Dear Earth: Art and Hope in a Time of Crisis @ the Hayward Gallery

This is an outstanding exhibition. It may be my favourite exhibition of the year so far. Why? At least six reasons:

1. Empty It was empty. When I arrived at 10 past 10 there were 5 or 6 people in it. When I left an hour later there were more visitors, maybe 30 to 40, but I could still walk into a room and be the only person there. This is very rare at a gallery. At a blockbuster show at the National or British Museum, by 11 it would be so packed it often gets hard to see the pictures. Here I waltzed from one big white empty room to another, almost completely alone, like a private view.

2. Cold The Hayward’s galleries are, for the most part, big and spacious. On the first floor they are light and airy. And all of them have excellent air conditioning! I arrived hot foot from the boiling, sweaty tube, and the weather outside was warm and humid. So entering big, white, airy and beautifully cool spaces was a welcome balm to the senses.

3. Outstanding art This exhibition is full of outstanding pieces of modern art. I’ll pick out the four or five highlights below, but it feels like an excellent introduction to this is what art is like now, in 2023. Not old paintings by dead white men from 100 years ago. Many of the works are from just the last few years, no fewer than seven of them were commissioned specially for this show, so these are by way of being world premieres.

4. Big installations Many of these works are big and immersive. There are plenty of photos and paintings and a few rooms devoted to huge projections of videos i.e. traditional media. But half a dozen of the works are really massive and impressive and enjoyable. It’s just fun to walk around a very big work of art.

5. International And it’s very cosmopolitan, very international. Art these days is, of course, an international business, with a non-stop calendar of festivals and biennales which artists, curators and gallery owners have to jet to all around the world (Beijing, Dubai, Venice, Buenos Aires) and, thanks to the internet, works from exhibitions all round the world can be seen online. But this particular selection is deliberately global in range. It felt like a series of windows into alternative worldviews, from other countries, other sensibilities.

(I suppose if you were being cynical, you could argue the opposite; that all the works have a certain sameyness, if not of execution, then certainly of worldview and mindset, products of a fully globalised artworld with a highly conformist artspeak. Well, on this day, at this exhibition, I was in a good mood – helped by the lovely air-conditioning – and so responded lightly and brightly to all the shiny exhibits and chose not to be dour and cynical.)

6. Women artists And the majority of the artists are women. I’m not sure you could tell from just the art works alone, but on this particular day, on this particular visit, I enjoyed the knowledge of being surrounded by the work of caring sharing women; maybe it contributed, at some level, to the calming, healing, hugely enjoyable tone of the whole show.

Climate change

On the ramp up to the second room or space you’re confronted by a motto made of neon signage by the ‘passionate ecofeminist’ and American artist, Andrea Bowers. It’s from 2017 and reads CLIMATE CHANGE IS REAL. Maybe that was sort of necessary in 2017 but I think most people in the West now know about climate change, most educated people anyway.

Just over the last few days the front pages of the newspapers, on the radio and TV, there have been reports of Keir Starmer’s speech being interrupted by climate activists, Just Stop Oil disrupted the cricket test, protesters threw stuff at George Osborne’s wedding; there was the news that Monday and Tuesday had been the hottest days on record; the UN announced that the climate crisis is now out of control. So it’s no longer a niche issue: it’s all over the press and media on a pretty much daily basis, in fact it’s hard to ignore it.

Given almost universal awareness of the climate crisis, what is the point and aim of an exhibition like this? Let’s quote the press and publicity material issued by the Hayward Gallery:

‘Dear Earth: Art and Hope in a Time of Crisis’ brings together fifteen pioneering artists from across the globe, many of whom have created new commissions for this exhibition. Their work invites us to imaginatively rethink our responses to many of today’s major environmental issues.

Taking its cue from Otobong Nkanga’s suggestion that ‘care is a form of resistance,’ the exhibition focuses on artworks that seek to rekindle our bond with the natural world as a means of developing new attitudes and sustainable ways of being. Different forms of care are made visible throughout the exhibition, whether through nurturing communities, tending to plants or joining protests.

Many of the artists foreground the interconnected nature of all beings and challenge us to engage and empathise with non-human perspectives. Some works highlight the voices of environmental activists; others underscore histories of industrial and chemical pollution, whilst illuminating ways in which the growing ecological crisis is entangled with social, economic and political spheres. There are also works that commemorate loss – of people, species, habitats – due to climate change or ecological degradation.

