On the ethics of eating.

On the ethics of eating.

Every living thing needs energy.  But our world is finite.  Energy has to come from somewhere.

Luckily, there’s a lot of potential energy out there in the universe.  For instance, mass can be converted into energy.  Our sun showers us with energy drawn from the cascade of nuclear explosions that transpire in its core. A tiny difference in mass between merging hydrogen atoms and the resultant helium atom allows our sun to shine.

Our sun radiates about 10^26 joules per second (which is 100,000 times more than the combined yearly energy usage from everyone on Earth), but only a fraction of that reaches our planet.  Photons radiate outward from our sun in all directions, so our planet intercepts only a small sliver of the beam.  Everything living here is fueled by those photons.

When living things use the sun’s energy, we create order – a tree converts disordered air into rigid trunk, a mouse converts a pile of seeds into more mouse, a human might convert mud and straw into a house.  As we create order, we give off heat.  Warming the air, we radiate infrared photons.  That’s what night vision goggles are designed to see.  The net effect is that the Earth absorbs high-energy photons that were traveling in a straight beam outward from the sun … and we convert those photons into a larger number of low-energy photons that fly off every which way.

We the living are chaos machines.  We make the universe messier.  Indeed, that’s the only way anything can live.  According to the Second Law of Thermodynamics, the only processes that are sufficiently probable so as to occur are those that make the world more random.

We’re lucky that the universe started out as such a bland, orderly place – otherwise we might not even be able to tell “before” from “later,” let alone extract enough energy to live.

Dog!

The earliest living things took energy from the sun indirectly – they used heat, and so they were fueled by each photon’s delivery of warmth to the Earth.  (Please allow me this little hedge – although it’s true that the earliest life was fueled only by warmth, that warmth might not have come from the sun.  Even today, some thermophilic bacteria live in deep sea vents and bask in the energy that leaks from our Earth’s molten core.  The earliest life might have lived in similar nooks far from the surface of the Earth.  But early life that resided near the surface of the seas seems more likely. Complicated chemical reactions were necessary to form molecules like RNA.  Nucleic acids were probably first found in shallow, murky pools pulsed with lightning or ultraviolet radiation.)

Over time, life changed.  Organisms create copies of themselves through chemical processes that have imperfect fidelity, after all.  Each copy is slightly different than the original.  Most differences make an organism worse than its forebears, but, sometimes, through sheer chance, an organism might be better at surviving or at creating new copies of itself.

When that happens, the new version will become more common. 

Over many, many generations, this process can make organisms very different from their forebears.  When a genome is copied prior to cell division, sometimes the polymerase will slip up and duplicate a stretch of code.  These duplication events are incredibly important for evolution – usually, the instructions for proteins can’t drift too far because any change might eliminate essential functions for that cell.  If there’s a second copy, though, the duplicate can mutate and eventually gain some new function.

About two billion years ago, some organisms developed a rudimentary form of photosynthesis.  They could turn sunlight into self!  The energy from our sun’s photons was used to combine carbon dioxide and water into sugar. And sugar can be used to store energy, and to build new types of structures.

Photosynthesis also releases oxygen as a biproduct.  From the perspective of the organisms living then, photosynthesis poisoned the entire atmosphere – a sudden rise in our atmosphere’s oxygen concentration caused many species to go extinct.  But we humans never could have come about without all that oxygen.

Perhaps that’s a small consolation, given that major corporations are currently poisoning our atmosphere with carbon dioxide.  Huge numbers of species might go extinct – including, possibly, ourselves – but something else would have a chance to live here after we have passed.

In addition to poisoning the atmosphere, photosynthesis introduced a new form of competition.  Warmth spreads diffusely – on the early Earth, it was often sheer chance whether one organism would have an advantage over any other.  If you can photosynthesize, though, you want to be the highest organism around.  If you’re closer to the sun, you get the first chance to nab incoming photons.

