Worlds within worlds: Outpost (2007) by the artist Anne Hardy. Photograph: Anne Hardy, courtesy of Maureen Paley, London
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Terry Pratchett, science and story telling

The best of all possible worlds.

Terry Pratchett’s first Discworld novel was published in 1983. As a wartime child in the 1940s I was already puzzling over an image of a domed world poised on the backs of three elephants that stood on a monstrous turtle. This discworld had a small temple on top of it, and the clawed feet of the turtle rested on the coils of a huge serpent, which also stretched to encircle the world, with the point of its tail in its mouth. It was reproduced in my favourite book, Asgard and the Gods, a scholarly German work on Norse myths, which my mother had used at Cambridge.

This image, and this book, provoked my earliest thinking about the nature of belief and its relation to storytelling. Where on earth did the idea of the turtle and the elephants come from? Did people really believe in them? These questions were related to the kind of embarrassed pain with which I contemplated the stories of origins I was expected to believe in, the Bible with its heaven and hell, the tale of judgement to come.

Pratchett’s new book, The Science of Discworld IV, co-written with the mathematician Ian Stewart and the biologist Jack Cohen, discusses ideas about origins and endings, cosmology and astrobiology, entropy and genetics. The idea of storytelling is not just an embroidered way of including a tale of the discussion of the “Roundworld” taking place on the Discworld. Human beings are defined as pan narrans, the storytelling ape, who exists in a dimension known as the “narrativium”. We look for causes because we think in linear sequences of words. We look for origins because we arrange our world into narrative strings with beginning, middle and end. Stewart, Cohen and Pratchett set out to puzzle us and make us think differently.

Central to their approach is the distinction made by the physicist and sciencefiction author Gregory Benford between human-centred thinking and universecentred thinking. Human-centred thinking comes naturally to human beings. “In this world-view, rain exists in order to make crops grow and to provide fresh water for us to drink. The sun is there because it warms our bodies.” From human-centred thinking comes the idea of a ruler of the universe, as well as the idea that the earth and the creatures, the sea and the oil and the forests are somehow there for our benefit. Universe-centred thinking, on the other hand, sees human beings as “just one tiny feature of a vast cosmos, most of which does not function on a human scale or take any notice of what we want”. The universecentred thinker must have what Keats called “negative capability” – the capacity to be in uncertainties, mysteries, doubts, without any irritable reaching after fact and reason. This is hard and invigorating.

The writers discuss creation myths – including a number of myths about cosmic turtles and scientific ideas about origins, including the Big Bang. They discuss the evolution of ideas about evolution, recent thoughts about the relation of RNA to DNA and the idea of the curvature of space. They also consider neural networks and decision theory, and the strong and weak anthropic principles – ideas about how the physical universe is uniquely suited to the existence of human beings.

Pratchett and co also explore the psychology of belief and disbelief. They describe one way of coming to conclusions – the brain taking in new evidence, and fitting it to the knowledge and beliefs it already holds. This is what they call “System 1”, and it includes scientific thinkers as well as people with inherited religious beliefs. There are, they say, scientists who “know” that DNA is the most important part of the system, physicists who “know” that the world is moving towards entropy. “System 2”, on the other hand, is steadily analytical and sceptical – “trying, not always successfully, to ignore inbuilt prejudices”. Karl Popper’s system of “critical rationalism” held that a theory could be considered scientific if, and only if, it was capable of falsification. Stewart and Cohen claim that “scientists actively try to disprove the things they would like to be true”. They use the example of a believer in UFOs who sees disbelief in UFOs as another form of belief. “Zero belief in UFOs”, they point out, is not the same as 100 per cent belief in the non-existence of UFOs. “Zero belief is an absence of belief, not an opposed form of belief.” What they aspire towards and desire is “a disbelief system”. This is exhilarating.

I remember being on a platform where various poets and writers discussed the ways in which the arts could figure the world of the scientist. That blunt sceptic Lewis Wolpert, sitting in the audience, rose to inform the assembled artists that we would not understand any of his work were we to find ourselves in his laboratory. Some of us were indignant but I believe he was right. People like me can read what is written by those scientists who try to tell us about neurons, genes, the shape of the brain, the shape of space and time. We can respond to those descriptions but we are responding to stories, at second hand.

One of the most pleasing things about Pratchett, Stewart and Cohen’s book is the way the authors demonstrate that we don’t understand even what we think we understand. I realised, reading their account of the complex relations between RNA and DNA, that I had been guilty of holding a belief. I was very excited in the late 1970s by ideas about the “selfish gene”, and particularly by the points made by John Maynard Smith about the immutable nature of the inherited and eternal germ cell. Now the New Scientist is full of articles about newly discovered “orphan DNA”. Stewart and Cohen write:

Darwin’s tree of life, a beautiful idea that derives from a sketch in The Origin of Species and has become iconic, gets very scrambled around in its roots because of a process called horizontal gene transfer. Bacteria, archaea and viruses swap genes with gay abandon, and they can also insert them into the genomes of higher animals, or cut them out. So a gene in one type of bacterium might have come from another type of bacterium altogether, or from an archaean, or even from an animal or a plant.