But in one way or another, all of the artworks in ‘Dear Earth’ inventively imagine an ethic of care and compassion. Mapping out an ecology of hope and spiritual connection, they seek to deepen our engagement with the subject in ways that ultimately nurture both our understanding and our capacity to act in support of our planet.

I don’t want to be negative, but I don’t really believe in any of that, in, for example, ‘an ecology of hope and spiritual connection’. This world, and our species, contains Vladimir Putin, the Wagner Group, Xi Jinping, Islamic State, Jair Bolsonaro. Mass murder and ecocide are arguably the distinguishing characteristics of our species.

On a more mundane level, most people think it is fine to own and drive a car. Me, I think it should be a criminal offence to own and drive a car, van, lorry, bus, coach, motorbike or scooter. They should be banned. Everyone should cycle or walk, maybe ride horses, a return to mid-Victorian horse and carts. Cities should be redesigned without ICE-powered vehicles so that people can live closer to their work. Flying should be banned, obviously.

Either we need to make complete and comprehensive and sweeping changes to our lifestyles, and as soon as possible, or we’re just going to carry on as usual. I am a climate radical, a climate extremist. We need to stop burning fossil fuels NOW.

I’m fully signed up to the cause. I don’t own a car, am never getting on a plane again, have been recycling everything for 30 years. In the 1990s my wife helped launch The Forest Stewardship Council which promotes responsible management of the world’s forests. Last year we planted half a dozen trees in our back garden, along with as many butterfly and bee-friendly plants as we could fit in, and each year let it run wild to encourage insects, with the result that we get lots of birds. Trivial, insignificant stuff, I know, but the best I can do.

So maybe that’s why I wasn’t very interested in ‘the message’ of many of the works here – because I’ve been discussing, debating and embodying the same ‘messages’ for decades. With the result that I barely scanned the wall labels telling me how awful capitalism is, or how ruinous the oil industry is, or how the Amazon is being devastated etc etc, the kind of thing I’ve been reading and worrying about since the 1980s.

My pre-existing commitment to the cause freed me up to enjoy the works purely as works of art, judged solely by the impact they made on all my senses.

I can see what the various artists are aiming at, I can read what they wish the world was like, I understand their desire for a more caring and compassionate approach – to ourselves, to each other, and to the natural world around us. But that’s not what the world is like, that’s not what we’re like. We are horribly heedless and destructive. We have to face the facts and act accordingly.

Anyway this, the green environmentalist subject matter, is not why I liked this exhibition; I liked it because a lot of the art is really bold and impactful (and staged in big, calming, air-conditioned spaces).

Top works

As I mentioned, there are:

  • many excellent large photos – for example, of abandoned industrial plants by Richard Mosse (Ireland)
  • prints – for example, a series of X-rays of living organisms by Agnes Denes (Hungary)
  • big paintings – including a striking nude woman in a tribal style by Daiara Tukano

But what bowled me over were the installations.

1. ‘Memorial to Arcadia Woodlands Clear-Cut (Green, Violet, and Brown)’ by Andrea Bowers (2014)

The afore-mentioned ecofeminist Andrea Bowers made a big sculpture consisting of ropes or twines hanging from the ceiling, each ending with a fragment of wood. It’s entitled ‘Memorial to Arcadia Woodlands Clear-Cut (Green, Violet, and Brown)’. It commemorates a forest in California that Bowers attempted to save by climbing and tying herself to an oak tree alongside three other activists. The action failed to prevent the destruction of the pristine grove of trees and the protesters were arrested. Bowers later returned to the site, collecting the remaining wood chippings and connecting them with ropes and other tree-sitting gear to create this shrine. It is a ‘hanging sculpture’.

‘Memorial to Arcadia Woodlands Clear-Cut (Green, Violet, and Brown)’ by Andrea Bowers in ‘Dear Earth: Art and Hope in a Time of Crisis’ at the Hayward Gallery. Photo by Mark Blower. Courtesy of the Hayward Gallery

2. ‘we are opposite like that’ by Himali Singh Soin (2018 to 2019)

This is splendid. The space it’s in is dark, no lights. There is a big video screen but instead of hanging on a wall it is standing upright in a big square pool of something. Because it’s dark I wondered if it was oil, a protest against the oil industry etc, but a visitor assistant told me it’s water, flat, cold, completely black water. And so it reflects the action of the video above it. You sit on a bench and watch the video and watch its perfect reflection in the icy black water beneath.

