Climate change and civilizational collapse

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This 1902 article attributes to Swedish Nobel laureate (for chemistry) Svante Arrhenius a theory that coal combustion could eventually lead to a degree of global warming causing human extinction.[1]

Climate change and civilizational collapse refers to a hypothetical risk of the

human population caused by the direct and indirect impacts of climate change, and often, it is also associated with a permanent reduction of the Earth's carrying capacity. Finally, it is sometimes suggested that a civilizational collapse caused by climate change would soon be followed by human extinction
.

Some researchers connect historical examples of

crop failure and the Thirty Years' War, took place during the Little Ice Age. In 2011, a general connection was proposed between adverse climate variations and long-term societal crises during the preindustrial times.[4]
However, all of these events were limited to individual human societies: a collapse of the entire human civilization would be historically unprecedented.

Some of the more extreme warnings of civilizational collapse caused by climate change, such as a claim that civilization is highly likely to end by 2050, have attracted strong rebutals from scientists.

climate scientists have argued that higher levels of warming—between about 3 °C (5.4 °F) to 5 °C (9.0 °F) over preindustrial temperatures—may be incompatible with civilization, or that the lives of several billion people could no longer be sustained in such a world.[8][9][10][11] In 2022, they have called for a so-called "climate endgame" research agenda into the probability of these risks, which had attracted significant media attention and some scientific controversy.[12][13][14]

Some of the most high-profile writing on climate change and civilizational collapse has been written by non-scientists. Notable examples include "

Opinion polling has provided evidence that people across the world believe that the outcomes of civilizational collapse or human extinction are much more likely than the scientists believe them to be.[19][20]

Suggested historical examples

This section is an excerpt from Societal collapse § Natural disasters and climate change.[edit]

Archeologists identified signs of a megadrought for a millennium between 5,000 and 4,000 years ago in Africa and Asia. The drying of the Green Sahara not only turned it into a desert but also disrupted the monsoon seasons in South and Southeast Asia and caused flooding in East Asia, which prevented successful harvest and the development of complex culture. It coincided with and may have caused the decline and the fall of the Akkadian Empire in Mesopotamia and the Indus Valley Civilization.[21] The dramatic shift in climate is known as the 4.2-kiloyear event.[22]

The highly advanced

Indus Valley Civilization took roots around 3000 BC in what is now northwestern India and Pakistan and collapsed around 1700 BC. Since the Indus script has yet to be deciphered, the causes of its de-urbanization[23] remain a mystery, but there is some evidence pointing to natural disasters.[24] Signs of a gradual decline began to emerge in 1900 BC, and two centuries later, most of the cities had been abandoned. Archeological evidence suggests an increase in interpersonal violence and in infectious diseases like leprosy and tuberculosis.[25][26] Historians and archeologists believe that severe and long-lasting drought and a decline in trade with Egypt and Mesopotamia caused the collapse.[27] Evidence for earthquakes has also been discovered. Sea level changes are also found at two possible seaport sites along the Makran coast which are now inland. Earthquakes may have contributed to decline of several sites by direct shaking damage or by changes in sea level or in water supply.[28][29][30]

More generally, recent research pointed to climate change as a key player in the decline and fall of historical societies in China, the Middle East, Europe, and the Americas. In fact, paleoclimatogical temperature reconstruction suggests that historical periods of social unrest, societal collapse, and population crash and significant climate change often occurred simultaneously. A team of researchers from Mainland China and Hong Kong were able to establish a causal connection between climate change and large-scale human crises in pre-industrial times. Short-term crises may be caused by social problems, but climate change was the ultimate cause of major crises, starting with economic depressions.[31] Moreover, since agriculture is highly dependent on climate, any changes to the regional climate from the optimum can induce crop failures.[32]

A more recent example is the
sunspots being exceedingly rare. Episodes of social instability track the cooling with a time lap of up to 15 years, and many developed into armed conflicts, such as the Thirty Years' War (1618–1648),[31] which started as a war of succession to the Bohemian throne. Animosity between Protestants and Catholics in the Holy Roman Empire (in modern-day Germany) added fuel to the fire. Soon, it escalated to a huge conflict that involved all major European powers and devastated much of Germany. When the war had ended, some regions of the empire had seen their populations drop by as much as 70%.[33][34] However, not all societies faced crises during this period. Tropical countries with high carrying capacities and trading economies did not suffer much because the changing climate did not induce an economic depression in those places.[31]

