally new notions in any of the axioms; my goal is simply to distill ideas that have been proposed and explored by others, and to put them into a form that is both more precise and easier to understand.

In formulating these axioms I endeavored to take into account previous definitions of sustainability, and also the most cogent criticisms of those definitions. My criteria were as follows:

  • To qualify as an axiom, a statement must be capable of being tested using the methodology of science;
  • Collectively, a set of axioms intended to define sustainability must be minimal (with no redundancies);
  • At the same time, the axioms must be sufficient, leaving no glaring loopholes; and
  • The axioms should be worded in terms the layperson can understand.

Here are the axioms, each followed by a brief Discussion:


1. (Tainter’s Axiom): Any society that continues to use critical resources unsustainably will collapse.

Exception: A society can avoid collapse by finding replacement resources.

Limit to the exception: In a finite world, the number of possible replacements is also finite.

Discussion: I have named this axiom for Joseph Tainter, author of the classic study, The Collapse of Complex Societies, which demonstrates that collapse is a frequent if not universal fate of complex societies, and argues that collapse is directly related to declining returns on efforts to support growing levels of societal complexity with energy harvested from the environment. Jared Diamond’s book Collapse: How Societies Choose to Fail or Succeed similarly makes the argument that collapse is the common destiny of societies that ignore resource constraints.9

This axiom defines sustainability by the consequences of its absence, i.e., collapse. Tainter defines collapse as a reduction in social complexity—i.e., a contraction of society in terms of its population size, the sophistication of its technologies, the consumption rates of its people, and the diversity of its specialized social roles. Often, historically, collapse has meant a precipitous decline in population brought about by social chaos, warfare, disease, or famine. However, collapse can also occur more gradually over a period of many decades or even several centuries. There is also the theoretical possibility that a society could choose to collapse (i.e., reduce its complexity) in a controlled as well as gradual manner.

While it could be argued that a society can choose to change rather than collapse, the only choices that would substantively affect the outcome would be either to cease using critical resources unsustainably or to find alternative resources.

A society that uses resources sustainably may collapse for other reasons, some beyond the society’s control (as a result of an overwhelming natural disaster, or of conquest by another, more militarily formidable and aggressive society, to name just two of many possibilities), so it cannot be said that a sustainable society is immune to collapse unless many more conditions for sustainability are specified. This first axiom focuses on resource consumption because that is a decisive, quantifiable, and, in principle, controllable determinant of a society’s long-term survival.

The question of what constitutes sustainable or unsustainable use of resources is addressed in axioms 3 and 4.

Critical resources are ones essential to the maintenance of life and basic social functions—including (but not necessarily limited to) water and the resources necessary to produce food and usable energy.

The Exception and Limit to the Exception address the common argument of free-market economists that resources are infinitely substitutable, and that therefore modern market-driven societies need never face a depletion-led collapse, even if their consumption rates continue to escalate.8 In some instances, substitutes for resources become readily available and are even superior, as was the case in the mid-19th century when kerosene from petroleum was substituted for whale oil as a fuel for lamps. In other cases, substitutes are inferior (as is the case with tar sands as a substitute for conventional petroleum, given that tar sands are less energy-dense, require more energy input for processing, and produce more carbon emissions). As time goes on, societies will tend first to exhaust substitutes that are superior and easy to get at, then those that are equivalent, and increasingly will have to rely on ever more inferior substitutes to replace depleting resources—unless rates of consumption are held in check (see Axioms 2–4).


2. (Bartlett’s Axiom): Population growth and/or growth in the rates of consumption of resources cannot be sustained.