The video itself is a haunting, slow-moving sequence of the artist appearing in various guises, sometimes wearing those foil protective suits against the cold, in Arctic or Antarctic landscapes. Reading the wall label you discover that it is Soin herself and she is playing Ice, an alien figure navigating a polar landscape speckled with coal mines. The film is based on the Victorian fears that a new ice age would advance across the world and consume the British Empire.

So, apparently the artist is reflecting on this colonial past and ‘the reparative possibilities of the Earth’s polar regions as they become increasingly vulnerable in the midst of climate change.’ Maybe. But just as striking as the imagery is the confrontationally modernistic soundtrack an original score (by David Soin Tappeser – any relation?) performed by a string quartet. Apparently the splintered, pointillist fragments are meant to denote the sounds of ice crystals, shifting ice platforms, an eerie, unhuman landscape.

Installation view of ‘we are opposite like that’ by Himali Singh Soin in ‘Dear Earth: Art and Hope in a Time of Crisis’ at the Hayward Gallery. Photo by Mark Blower. Courtesy of the Hayward Gallery

A photo can’t convey the impact of sitting in the dark, watching these beautiful images, hearing this jagged spooky music. There’s a video on YouTube of the artist introducing and explaining the piece, with a long extract starting at 3:44.

3. ‘Axis of Life and Vines in the Mountains’ by Aluaiy Kaumakan (2018)

Many of the rooms are such self-contained worlds or zones that they are separated by thick black curtains. You have to actively push through these to go from one artzone to another.

One of the best experiences in the show was pushing through some heavy black curtains into a big room to be confronted by this fabulous work, an enormous sculpture in multi-coloured fabric by Aluaiy Kaumakan. Kaumakan is not a rootless city-dweller but comes from a specific community within Taiwan. In 2009, a devastating typhoon forced the Indigenous Paiwan community to leave their mountain village in southern Taiwan. Kaumakan’s response to the disaster was to begin working collaboratively with other displaced women from her community, passing on the traditional Paiwan weaving techniques her mother had taught her. Apparently, the motifs and styles derives from Paiwan’s highly ornamented ceremonial dress, and Kaumakan combines natural fibres and recycled materials using the Paiwan technique of ‘lemikalik’, a process of binding fabric into cords looped in concentric circles.

This is all good to know but… wow! The piece is big and dramatic and strange and absorbing and mesmeric. I wandered off and came back twice, unable to tear myself away from its strange, and haunting power. Apparently, lemikalik can be translated as ‘intertwining’ and evokes both the joining of threads and the unbreakable bond between people and the land. I felt myself being drawn in, as in a science fiction film, into its strange, haunting, scary, huge, colourful world of skeins and ropes.

Installation view of ‘Axis of Life and Vines in the Mountains’ by Aluaiy Kaumakan in ‘Dear Earth: Art and Hope in a Time of Crisis’ at the Hayward Gallery. Photo by Mark Blower. Courtesy of the Hayward Gallery

4. ‘Green Screen’ by Hito Steyerl (2023)

You push through another set of thick, heavy, black curtains into a completely different world. The Kaumakan room is light and bright but next second you are in a room which is dark as a cinema. You are immediately confronted with a wall of what appear to be lightbulbs which are continually flashing ever-changing patterns of changing colours. There’s a bench to sit on and bean bags to slump on. I playfully asked the visitor assistant if the installation included drugs – obviously only natural, organic, environmentally-friendly drugs, things like peyote or mescaline. Apparently not. Shame. It’s screaming out for psychedelic enhancement.

Installation view of ‘Green Screen’ by Hito Steyerl in ‘Dear Earth: Art and Hope in a Time of Crisis’ at the Hayward Gallery. Photo by Mark Blower. Courtesy of the Hayward Gallery

But it is, obviously, not just a nightclub-style lightshow. It is an LED screen constructed from empty bottles and crates. When you go round the back you realise that plants, rubber plants, houseplants, are growing out of each of these bottles (‘a living wall of plants’). Now here’s the thing: bioelectrical signals from plants have been converted into the sounds and images displayed on the LED wall, with each bottle acting as a single pixel! So the ever-changing visual patterns (and the bleeps and tweeks which you hear) are generated by the living plants. Cool, eh.

5. Pabellón de Cristal I by Cristina Iglesi (2014)

Up the Brutalist concrete stairs you come across another wonder. This photo doesn’t do it justice.