The story I believed in has to be modified and rethought. When I read this, I think in a human way with a series of images, in the grammar of a story. I should not be able to recognise any gene, let alone think intelligently about it. Stewart and Cohen are very good at illustrating our incapacity to understand. They do so with images and stories. My favourite is the one they tell to make us think about the difference between complicated chemistry and the “organised complexity” of the ribosome. It is a story about caramel.

Every cook knows that heating sugar with fats, two fairly simple chemical substances, produces caramel . . .  Caramel is enormously complicated on a chemical level. It includes innumerable different molecules, each of which has thousands of atoms. The molecular structure of caramel is far more complicated than most of the molecules you’re using to read this page.

But the complexity of caramel, or other complicated polymers, doesn’t produce organised complexity, as ribosomes do. Wolpert would rightly tell me that I still don’t know anything about the ribosomes. But I am at least able now to think about the problem. And the juxtaposition of caramel and brain is unforgettable. There are delights like this on most pages of this book.

In a chapter entitled “Where did that come from?” we are invited to reflect on how we can’t think about things like the origin of an oak tree, or a child, or even a thunderstorm. They make the reader imagine thinking about clouds, the constituents of the atmosphere, static electricity, physics and physical chemistry. Most of us, they say, “will not have come across one or more phrases such as ‘saturated solution’ or ‘particle carries a tiny electrical charge’. These phrases are themselves simplifications of concepts with many more associations, and more intellectual depth, than anyone can be expected to generate for themselves.” Human beings tend to retreat from uncertainty or difficulty into belief stories, like the American Republican candidate who opposed any regulation of the markets on the grounds that this was “interfering with God’s plan for the American economy”.

Pratchett, Stewart and Cohen use their method of complicating descriptions and explanations to examine several problems with things I have trouble with believing myself, because they feel to me like human stories that tidy up our relation to the universe – the Big Bang, the existence of dark matter, entropy and the “anthropic principle”. They discuss conflicting views of the expanding universe and the steady state and cast doubt on the existence of dark matter. They are not propounding or supporting any particular theory of the shape and origins of the universe, but are rather considering evidence that complicates the explanations we have become used to. They are good at picking out the operations of what they call our “very parochial” minds, which use ideas of space and time that evolved with us. “Our view of the universe may be just as parochial as the world-bearing animals of ancient cultures were. Future scientists may view both the Big Bang and four elephants riding on a turtle as conceptual errors of a very similar kind.”

In Richard Feynman’s The Character of Physical Law, they find a tendency evident in “too many physicists” to consider physical reality to be all of reality. Feynman, they write, states that “the same kind of atoms appear to be in living creatures as in non-living creatures [sic]; frogs are made of the same ‘goup’ as rocks only in different arrangements”. Things in the biological world are the results of the behaviour of physical and chemical phenomena with no “extra something.” Stewart and Cohen agree about the “no extra something” but think that a bleak view of the world of particles and elements misses out the complexity of living things, and the things they make and use and learn from.

Entropy may not be our destiny – they see Feynman rather as Pratchett sees his undifferentiated auditors, who want to tidy everything up into packets of particles. Life, say Stewart and Cohen, has “lifted itself up into a story”. That is a metaphor – and an attractive one. It feels right, and should therefore be regarded with the necessary doubt and suspicion. They also take a mocking run at the idea of “fine-tuning”, the idea that the world has evolved as the only possible world in which humans could exist – just the right amount of carbon and water, and so on.

This “anthropic principle”, in both its strong and its weak forms, has always horrified me because it is so clearly a function of the human mind thinking in a humancentred way. Isn’t it amazing, say the Discworld scientists, that our legs are just long enough to reach the ground? Isn’t it amazing that there was a hole exactly the right size to contain that puddle? And what about a sulphur-centred form of thought?

There was one chapter I found hard to understand – on the curvature of space, round worlds and disc worlds. This was where I wished the book had illustrations – I read pages about the doughnut-shaped torus, and then had the sense to consult Wikipedia, where I could see what was being discussed. And I also needed to see the geometry of the wonderful Escher image of angels and demons.

I have become rather sad about surviving into the anthropocene age of human history, where everything is controlled and constructed by and for what the King of Brobdingnag called “the most pernicious race of little odious vermin that Nature ever suffered to crawl upon the surface of the earth”. But, paradoxically, both Pratchett’s storytelling and the resolutely universecentred perspective of the scientists make me happier to be human. I look forward to the next volume.