Discussion: I have named this axiom for Albert A. Bartlett because it is his First Law of Sustainability, reproduced verbatim (I found it impossible to improve upon).10

The world has seen the human population grow for many decades and therefore this growth has obviously been sustained up to the present. How can we be sure that it cannot be sustained into the indefinite future? Simple arithmetic can be used to show that even small rates of growth, if continued, add up to absurdly large—and plainly unsupportable—population sizes and rates of consumption. For example: a simple one percent rate of growth in the present human population (less than the actual current rate) would result in a doubling of population each 70 years. Thus in 2075, the Earth would be home to 13 billion humans; in 2145, 26 billion; and so on. By the year 3050, there would be one human per square meter of Earth’s land surface (including mountains and deserts).


3. To be sustainable, the use of renewable resources must proceed at a rate that is less than or equal to the rate of natural replenishment.

Discussion: Renewable resources are exhaustible. Forests can be over-cut, resulting in barren landscapes and shortages of wood (as occurred in many parts of Europe in past centuries), and fish can be over-harvested, resulting in the extinction or near-extinction of many species (as is occurring today globally).

This axiom has been stated (in somewhat differing ways) by many economists and ecologists, and is the basis for “sustained yield forestry” (see above) and “maximum sustainable yield” fishery management. Efforts to refine this essential principle of sustainability are ongoing.11

The term “rate of natural replenishment” requires some discussion. The first clue that harvesting is proceeding at a rate greater than that of natural replenishment is the decline of the resource base. However, a resource may be declining for reasons other than over-harvesting; for example, a forest that is not being logged may be decimated by disease. Nevertheless, if the resource is declining, pursuit of the goal of sustainability requires that the rate of harvest be reduced, regardless of the cause of the resource decline. Sometimes harvests must drop dramatically, at a rate far greater than the rate of resource decline, so that the resource has time to recover. This has been the case with regard to commercial wild whale and fish species that have been over-harvested to the point of near-exhaustion, and have required complete harvest moratoria in order to re-establish themselves—though in cases where the remaining breeding population is too small even this is not enough and the species cannot recover.

Axiom 3 is implied in the Natural Step’s third condition.


4. To be sustainable, the use of non-renewable resources must proceed at a rate that is declining, and the rate of decline must be greater than or equal to the rate of depletion.

The rate of depletion is defined as the amount being extracted and used during a specified time interval (usually a year) as a percentage of the amount left to extract.

Discussion: No continuous rate of use of any non-renewable resource is sustainable. However, if the rate of use is declining at a rate greater than or equal to the rate of depletion, this can be said to be a sustainable situation in that society’s dependence on the resource will be reduced to insignificance before the resource is exhausted.

This principle was first stated, in a more generalized and more mathematically rigorous form, by Albert A. Bartlett in his 1986 paper, “Sustained Availability: A Management Program for Non-Renewable Resources.”12 The article’s abstract notes:

If the rate of extraction declines at a fixed fraction per unit time, the rate of extraction will approach zero, but the integrated total of the extracted resource between t=0 and t=infinity will remain finite. If we choose a rate of decline of the rate of extraction of the resource such that the integrated total of all future extraction equals the present size of the remaining resource then we have a program that will allow the resource to be available in declining amounts for use forever.

Annually reducing the rate of extraction of a given non-renewable resource by its yearly rate of depletion effectively accomplishes the same thing, but requires only simple arithmetic and layperson’s terms for its explanation.

Estimates of the “amount left to extract,” mentioned in the axiom, are disputable for all non-renewable resources. Unrealistically robust estimates would tend to skew the depletion rate in a downward direction, undermining any effort to attain sustainability via a resource depletion protocol. It may be realistic to assume that people in the future will find ways to extract non-renewable resources more thoroughly, with amounts that would otherwise be left in the ground becoming economically recoverable as a result of higher commodity prices and improvements in extraction technology. Also, exploration techniques are likely to improve, leading to further discoveries of the resource. Thus realistic estimates of ultimately recoverable quantities should be greater than currently known amounts extractable with current technology at current prices. However, it is unrealistic to assume that people in the future will ever be able to economically extract all of a given resource, or that limits of declining marginal returns in the extraction process will no longer apply. Moreover, if discovery rates are currently declining, it is probably unrealistic to assume that discovery rates will increase substantially in the future. Thus for any non-renewable resource prudence dictates adhering to conservative estimates of the “amount left to extract.”