Modern discussion

2000s

As early as in 2004, a book titled Ecocriticism explored the connection between apocalypticism as expressed in religious contexts, and the secular apocalyptic interpretations of climate and environmental issues.[35] It argued that the tragic (preordained, with clearly delineated morality) or comic (focused on human flaws as opposed to inherent inevitability) apocalyptic framing was seen in the past works on environment, such as Rachel Carson's Silent Spring (1962), Paul and Anne Ehrlich's The Population Bomb (1972), and Al Gore's Earth in the Balance (1992).[36][37]

In the mid-2000s, James Lovelock gave predictions to the British newspapers The Independent and The Guardian, where he suggested that much of Europe will have turned to desert and "billions of us will die and the few breeding pairs of people that survive will be in the Arctic where the climate remains tolerable" by the end of the 21st century.[38][39] In 2008, he was quoted in The Guardian as saying that 80% of humans will perish by 2100, and that the climate change responsible for that will last 100,000 years.[40] By 2012, he admitted that climate change had proceeded slower than he expected.[41]

2010s-present

In late 2010s, several articles have attracted attention for their predictions of apocalyptic impacts caused by climate change. Firstly, there was "The Uninhabitable Earth",[15] a July 2017 New York magazine article by David Wallace-Wells, which had become the most-read story in the history of the magazine,[42] and was later adapted into a book. Another was "What if we stopped pretending?", an article written for The New Yorker by Jonathan Franzen in September 2019.[16] Both articles were heavily criticized by the fact-checking organization Climate Feedback for the numerous inaccuracies about tipping points in the climate system and other aspects of climate change research.[17][18]

Other examples of this genre include "What Comes After the Coming Climate Anarchy?", a year 2022 article for

TIME magazine by Parag Khanna, which had asserted that hundreds of millions of people dying in the upcoming years and the global population standing at 6 billion by the year 2050 was a plausible worst-case scenario.[43] Further, some reports, such as "the 2050 scenario" from the Australian Breakthrough – National Centre for Climate Restoration[44] and the self-published Deep Adaptation paper by Jem Bendell[45] had attracted substantial media coverage by making allegations that the outcomes of climate change are underestimated by the conventional scientific process.[46][47][48][49][50][51] Those reports did not go through the peer review process, and the scientific assessment of these works finds them of very low credibility.[5][52]

Notably, subsequent writing by David Wallace-Wells had stepped back from the claims he made in either version of The Uninhabitable Earth. In 2022, he authored a feature article for The New York Times, which was titled "Beyond Catastrophe: A New Climate Reality Is Coming Into View".[53] The following year, Kyle Paoletta argued in Harper's Magazine that the shift in tone made by David Wallace-Wells was indicative of a larger trend in media coverage of climate change taking place.[54]

Scientific consensus and controversy

The

anxiety, grief or other distress because of concerns over climate change?" just 40% answered "Yes, infrequently", with a further 21% responding "Yes, frequently", and the remaining 39% answering "No".[55] Similarly, when a high-profile paper warning of "the challenges of avoiding a ghastly future" was published in Frontiers in Conservation Science, its authors have noted that "even if major catastrophes occur during this interval, they would unlikely affect the population trajectory until well into the 22nd Century", and "there is no way—ethically or otherwise (barring extreme and unprecedented increases in human mortality)—to avoid rising human numbers and the accompanying overconsumption."[56][57]

Only a minority of publishing scientists have been more open to apocalyptic rhetoric. In 2009, Hans Joachim Schellnhuber, the Emeritus Director of the Potsdam Institute for Climate Impact Research, stated that if global warming reached 4 °C (7.2 °F) over the present levels, then the human population would likely be reduced to 1 billion.[8] In 2015, he complained that this remark was frequently misinterpreted as a call for active human population control rather than a prediction.[58] In a January 2019 interview for The Ecologist, he claimed that if we find reasons to give up on action, then there's a very big risk of things turning to an outright catastrophe, with the civilization ending and almost everything which had been built up over the past two thousand years destroyed.[9]