“The Science of Discworld IV: Judgement Day” by Terry Pratchett, Ian Stewart and Jack Cohen is published by Ebury Press (£18.99). A S Byatt’s most recent book is “Ragnarok: the End of the Gods” (Canongate, £7.99

Both A S Byatt and Terry Pratchett will be appearing at How the Light Gets In, the festival of philosophy and music in Hay on Wye. For more details, visit:  www.howthelightgetsin.org

This article first appeared in the 12 April 2013 issue of the New Statesman, Centenary Special Issue

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View from Paisley: How the Conservatives are wooing Labour's Scottish heartlands

Not so long ago, Conservative activists in Paisley could expect doors slammed in their faces. A referendum has changed that.

Tony Lawler, a Labour activist, was recently knocking on doors in the Scottish town of Paisley, when he came across a disgruntled resident. “I’m really disappointed in Douglas Alexander,” the potential voter complained. “I haven’t seen him. He used to be in Morrisons.”

Douglas Alexander, of course, has gone. He was the longstanding Labour MP and onetime International Development secretary who lost his seat in 2015 to a 20-year-old rival, the Scottish National Party’s Mhairi Black. He does not plan to stand again. But when I visit Paisley, a short train ride from Glasgow, I find that memories of him linger on. 

Two years after Alexander’s defeat, I meet Lawler and other local Labour activists in Morrisons, where Alexander used to hold his surgeries. As checkouts beep and trolley wheels roll over linoleum, they point to an empty table in the corner of this hallowed ground: “He used to sit just there.”

In 2015, the SNP’s victory in this former manufacturing town seemed to epitomise the earthquake in Scottish politics. But as the Labour activists know too well, no political fortress is undefeatable. And in Paisley, the home of one of the oldest workers’ festivals in the world, the party with the most to gain is one that previously never dared to canvass in the high street – the Conservative party. 

The town the Brexiteers forgot

In 1988, the historian Sylvia Clarke reflected on Paisley’s lost industries, wondering what was next for the former weaving towns. “Paisley as a tourist centre?” she wondered, in Paisley: A History. “Paisley as a place for visitors to come to, rather than a send-out of goods and emigrants?” 

For all Paisley’s industrial decline, it’s a pretty place. The town is in the running for the 2021 City of Culture, and has the second biggest number of listed buildings after Edinburgh. When I visit in the middle of April, blossom floats on the trees, and a river meanders through a neighbourhood of old, stone houses. It takes a moment to notice weeds tightening their grasp on the window frames. When I try the door of the ancient Paisley Abbey, it’s locked.

Perhaps if Paisley had been located the other side of the border, in Sunderland or Northumbria, it would be voting Leave and flirting with Ukip. But in the most deprived areas here, Labour activists tell me the EU referendum tally was still almost 50-50, and overall the town voted Remain.

There is a view that Brexit is an English concern. “We haven’t picked up anything about the EU referendum,” says Lawler of his doorstep conversations. “What people are talking about is the independence referendum, Jeremy Corbyn and the kids’ ward.” Scotland’s health secretary, Shona Robison, is due to make a decision on whether the specialist ward should be moved to a large hospital in the First Minister’s Glasgow constituency, against the wishes of many Paisley residents. The hospital in question is nicknamed “the Death Star”.  

Another concern, reminiscent of small towns across the UK, is the decline of the high street. When I walk down the historical shopping area Causeyside Street, I find mother and daughter Kate and Linda Hancy packing up what remains of The Pattern Café and Gift Shop. The wallpaper is a glorious Paisley print, but the scented candles are in boxes and a spray soap bottle hangs from a chair. After two years of trying, they are closing down.  

“People just don’t have money to spend,” Kate says. “A lot of people have been on the same wage for more than five years.”

Linda chimes in: “The cost of living going up but wages aren’t the same. I work in a supermarket, and people come in and say ‘How did I spend this much money?’ A lot of people are paying by credit cards.”

The Hancys voted to remain in the UK, and the EU. Although they knew Alexander, they have never met Mhairi Black, and feel devolution, if anything, has made politicians less accountable. “Why are we picking 1,2,3,4,” demands Kate, referring to Holyrood's voting system, which rejected first past the post. “Why can’t we pick one like we used to?”

Without the EU to blame, the most obvious culprits for Paisley town centre’s decline are the out-of-town shopping centres, where cinemas are opening just as historical ones in town close their doors.

Gavin Simpson, owner of Feel the Groove, a new record shop, remembers the 1980s, when a new release would have shoppers queuing round the block. However, he believes the town is over the worst. (As we speak, a customer comes in to reserve such a record and cheerfully warns Gavin that “even if I ask for my money back, don’t give it to me.”)

One thriving business is the longstanding butchers, Wm Phelps. Manager James Peacock tells me it is down to the trustworthy Scottish produce, which is carefully tracked and labelled. But the business has also embraced globalisation.  After noticing a large number of South African customers, Peacock began selling boerewors and biltong.