Installation view of ‘Pabellón de Cristal I’ by Cristina Iglesi (2014) in ‘Dear Earth: Art and Hope in a Time of Crisis’ at the Hayward Gallery. Photo by Mark Blower. Courtesy of the Hayward Gallery

What happens is you walk up the concrete steps into something that resembles the steam room at my local gym, a square space with a (green) bench lining 3 sides and which you’re obviously meant to sit and rest on. But what makes it magical is the ‘floor’ is actually a metal grid under which is an uneven wrinkled brown surface, which looks like solidified lava flow, and across the multiple runnels and crevices of this surface is gurgling an abundance of real water. Actual flowing water, in an art gallery! The wall label gives a copious explanation:

The green glass room, benches and the grid floor affect the viewer’s perception of space, creating a sense of instability, while the increasing speed of the water draining away makes the passing of time more visible. Iglesias wants us to slow down and think about where we are standing. The land under our feet is an accumulation of different strata of rock and sediment, but also of layers of culture and memory, which are often overlooked. For the artist, consciousness of this stratification and how our planet is formed reveals our need to care for nature and the environment. ‘I want people to be aware that we’ve constructed the road and under that road, there’s a water system and there are also wider waters coming from deeper back in time,’ she explains.

Maybe. For me, as I mentioned, because the exhibition was incredibly empty meant that on the two separate occasions when I entered the Pabellon, I sat for a couple of minutes, I was completely alone. I put down my bag and notebook and pen and glasses and sat back against the green wall and closed my eyes and listened to the gurgling water and felt really, really chilled.

6. The Living Pyramid by Agnes Denes (2015/2024)

In one sense, the best is saved for last. Further along the corridor, you open double doors into the biggest display space in the Hayward, the Anna and Michael Zanni Gallery. And smack bang in the centre of this huge white open space, lit by skylights in the ceiling, sits the enormous Living Pyramid by Agnes Denes.

Installation view of ‘The Living Pyramid’ by Agnes Denes in ‘Dear Earth: Art and Hope in a Time of Crisis’ at the Hayward Gallery. Photo by Mark Blower. Courtesy of the Hayward Gallery

Denes is, apparently a leading pioneer of the environmental art movement, well known for creating outdoor works that engage with nature ever since the 1960s. She is perhaps best known for ‘Wheatfield – A Confrontation’ where she sowed, tended and harvested two acres of wheat on a landfill site beside the World Trade Centre in New York, and there are big colour photos of that and other similar works on the walls. But it’s obviously this dirty great pyramid lined with plants which grabs your attention.

The Living Pyramid was first shown in 2015 at Socrates Sculpture Park in New York and has become one of Denes’s iconic works, with versions appearing in Germany and Turkey. This is the first time it’s been shown indoors and this most recent iteration reaches five metres in height and showcases a flourishing selection of wildflowers and grasses. They include, for the gardeners among you, Calamagrostis, Deschampsia, Echinacea, Festuca, Helenium, Pennisetum, Rudbeckia and Veronica.

Obviously it’s meant to be saying something about the hierarchy of power in modern society and is probably a statement against capitalism or some such – but it’s also just a really impressive, big artefact, makes a awesome impression on the senses, is amusing and uplifting to walk around or to go up close and examine the plants.

However, at this point you notice something quite ironic, which is that quite a few of these carefully spaced and arranged plants are dying. I asked the visitor assistant if they’re getting enough water, because the soil around them (lovely compost-y soil, not like the heavy London clay soil in my garden) seemed very dry. This led him to tell me that the curators did at one point consider putting the whole thing outside, on the terrace just outside the Anna and Michael Zanni Gallery. That way it would have got natural sunlight and the showers which we’ve been getting here in London recently. He doesn’t know why they decided to stick it inside. There are skylights in the ceiling of the gallery, so the plants get some daylight but, by the looks of things, not enough. And not enough water.

I don’t know whether Denes intended this, for her work to be a pyramid of dying plants? Is that deliberate? Some kind of irony? It certainly raises the problem of creating works of art about ‘nature’ and displaying them in any art gallery because art galleries must be among the most sterile, antiseptic locations in the modern world. Clean, dry, air-conditioned and antiseptic in the highest degree to ensure the complete safety of priceless works of art.