Axiom 4 encapsulates Bartlett’s 7th and 8th Laws of Sustainability. It is also the basis for the Oil Depletion Protocol, first suggested by petroleum geologist Colin J. Campbell in 1996 and the subject of a recent book by the present author.13 The aim of the Oil Depletion Protocol is to reduce global consumption of petroleum in order to avert the crises likely to ensue as a result of declining supply—including economic collapse and resource wars. Under the terms of the Oil Depletion Protocol, oil-importing countries would reduce their imports by the world oil depletion rate (calculated by Campbell at 2.5 percent per year); producers would reduce their domestic production by their national depletion rates.


5. Sustainability requires that substances introduced into the environment from human activities be minimized and rendered harmless to biosphere functions.

In cases where pollution from the extraction and consumption of non-renewable resources that has proceeded at expanding rates for some time threatens the viability of ecosystems, reduction in the rates of extraction and consumption of those resources may need to occur at a rate greater than the rate of depletion.

Discussion: If axioms 2 through 4 are followed, pollution should be minimized as a result. Nevertheless, these conditions are not sufficient in all cases to avert potentially collapse-inducing impacts.

It is possible for a society to generate serious pollution from the unwise use of renewable resources (the use of tanning agents on hides damaged streams for centuries or millennia), and such impacts are to be avoided. Likewise, especially where large numbers of humans are concentrated, their biological wastes may pose severe environmental problems; such wastes must be properly composted.

The most serious forms of pollution in the modern world arise from the extraction, processing, and consumption of non-renewable resources. If (as outlined in Axiom 4) the consumption of non-renewable resources declines, pollution should also decline. Thus, in theory, if a society is following the terms of Axiom 4, these pollution problems are less likely to arise in the future.

However, in the current instance, where the extraction and consumption of non-renewable resources have been growing for some time and have resulted in levels of pollution that threaten basic biosphere functions, heroic measures are called for. This is of course the situation with regard to atmospheric concentrations of greenhouse gases, especially in relation to the burning of the non-renewable resource coal; it is also the case with regard to hormone-mimicking petrochemical pollution that inhibits reproduction in many vertebrate species. In the first instance: merely to reduce coal consumption by the global coal depletion rate would not suffice to avert a climatic catastrophe. The coal depletion rate is small, climate impacts from coal combustion emissions are building quickly, and annual reductions in those emissions must occur at high rates if ecosystem-threatening consequences are to be avoided. Similarly, in the case of petrochemical pollution, merely to reduce the dispersion of plastics and other petrochemicals into the environment by the annual rate of depletion of oil and natural gas would not suffice to avert environmental harms on a scale potentially leading to the collapse of ecosystems and human societies.

In the case that reduction in emissions or other pollutants can be obtained without a reduction in consumption of non-renewable resources, for example by using technological means to capture polluting substances and sequester them harmlessly, or by curtailing the production of certain industrial chemicals, then a reduction in consumption of such resources need only occur at the depletion rate in order to achieve sustainability. However, society should be extremely skeptical and careful regarding claims for untested technologies’ abilities to safely sequester polluting substances for very long periods of time.

This axiom builds upon Natural Step condition 2.


These axioms are of course open to further refinement. I have attempted to anticipate criticisms likely to be leveled at them, which will probably be of the sort that says these axioms are not sufficient to define the concept of sustainability. The most obvious of these is worth mentioning and discussing here: Why is there no axiom relating to social equity (similar to the Natural Step’s fourth condition)?