The other referendum campaign

If Paisley has been spared the divisions of the EU referendum campaign, its “buddies” – as residents are known – are still reeling with the repercussions of an earlier referendum, that on Scotland in the UK. In 2014, the town voted for independence, although the county overall opted to stay in the UK. 

The town is home to a particularly brash strain of indyreffers, including the “Smith Commission burners”, three SNP councillors who gathered in front of the council headquarters to burn a copy of the report setting out new powers for Scotland. One of them, Mags MacLaren, went on to manage Black’s constituency office.

But if the Paisley independence movement has been well covered, less is known about its opposite - the rise of pro-unionism. 

Of the three mainstream parties opposed to independence, it is the Scottish Conservatives, with their unconventional leader Ruth Davidson, who have most effectively capitalised on the pro-union message. In the 2016 Scottish Parliament elections, the Tory Jackson Carlaw captured the West of Scotland constituency of Eastwood, which had been held by Labour since its creation. 

In Holyrood, the Scottish Tories benefit from proportional representation, which allows voters to choose a constituency MSP but also rank parties. 

According to Paul Masterton, the Tory candidate for East Renfrewshire, and the secretary of the Renfrewshire and Inverclyde Scottish Conservative Association, the Conservatives are now getting huge numbers of first preference votes, including in neighbourhoods like the suburb of Ralston, where both Black and Masterton are from. So who are these voters? Masterton describes them as “New Labour voters who were happy with Tony Blair and Gordon Brown but didn’t like Jeremy Corbyn and get tied up into knots by [Scottish Labour leader] Kezia Dugdale flipflopping on the union stance".

The 2016 election saw the Scottish Conservatives surge to second place in Scotland – a superb comeback for a party once ridiculed as being rarer than pandas. The next electoral test is the local council elections. In Paisley, even Labour activists acknowledged the Conservatives were likely to be the most notable winners.

“For a long time we simply didn’t go out in Paisley," says Masterton. "We were written off and we allowed ourselves to be written off.”

But the referendum has changed this. “What I found was that last May, people weren’t shutting the door in your face," he adds. "Once you started the conversation they were far more receptive to that.” 

Like the Labour activists, Masterton argues that the constitutional question matters more than Brexit. “When Theresa May said ‘now is not the time’, I think a lot of people across Paisley did a small quiet fist pump,” he says of a second independence referendum.  

Ironically, after the early election is called, the Scottish Conservatives do everything they can to mention the prospect. “Don't mention the 'i' word,” crows a recent press release about the “SNP indyref ban”. Davidson tweets: “Nicola doesn't want to stand on her record. She knows the country doesn't want her #indyref2.” A Panelbase survey commissioned by The Sunday Times Scotland published shortly after the early election was announced finds support for the Conservatives at Scotland at 33 per cent, 18 percentage points higher than in 2015. 

What you stand for

For now, Paisley remains a Scottish National Party stronghold. George Adams, the MSP with an office off the high street, proves elusive – Labour activists confirm his reputation as a hardworking local. Black’s aide turns down my request for an interview for similar reasons, but I bump into her that evening at a protest against cutting child tax credits in Glasgow’s George Square.

Black, an admirer of the left-wing Labour figure Tony Benn, once said she feels "it is the Labour party that left me". I ask her if she, like her Labour predecessor, holds surgeries in supermarkets. Black says she’d considered it, but given the sensitivity of some of the issues, such as benefit problems, she thought her constituents might appreciate a more private space. “The main thing that crosses the door in my offices is Universal Credit changes,” she explains. She says she has raised her concerns about the children’s ward.

As for the independence debate, she argues that the Scottish government have been “incredibly compromising” since Brexit, but adds: “A lot of folk want another chance at the question.”

Black is standing for re-election. With a majority of more than 5,000, and neither of her previous challengers in the running, she’s likely to keep her seat, even if buddies' discontent over local issues rumbles on. 

Still, as I have discovered, the 2014 referendum continues to reverberate in towns like Paisley. It has divided friends and neighbours on constitutional lines, galvanised new strains of politics, and brought a Labour heavyweight crashing down, with no appetite to return. 

The Tories believe their unionist message is enough to flip seats like East Renfrewshire, once Conservative, then Labour, and now an SNP marginal. As the SNP's shine wears off, could Paisley, with its long tradition of the left, one day follow? It no longer feels implausible. “The one thing about the Scottish Conservatives - and this is true whatever you like us or not,” says Masterton. “You know what we stand for.”

 

Julia Rampen is the digital news editor of the New Statesman (previously editor of The Staggers, The New Statesman's online rolling politics blog). She has also been deputy editor at Mirror Money Online and has worked as a financial journalist for several trade magazines. 

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