In May 2019, The Guardian interviewed several climate scientists about a world where 4 °C (7.2 °F) of warming over the preindustrial has occurred by 2100: one of them was Johan Rockström, who was reported to state "It’s difficult to see how we could accommodate a billion people or even half of that" in such a scenario.[10] Around the same time, similar claims were made by the Extinction Rebellion activist Roger Hallam, who said in a 2019 interview that climate change may "kill 6 billion people by 2100"—a remark which was soon questioned by the BBC News presenter Andrew Neil[59] and criticized as scientifically unfounded by Climate Feedback.[6] In November 2019, The Guardian article was corrected, acknowledging that Rockström was misquoted and his real remarks were "It’s difficult to see how we could accommodate eight billion people or maybe even half of that".[10]

Climate endgame

In August 2022, Schellnhuber, Rockström and several other researchers, many of whom were associated with

hurricanes, floods), war (caused by the scarce resources), systemic risk (relating to migration, famine, or conflict), and disease was "dangerously underexplored".[13][12]
The paper suggested that the following terms should be actively used in the future research.

Conceptual causal loop diagram of cascading global climate failure used in the "Climate endgame" paper.[12]
Defining key terms in the Climate Endgame agenda[12]
Term Definition
Latent risk Risk that is dormant under one set of conditions but becomes active under another set of conditions.
Risk cascade Chains of risk occurring when an adverse impact triggers a set of linked risks.
Systemic risk The potential for individual disruptions or failures to cascade into a system-wide failure.
Extreme climate change Mean global surface temperature rise of 3 °C (5.4 °F) or more above preindustrial levels by 2100.
Extinction risk The probability of human extinction within a given timeframe.
Extinction threat A plausible and significant contributor to total extinction risk.
Societal fragility The potential for smaller damages to spiral into global catastrophic or extinction risk due to societal vulnerabilities, risk cascades, and maladaptive responses.
Societal collapse Significant sociopolitical fragmentation and/or state failure along with the relatively rapid, enduring, and significant loss capital, and systems identity; this can lead to large-scale increases in mortality and morbidity.
Global catastrophic risk The probability of a loss of 25% of the global population and the severe disruption of global critical systems (such as food) within a given timeframe (years or decades).
Global catastrophic threat A plausible and significant contributor to global catastrophic risk; the potential for climate change to be a global catastrophic threat can be referred to as "catastrophic climate change".
Global decimation risk The probability of a loss of 10% (or more) of global population and the severe disruption of global critical systems (such as food) within a given timeframe (years or decades).
Global decimation threat A plausible and significant contributor to global decimation risk.
Endgame territory Levels of global warming and societal fragility that are judged sufficiently probable to constitute climate change as an extinction threat.
Worst-case warming The highest empirically and theoretically plausible level of global warming.
Overlap between state fragility, extreme heat, and nuclear and biological catastrophic hazards.
Overlap between state fragility, extreme heat, and nuclear and biological catastrophic hazards according to the "Endgame" paper[12]
Overlap between future population distribution and extreme heat.
Overlap between future population distribution and extreme heat according to the same paper[12] This graphic was criticized for using a scenario considered unlikely and worse than the present trajectory.[14]

The paper was very high-profile, receiving extensive media coverage

fascist policies.[14] In response, the authors of the original paper wrote that in their view, catastrophic risks may occur even at lower levels of warming due to risks involving human responses and societal fragility. They also suggested that instead of the one-child policy, a better metaphor for responses to extreme risks research would be the 1980s exploration of the impacts of nuclear winter, which had spurred nuclear disarmament efforts.[65]

Climate Strike
in 2019

Public opinion

See also: Media coverage of climate change, Psychological impact of climate change, and Doomer

Some

US): one of its findings was 55% of respondents agreeing with the statement "humanity is doomed".[19]

In 2020, a survey by a French think tank

developed countries (France, Germany, Italy, the UK and the US), a significant fraction of the population agreed with the statement that "civilization as we know it will collapse in the years to come"; the percentages ranged from 39% in Germany and 52% or 56% in the US and the UK to 65% in France and 71% in Italy.[20]

See also

References

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Works cited
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