Nature is dirty, messy, full of animals crapping everywhere, fungi and mould and spores and insects eating away at wood and dirty, unhygienic ecosystems everywhere you look. There is a profound contradiction between the messy world of nature and the spic and span world of art. This exhibition goes further than others I’ve been to, to try and address this gap. The very first display is a dirty great big fallen tree incorporated into a sculpture by Otobong Nkanga. But it is, characteristically, dead.

Installation view of ‘The Trifurcation’ by Otobong Nkanga (2023) in ‘Dear Earth: Art and Hope in a Time of Crisis’ at the Hayward Gallery. Photo by Mark Blower. Courtesy of the Hayward Gallery

I loved the Pabellón de Cristal with its real water, but the surface it was swirling across was completely lifeless resin moulding. The bottle bank LED had plants in it, but they weren’t the thing you noticed.

Anyway, the apparent ‘failure’ of the Living Pyramid highlights questions the ability of art to be genuinely fertile and full of life. Must art always be sterile and arid?

Videos

In addition to the wonderful Himali Singh Soin video, there are at least three other videos, all projected onto huge screens and so immersive experiences in their own right. Two stood out:

Grid (Palimi-ú) by Richard Mosse

In a big darkened room is a very widescreen projection of a series of poignant speeches by Yanomami people recorded on analogue 35mm infrared film in the village of Palimi-ú, near the Brazil-Venezuela border. On the wall adjacent is projected a series of images, multispectral photographs captured by drones flying over sites of environmental crimes in the rainforest. The aim is to’ document the impact of illegal mining and agribusiness in the Amazon’. Alas, the Amazon.

THE FUTURE (Sixes and Sevens) by Cornelia Parker (2023)

This is one of the seven works commissioned specially for this exhibition. In a darkened room are two massive video screens on which are projected primary school children answering questions about what they imagine their future will be like. After a while you realise the two screens are showing different kids answering the same question or raising other thoughts. In other words, out of this simply material is created a kind of polyphony. (The title is a reference to the very famous [if you’re me and Cornelia’s age] 1964 TV documentary ‘Seven Up!’ in which 7-year-olds were asked what they wanted to be when they grew up.) Watching kids is sweet and touching and maybe speaks to the exhibition’s theme of care and compassion. Doesn’t get us off the hook of doing something, though – doing something radical, now.

Installation view of ‘THE FUTURE (Sixes and Sevens)’ by Cornelia Parker in ‘Dear Earth: Art and Hope in a Time of Crisis’ at the Hayward Gallery. Photo by Mark Blower. Courtesy of the Hayward Gallery

Last tweet

Outside on the terrace are two works by the American artist Jenny Kendler. One is the rather scary sculpture, ‘Birds Watching III’, made up of paintings of the eyes of one hundred bird species that are threatened by the climate crisis. They are printed onto the reflective material used for traffic signs to give a sheeny, reflective and spooky effect.

More user friendly, child friendly, even, is the piece, ‘Tell it to the Birds’. This consists of half a ball or drum erected on a tripod and which you lean into to discover a microphone sitting nestled among a bed of foam. The idea is that you should say something into the microphone and… instead of your voice booming out across the rooftops, a savvy software ‘translates’ your words into birdsong. the software contains the calls of a load of endangered bird species and whatever you say will be ‘converted’ into tweets and calls. To quote the wall label:

These songs are broadcast for all to hear, yet only the speaker knows their true meaning. Driven by a desire to ‘re-enchant’ our relationship with the natural world, Kendler asks us to imagine what interspecies communication could sound like.

Installation view of ‘Tell it to the Birds’ by Jenny Kendler in ‘Dear Earth: Art and Hope in a Time of Crisis’ at the Hayward Gallery. You can see ‘Birds Watching III’ reflected in the window. Photo by Mark Blower. Courtesy of the Hayward Gallery

Obviously this is nothing whatsoever like what ‘interspecies communication could sound like’ but it’s a fun way to end a wonderfully inventive, big, immersive and enthralling exhibition. I can’t recommend it highly enough.

What can I do?

A few years ago UN Climate Envoy Christiana Figueres made a short list of things everyone should do, must do, right now:

  • give up meat
  • give up dairy
  • sell your car
  • never fly again
  • move any savings or investments you have from fossil fuel-supporting companies to sustainable, decarbonised investments

And plant trees. Lots and lots of trees. How many of these have you done? How many of these has anybody done?


