Via Benny Peiser, below a heavily excerpted extract from “Beyond debate?” from Times Higher Education. The author is The Philosopher editor Martin Cohen, an environmental activist and the author of a forthcoming book tentatively titled Climate, Chaos and Irrationality: How the Green Agenda Was Hijacked by Global Warming Theorists.

Is belief in global-warming science another example of the “madness of crowds”? That strange but powerful social phenomenon, first described by Charles Mackay in 1841, turns a widely shared prejudice into an irresistible “authority”. Could it indeed represent the final triumph of irrationality? After all, how rational is it to pass laws banning one kind of light bulb (and insisting on their replacement by ones filled with poisonous mercury vapour) in order to “save electricity”, while ploughing money into schemes to run cars on … electricity? How rational is it to pay the Russians once for fossil fuels, and a second time for permission (via carbon credits) to burn them (see box page 36)? And how rational is it to suppose that the effects of increased CO2 in the atmosphere take between 200 and 1,000 years to be felt, but that solutions can take effect almost instantaneously? . . .
How this situation came about says much about how science is co-opted to sway public opinion. The case is built, deliberately or not, on misleading images and interpretations that have been perpetuated by parties with a vested interest. It morphs into a tool for governments to intimidate their populations into passive acceptance of very real changes: from the tiny, such as accepting miserable fluorescent light instead of the incandescent light we’ve been used to; to the major, like welcoming nuclear power plants and obliging rainforest tribes to make way for biofuel plantations.
Indeed, much of what is presented as hard scientific evidence for the theory of global warming is false. “Second-rate myth” may be a better term, as the philosopher Paul Feyerabend called science in his 1975 polemic, Against Method.
“This myth is a complex explanatory system that contains numerous auxiliary hypotheses designed to cover special cases, as it easily achieves a high degree of confirmation on the basis of observation,” Feyerabend writes. “It has been taught for a long time; its content is enforced by fear, prejudice and ignorance, as well as by a jealous and cruel priesthood. Its ideas penetrate the most common idiom, infect all modes of thinking and many decisions which mean a great deal in human life … “.
But call it what you will, as long as you don’t think that by calling it “science” it becomes irrefutable. Because that it ain’t. . . .
[A]s Solomon Asch, a social psychologist, discovered in the 1950s via a series of experiments, people are quite prepared to change their minds on even quite straightforward factual matters in order to “go along with the crowd”.
You can’t blame folk for doing that. Especially when to do otherwise would mean taking a close look at the scientific issues in climate-change theory. Much of the argument for global warming is based on modelling. The mathematics is sophisticated and certainly intimidating to everyone but experts. . . .
The reports of the United Nations Intergovernmental Panel on Climate Change (IPCC) — whose landmark 2001 report paved the way to ratification of the Kyoto Protocol – are not based on any new or original research, but merely reflect the efforts of participants, including government representatives, to overcome uncertainties in knowledge. Policymakers then use the IPCC reports, nuanced findings or not, to demand that the public change their ways. And most of the public are inclined to fall in line.
Social scientists call it “cascade theory”: the idea is that information cascades down the side of an “informational pyramid”, like a waterfall. It is easier for people, if they do not have either the ability or the interest to find out for themselves, to adopt the views of others. This is, without doubt, a useful social instinct. As it has been put, cascade theory reconciles “herd behaviour” with rational choice, because it is often rational for individuals to rely on information passed on to them by others.
Unfortunately, it is less rational to follow wrong information, and that is what can often happen. We find people cascading uselessly – like so many wildebeest fleeing a non-existent lion – in so many everyday ways. A lot of economic activity and business behaviour, including management fads, the adoption of new technologies and innovations, not to mention the vexed issues of health and safety regulation, reflect exactly this tendency of the herd to follow poor information.
Some people say that what is needed in response is to encourage a range of views to be heard, even when they are annoying to the “majority” – for instance, one should allow people to contest global warming. Or let teachers in schools and universities decide what they are going to teach. But more people say, on the contrary, that what is needed is stricter control of information to stop “wrong views” being spread. It is that view that is cascading down the pyramid now.