The purpose of the axioms set forth here is not to describe conditions that would lead to a good or just society, merely to a society able to be maintained over time. It is not clear that perfect economic equality or a perfectly egalitarian system of decision-making is necessary to avert societal collapse. Certainly, extreme inequality seems to make societies vulnerable to internal social and political upheaval. On the other hand, it could be argued that a society’s adherence to the five axioms as stated will tend to lead to relatively greater levels of economic and political equality, thus obviating the need for a separate axiom in this regard. In anthropological literature, modest rates of resource consumption and low population sizes relative to the available resource base are correlated with the use of egalitarian decision-making processes and with economic equity—though the correlation is skewed by other variables, such as means of sustenance (hunting-and-gathering societies tend to be highly equitable and egalitarian, while herding societies tend to be less so). If such correlations continue to hold, the reversion to lower rates of consumption of resources should lead to a more rather than less egalitarian society.14

Will local, national, and international leaders ever shape public policy according to these five axioms? Clearly, policies that would require an end to population growth—and perhaps even a population decline—as well as a reduction in the consumption of resources would not be popular, unless the general populace could be persuaded of the necessity of making its activities sustainable. However, if leaders do not begin to abide by these axioms, society as a whole, or some aspects of it, will assuredly collapse. Perhaps this is sufficient incentive to overcome the psychological and political resistance that would otherwise frustrate efforts toward true sustainability.


1. Eric Freyfogle, Why Conservation Is Failing and How It Can Regain Ground (Yale University Press, 2006)
2. World Commission of Environment and Development, “Our Common Future” (1987),
3. Albert A. Bartlett, “Reflections on Sustainability, Population Growth, and the Evnironment—Revisted.” Renewable Resources Journal, Vol. 15, No. 4, Winter 1997-1998, 6-23.

5. William E. Rees and Mathis Wackernagel, Our Ecological Footprint (New Society, 1995).
6. Bartlett 1998, op. cit.
7. Simon Dresner, Principles of Sustainability (Earthscan, 2002); Andres Edwards, The Sustainability Revolution: Portrait of a Paradigm Shift (New Society, 2005)
8. Julian Simon, “The State of Humanity: Steadily Improving.” Cato Policy Report, Vol. 17, No. 5, 131.
9. Jared Diamond, Collapse: How Societies Choose to Fail or Succeed (Viking, 2005); Joseph Tainter, The Collapse of Complex Societies (Cambridge University Press, 1988)
10. Bartlett 1998, op. cit.
11. E.g., Simone Valente, “Sustainable Development, Renewable Resources and Technological Progress” in Environmental and Resource Economics Vol. 30, No. 1, January 2005, 115-125.
12. Albert A. Bartlett, “Sustained Availability: A Management Program for Nonrenewable Resources.” American Journal of Physics, Vol. 54, May 1986, 398-402
13. Richard Heinberg, The Oil Depletion Protocol: A Plan to Avert Oil Wars, Terrorism and Economic Collapse (New Society, 2006);
14. See, for example, Marshall Sahlins, Stone Age Economics (Aldine, 1972); Gerhard Lenski, Power and Privilege (University of North Carolina Press, 1977); and Ivan Illich, Energy and Equity (Calder and Boyars, 1974).