Related links

Other Hayward Gallery reviews

The Diversity of Life by E.O. Wilson (1992)

It is a failing of our species that we ignore and even despise the creatures whose lives sustain our own. (p.294)

Edward Osborne Wilson was born in 1929 and pursued a long career in biology, specialising in myrmecology, the study of ants, about which he came to be considered the world’s leading expert, and about which he published a massive textbook as well as countless research papers.

As well as his specialist scientific writing, Wilson has also published a series of (sometimes controversial) books about human nature, on collaborative species of animal (which led him to conceive the controversial theory of sociobiology), and about ecology and the environment.

(They’re controversial because he considers humans as just another complex life form, whose behaviour is dictated almost entirely by genetics and environment, discounting our ability to learn or change: beliefs which are opposed by liberals and progressives who believe humans can be transformed by education and culture.)

The Diversity of Life was an attempt to give an encyclopedic overview of life on earth – the myriads of life forms which create the dazzlingly complicated webs of life at all levels and in all parts of our planet – and then to inform the reader about the doleful devastation mankind is wreaking everywhere – and ends with some positive suggestions about how to try & save the environment, and the staggering diversity of life forms, before it’s too late.

The book is almost 30 years old but still so packed with information that maybe giving a synopsis of each chapter would be useful.


Part one – Violent nature, resilient life

1. Storm over the Amazon An impressionistic memoir of Wilson camping in the rainforest amid a tropical storm, which leads to musings about the phenomenal diversity of life forms in such places, and beyond, in all parts of the earth, from the Antarctic Ocean to deep sea, thermal vents.

2. Krakatau A vivid description of the eruption of Krakatoa leads into an account of how the sterile smoking stump of island left after the explosion was swiftly repopulated with all kinds of life forms within weeks of the catastrophe and now, 130 years later, is a completely repopulated tropical rainforest. Life survives and endures.

3. The Great Extinctions If the biggest volcanic explosion in recorded history can’t eliminate life, what can? Wilson explains the five big extinction events which the fossil record tells us about, when vast numbers of species were exterminated:

  • Ordovician 440 million years ago
  • Devonian 365 million years ago
  • Permian 245 million years ago
  • Triassic 210 million years ago
  • Cretaceous 66 million years ago

The last of these being the one which – supposedly – wiped out the dinosaurs, although Wilson points out that current knowledge suggests that dinosaur numbers were actually dropping off for millions of years before the actual ‘event’, whatever that was (most scientists think a massive meteor hit earth, a theory originally proposed by Luis Alvarez in 1980).

Anyway, the key thing is that the fossil record suggests that it took between five and 20 million years after each of these catastrophic events for the diversity of life to return to something like its pre-disaster levels.


Part two – Biodiversity rising

4. The Fundamental Unit A journey into evolutionary theory which quickly shows that many of its core concepts are deeply problematic and debated. Wilson clings to the notion of the species as the fundamental unit, because it makes sense of all biology –

A species is a population whose members are able to interbreed freely under natural conditions (p.36)

but concedes that other biologists give precedence to other concepts or levels of evolution, for example the population, the deme, or focus on genetics.

Which one you pick depends on your focus and priorities. The ‘species’ is a tricky concept to define, with the result that many biologists reach for subspecies (pp.58-61).

And that’s before you examine the record chronologically i.e. consider lineages of animals which we know stretch back for millions of years: at what point did one species slip into another? It depends. It depends what aspects you choose to focus on – DNA, or mating rituals, or wing length or diet or location.

The message is that the concepts of biology are precise and well-defined, but the real world is far more messy and complicated than, maybe, any human concepts can really fully capture.

5. New Species Wilson details all the processes by which new species have come about, introducing the concept of ‘intrinsic isolating mechanisms’, but going on to explain that these are endless. Almost any element in an environment, an organisms’s design or DNA might be an ‘isolating mechanism’, in the right circumstances. In other words, life forms are proliferating, mutating and changing constantly, all around us.