One of the best examples of cascade theory is that of the entirely false consensus that built up in the 1970s around the danger of “fatty foods”. In fact, this consensus still exists, even though it has never had any scientific basis.
The theory can be traced back to a single researcher, Ancel Keys, who published a paper saying that Americans were suffering from “an epidemic” of heart disease because their diet was more fatty than their bodies were used to after thousands of years of evolution.
In 1953, Keys added additional evidence from a comparative study of the US, Japan and four other countries. Country by country, this showed that a high-fat diet coincided with high rates of heart disease.
Unfortunately for this theory, it turned out that prehistoric “traditional diets” were not especially low-fat after all – indeed, even the hunter-gatherers of yore, if they relied on eating their prey, would have had more fat in their diet than most people do today. As Science magazine pointed out, in the most relevant period of 100 years before the supposed “epidemic” of heart disease, Americans were actually consuming large amounts of fatty meat, so the epidemic followed a reduction in the amount of dietary fat Americans consumed – not an increase.
Keys’ country-by-country comparison had also been skewed, with countries that did not fit the theory (such as France and Italy with their oily, fatty cuisines) being excluded. The American Heart Association (AHA), considered to be the voice of experts, issued a report in 1957 stating plainly that the fats-cause-heart-disease claims did not “stand up to critical examination”. The case for there being any such epidemic was dubious, too – the obvious cause of higher rates of heart disease was that people were living longer, long enough to develop heart disease. But it was too late: the cascade had started.
Three years later, the AHA issued a new statement, reversing its view. It had no new evidence but it did have some new members writing the report, in the form of Keys himself and one of his friends. The new report made the cover of Time magazine and was picked up by non-specialists at the US Department of Agriculture, who then asked a supporter of the theory to draw up “health guidelines” for them. Soon, scarcely a doctor could be found prepared to speak out against such an overwhelming “consensus”, even if a few specialised researchers still protested. And all this was good enough for the highest medical officer in the US, the Surgeon General, in 1988 to issue a doom-laden warning about fat in foods, and claiming that ice-cream was a health menace on a par with tobacco smoking.
It was a pretty silly theory, and certainly not one based on good evidence. In fact, in recent years, in large-scale studies in which comparable groups have been put on controlled diets (low fat and high fat) a correlation has at last been found. It turns out that the low-fat diet seems to be unhealthy. But no one is quite sure why.
The fact is, science has always been about PR, and as this example shows, it is easy for opinion leaders and experts to be misled. These days, it is not merely fellow researchers but professional marketeers vying to press their agenda and that of their clients.
At the Kyoto summit in 1997, Fenton Communications, a New York PR firm, was working with “green NGOs and leaders”, including Gore and the IPCC, to advise on how to “mainstream the climate threat” and to “harness the public ‘tipping point’” on the issue and inspire action, as its website today boasts. And indeed, the public have been well and truly tipped.
The IPCC reports, which are dull but widely used by governments as the basis for their policy discussions, have become steadily more dramatic. (Not for nothing does the head of the IPCC, R.K. Pachauri, have his own dedicated marketing adviser.) Climate Change 2007: The Physical Science Basis says that “numerous long-term changes in climate have been observed (including) changes in Arctic temperatures and ice, widespread changes in precipitation amounts, ocean salinity, wind patterns and aspects of extreme weather including droughts, heavy precipitation, heat waves and the intensity of tropical cyclones”.
Yet none of this is science. It certainly offends against the principle that Karl Popper calls “falsification” — in the case of climate change, there is no possibility of falsification. If you listen to proponents of climate-change theory, there is apparently nothing that counts as evidence against it. Increased rainfall in the northern hemisphere is evidence of climate change, but so is decreased rainfall in the southern hemisphere. Melting of ice in the Arctic is evidence of global warming, but cooling of the Antarctic is not evidence against, but attributed to “other effects”.
The fact is, the IPCC report’s statement quoted above is speculation and fear-mongering. So how did such language get in the report? Alas, it seems that the social and scientific reality is as Feyerabend describes, and that the language of fear has now “penetrated the most common idiom and infected all modes of thinking”.