0.0 ·
What's Next
Trending Today
Noam Chomsky Has 'Never Seen Anything Like This'
Chris Hedges · 46,417 views today · Noam Chomsky is America’s greatest intellectual. His massive body of work, which includes nearly 100 books, has for decades deflated and exposed the lies of the power elite...
HyperNormalisation (2016)
161 min · 17,711 views today · We live in a time of great uncertainty and confusion. Events keep happening that seem inexplicable and out of control. Donald Trump, Brexit, the War in Syria, the endless...
10 Quotes From an Oglala Lakota Chief That Will Make You Question Everything About Our Society
Wisdom Pills · 9,233 views today · Luther Standing Bear was an Oglala Lakota Sioux Chief who, among a few rare others such as Charles Eastman, Black Elk and Gertrude Bonnin occupied the rift between the way of...
Donald and Hobbes Is Genius
Various · 7,017 views today · Some clever folk have been replacing precocious 6-year-old Calvin, from the Calvin and Hobbes comic strips, with Donald Trump and the results are, well, take a look...
Introversion Is Not a Personality Fail
Cat Elz · 6,218 views today · A few years ago, I got into an argument with my now mother-in-law over my supposedly “backwards” ways. My transgression? I did not attend a party of my now husband’s (then...
The Important Difference Between Love and Being Loved
2 min · 3,943 views today · We talk of love as if it were just one thing: in fact, it’s two very different moves, Loving and Being Loved. You start to grow up when you stop focusing on the latter and get...
The Untold History of Palestine & Israel
22 min · 3,789 views today · Previewing Abby Martin’s on-the-ground investigation in Palestine, The Empire Files looks at the long history of Zionist colonization, expansion and expulsion of Palestine’s...
Our Obsession With 'Good Immigrants' Breeds Intolerance
2 min · 3,309 views today · Society sets the bar so high to become a 'good immigrant', argues writer Nikesh Shukla, that normal immigrants are demonised. He says non-Brits in the public eye have a simple...
Planet Earth II Could Be Best Nature Doc Ever Made
3 min · 2,534 views today · 10 years ago Planet Earth changed our view of the world. Now we take you closer than ever before. This is life in all its wonder. This is Planet Earth II. A decade ago, the...
Your Lifestyle Has Already Been Designed (The Real Reason For The Forty-Hour Workweek)
David Cain · 2,514 views today · Well I’m in the working world again. I’ve found myself a well-paying gig in the engineering industry, and life finally feels like it’s returning to normal after my nine months...
World's Low-Cost Economy Built on the Backs of 46 Million Modern Day Slaves
Deirdre Fulton · 2,432 views today · 'Business leaders who refuse to look into the realities of their own supply chains are misguided and irresponsible.'
Today I Rise: This Beautiful Short Film Is Like a Love Poem For Your Heart and Soul
4 min · 2,379 views today · "The world is missing what I am ready to give: My Wisdom, My Sweetness, My Love and My hunger for Peace." "Where are you? Where are you, little girl with broken wings but full...
Consent, Explained for Donald Trump and His Apologists
7 min · 2,125 views today · Vox's Emily Crockett explains why Donald Trump's comments aren't just "lewd," they're predatory. Further viewing, consent explained with tea. 
Are You Lost in the World Like Me?
3 min · 1,484 views today · Animated film by Steve Cutts for 'Are You Lost In The World Like Me?', taken from These Systems Are Failing- the debut album from Moby & The Void Pacific Choir. 
Anarchists - What We Stand For
unknown · 1,448 views today · Anarchism : The word “anarchy” comes from Greek and means “no rulers”. As a political philosophy, anarchism is based on the idea that organization does not require rulers—that...
For Those Who Don't Want to Vote for the Lesser of Two Evils
Peter White · 1,289 views today · Ranked-choice voting is catching on, and Maine might become the first state to help citizens vote for candidates they actually want.
A Simple 6 Step Self Compassion Exercise to Combat Depression and Low Self Esteem
5 min · 1,285 views today · It’s all too easy to be extremely tough on ourselves; we need – at points – to get better at self-compassion. Here is an exercise in how to lessen the voices of self-flagellation.
Bird Watching on Lesvos Island - A Poetic Call to Stand With Refugees
3 min · 1,072 views today · Born in Darfur, Sudan and raised in Philadelphia, Emi Mahmoud is the 2015 World Poetry Slam Champion and the Women of the World co-Champion of 2016. From a young age Emi...
The Four Qualities of Love
2 min · 1,006 views today · Thich Nhat Hanh explains the Four Qualities of Love that can bring deep meaning to our lives.
What Makes Call-Out Culture So Toxic
Asam Ahmad · 895 views today · Call-out culture refers to the tendency among progressives, radicals, activists, and community organizers to publicly name instances or patterns of oppressive behaviour and...
Load More
Like us on Facebook?
Five Axioms of Sustainability