The possibility for error has no limit, and so intrinsic isolating mechanisms are endless in their variety. (p.51)

6. The forces of evolution Introduces us to a range of processes, operating at levels from genetics to entire populations, which drive evolutionary change, including:

  • genetic mutation
  • haploidy and diploidy (with an explanation of the cause of sickle-cell anaemia)
  • dominant and recessive genes
  • genotype (an individual’s collection of genes) and phenotype (the set of observable characteristics of an individual resulting from the interaction of its genotype with the environment)
  • allometry (rates of growth of different parts of an organism)
  • microevolution (at the genetic level) and macroevolution (at the level of environment and population)
  • the theory of punctuated equilibrium proposed by Niles Eldredge and Stephen Jay Gould (that evolution happens in burst followed by long periods of no-change)
  • species selection

7. Adaptive radiation An explanation of the concepts of adaptive radiation and evolutionary convergence, taking in Hawaiian honeycreepers, Darwin’s finches on the Galapagos Islands, the cichlid fish of Lake Victoria, the astonishing diversity of shark species, and the Great American Interchange which followed when the rise of the Panama Isthmus joined previously separated North and South America 2.5 million years ago.

Ecological release = population increase that occurs when a species is freed from limiting factors in its environment.

Ecological constraint = constriction in the presence of a competitor.

8. The unexplored biosphere Describes our astonishing ignorance of how many species there are in the world. Wilson gives the total number of named species as 1.4 million, 751,000 of them insects, but the chapter goes on to explain our complete ignorance of the life forms in the ocean depths, or in the rainforest canopies, and the vast black hole of our ignorance of bacteria.

There could be anything between 10 million and 100 million species on earth – nobody knows.

He explains the hierarchy of toxonomy of living things: kingdom, phylum or division, class, order, family, genus, species.

Equitability = the distribution of diversity in a given location.

9. The creation of ecosystems Keystone species hold a system together e.g. sea otters on the California coast (which ate sea urchins thus preventing the sea urchins eating the kelp, so giving rise to forests of kelp which supported numerous life forms including whales who gave birth close to the forests of kelp) or elephants in the savannah (who, by pushing over trees, create diverse habitats).

Elasticity.

The predator paradox – in many systems it’s been shown that removing the top predator decreases diversity).

Character displacement. Symbiosis. The opposite of extinction is species packing.

The latitudinal diversity gradient i.e. there is more diversity in tropical rainforests – 30% of bird species, probably over half of all species, live in the rainforests – various theories why this should be (heat from the sun = energy + prolonged rain).

10. Biodiversity reaches the peak The reasons why biodiversity has steadily increased since the Cambrian explosion 550 million years ago, including the four main steps in life on earth:

  1. the origin of life from prebiotic organic molecules 3.9 billion years ago
  2. eukaryotic organisms 1.8 billion years ago
  3. the Cambrian explosion 540 to 500 million years ago
  4. the evolution of the human mind from 1 million to 100,000 years ago.

Why there is more diversity, the smaller the creatures/scale – because, at their scale, there are so many more niches to make a living in.


Part three – The human impact

It’s simple. We are destroying the world’s ecosystems, exterminating untold numbers of species before we can even identify them and any practical benefits they may have.

11. The life and death of species ‘Almost all the species that have ever lived are extinct, and yet more are alive today than at any time in the past (p.204)

How long do species survive? From 1 to 10 million years, depending on size and type. Then again, it’s likely that orchids which make up 8% of all known flowering plants, might speciate, thrive and die out far faster in the innumerable microsites which suit them in mountainous tropics.

The area effect = the rise of biodiversity according to island size (ten times the size, double the number of species). Large body size means smaller population and greater risk of extinction. The metapopulation concept of species existence.

12. Biodiversity threatened Extinctions by their very nature are rarely observed. Wilson devotes some pages to the thesis that wherever prehistoric man spread – in North America 8,000 years ago, in Australia 30,000 years ago, in the Pacific islands between 2,000 and 500 years ago – they exterminated all the large animals.

Obviously, since then Western settlers and colonists have been finishing off the job, and he gives depressing figures about numbers of bird, frog, tree and other species which have been exterminated in the past few hundred years by Western man, by colonists.

And now we are in a new era when exponentially growing populations of Third World countries are ravaging their own landscapes. He gives a list of 18 ‘hotspots’ (New Caledonia, Borneo, Ecuador) where half or more of the original rainforests has been heart-breakingly destroyed.

13. Unmined riches The idea that mankind should place a cash value on rainforests and other areas of diversity (coral reefs) in order to pay locals not to destroy them. Wilson gives the standard list of useful medicines and drugs we have discovered in remote and unexpected plants, wondering how many other useful, maybe life-saving substances are being trashed and destroyed before we ever have the chance to discover them.

But why  should this be? He explains that the millions of existing species have evolved through uncountable trillions of chemical interactions at all levels, in uncountably vast types of locations and settings – and so have been in effect a vast biochemical laboratory of life, infinitely huger, more complex, and going on for billions of years longer than our own feeble human laboratory efforts.

He gives practical examples of natural diversity and human narrowness:

  • the crops we grow are a handful – 20 or so – of the tens of thousands known, many of which are more productive, but just culturally alien
  • same with animals – we still farm the ten of so animals which Bronze Age man domesticated 10,000 years ago when there is a world of more productive animals e.g. the giant Amazon river turtle, the green iguana, which both produce far more meat per hectare and cost than beef cattle
  • why do we still fish wild in the seas, devastating entire ecosystems, when we could produce more fish more efficiently in controlled farms?
  • the absolutely vital importance of maintaining wild stocks and varieties of species we grow for food:
    • when in the 1970s the grassy-stunt virus devastated rice crops it was only the lucky chance that a remote Indian rice species contained genes which granted immunity to the virus and so could be cross-bred with commercial varieties which saved the world’s rice
    • it was only because wild varieties of coffee still grew in Ethiopia that genes could be isolated from them and cross-bred into commercial coffee crops in Latin America which saved them from devastation by ‘coffee rust’
  • wipe out the rainforests and other hotspots of diversity, and there go your fallback species

14. Resolution As ‘the human juggernaut’ staggers on, destroying all in its path, what is to be done? Wilson suggests a list:

  1. Survey the world’s flora and fauna – an epic task, particularly as there are maybe only 1,500 scientists in the whole world qualified to do it
  2. Create biological wealth – via ‘chemical prospecting’ i.e. looking for chemicals produced by organisms which might have practical applications (he gives a list of such discoveries)
  3. Promote sustainable development – for example strip logging to replace slash and burn, with numerous examples
  4. Wilson critiques the arguments for
    • cryogenically freezing species
    • seed banks
    • zoos
  5. They can only save a tiny fraction of species, and then only a handful of samples – but the key factor is that all organisms can only exist in fantastically complicated ecosystems, which no freezing or zoosor seed banks can preserve. There is no alternative to complete preservation of existing wilderness

15. The environmental ethic A final summing up. We are living through the sixth great extinction. Between a tenth and a quarter of all the world’s species will be wiped out in the next 50 years.

Having dispensed with the ad hoc and limited attempts at salvage outlined above, Wilson concludes that the only viable way to maintain even a fraction of the world’s biodiversity is to identify the world’s biodiversity ‘hot spots’ and preserve the entire ecosystems.

Each ecosystem has intrinsic value (p.148)

In the last few pages he makes the ‘deepest’ plea for conservation based on what he calls biophilia – this is that there is all kinds of evidence that humans need nature: we were produced over 2 million years of evolution and are descended from animals which themselves have encoded in the genes for their brains and nervous systems all kinds of interactions with the environment, with sun and moon, and rain and heat, and water and food, with rustling grasses and sheltering trees.

The most basic reason for making heroic efforts to preserve biodiversity is that at a really fundamental level, we need it to carry on feeling human.

On planet, one experiment (p.170)


Conclusion

Obviously, I know human beings are destroying the planet and exterminating other species at an unprecedented rate. Everyone who can read a newspaper or watch TV should know that by now, so the message of his book was over-familiar and sad.

But it was lovely to read again several passages whose imaginative brio had haunted me ever since I first read this book back in 1994:

  • the opening rich and impressionistic description of the rainforest
  • a gripping couple of pages at the start of chapter five where he describes what it would be like to set off at walking pace from the centre of the earth outwards, across the burning core, then into the cooler mantle and so on, suddenly emerging through topsoil into the air and walking through the extraordinary concentration of billions of life forms in a few minutes – we are that thin a layer on the surface of this spinning, hurtling planet
  • the couple of pages about sharks, whose weird diversity still astonishes
  • the brisk, no-nonsense account of how ‘native’ peoples or First Peoples were no tender-hearted environmentalists but hunted to death all the large megafauna wherever they spread
  • the dazzling description of all the organisms which are found in just one pinch of topsoil

As to the message, that we must try and preserve the diversity of life and respect the delicate ecosystems on which our existence ultimately depends – well, that seems to have been soundly ignored more or less everywhere, over the past thirty years since the book was published.

Credit

The Diversity of Life by Edward O. Wilson was published by the Harvard University Press in 1992. All references are to the 1994 Penguin paperback edition.


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