That’s the evolutionary pressure that induced plants to evolve.  Plants combined sugars into rigid structures so that they could grow upwards.  Height helps when your main goal in life is to snatch sunlight.

Animation by At09kg on Wikipedia.

Nothing can live without curtailing the chances of other living things.  Whenever a plant absorbs a photon, it reduces the energy available for other plants growing below.

Plants created the soil by trapping dirt and dust, and soil lets them store water for later use.  But there is only so much desalinated water.  Roots reach outward: “I drink your milkshake!”, each could exclaim.

For a heterotroph, the brutality of our world is even more clear.  Our kind – including amoebas, fungi, and all animals – can only survive by eating others.  We are carbon recyclers.  Sugar and protein refurbishers.  We take the molecular machines made by photosynthesizing organisms … chop them apart … and use the pieces to create ourselves.

Some heterotrophs are saprophages – eaters of the dead.  But most survive only by destroying the lives of others.

For the earliest heterotrophs, to eat was to kill.  But, why worry?  Why, after all, is life special?  Each photosynthesizing organism was already churning through our universe’s finite quantity of order in its attempt to grow.  They took in material from their environment and rearranged it.  So did the heterotrophs – they ingested and rearranged. Like all living things, they consumed order and excreted chaos.

The heterotrophs were extinguishing life, but life is just a pattern that repeats itself.  A living thing is a metabolic machine that self-copies.  From a thermodynamic perspective, only the energetics of the process distinguish life from a crystal.  Both are patterns that grow, but when a crystal grows, it makes matter more stable than its environment – life makes matter less stable as it’s incorporated into the pattern.

Your ability to read this essay is a legacy of the heterotrophs’ more violent descendants.  The earliest multicellular heterotrophs were filter feeders – they passively consumed whatever came near.

But then, between 500 and 600 million years ago, animals began to hunt and kill.  They would actively seek life to extinguish.  To do this, they needed to think – neurons first arose among these hunters.

Not coincidentally, this is also the time that animals first developed hard shells, sharp spines, armored plates – defenses to stop others from eating them.

The rigid molecules that allow plants to grow tall, like cellulose, are hard to digest.  So the earliest hunters probably began by killing other animals.

With every meal, you join the long legacy of animals that survived only by extinguishing the lives of others.  With every thought, you draw upon the legacy of our forebear’s ruthless hunt.

Even if you’re vegan, your meals kill.  Like us, plants have goals.  It’s a matter of controversy whether they can perceive – perhaps they don’t know that they have goals – but plants will constantly strive to grow, to collect sunlight and water while they can, and many will actively resist being eaten.

But it makes no sense to value the world if you don’t value yourself.  Maybe you feel sad that you can’t photosynthesize … maybe you’d search out a patch of barren, rocky ground so that you’d absorb only photons that would otherwise be “wasted” … but, in this lifetime, you have to eat.  Otherwise you’d die.  And I personally think that any moral philosophy that advocates suicide is untenable.  That’s a major flaw with utilitarianism – rigid devotion to the idea of maximizing happiness for all would suggest that you, as another organism that’s taking up space, constantly killing, and sapping our universe’s limited supply of order, simply shouldn’t be here.

At its illogical extreme, utilitarianism suggests that either you conquer the world (if you’re the best at feeling happy) or kill yourself (if you’re not).

We humans are descended from carnivores.  Our ancestors were able to maintain such large brains only by cooking and eating meat.  Our bodies lack an herbivore’s compliment of enzymes that would allow us to convert grass and leaves into the full compliment of proteins that we need.

And we owe the very existence of our brains to the hunts carried out by even more ancient ancestors.  If they hadn’t killed, we couldn’t think.

Just because we were blessed by a legacy of violence, though, doesn’t mean we have to perpetuate that violence.  We can benefit from past harms and resolve to harm less in the present and future.

Writing was first developed by professional scribes.  Scientific progress was the province of wealthy artisans.  None of the progress of our culture would have been possible if huge numbers of people weren’t oppressed – food that those people grew was taken from them and distributed by kings to a small number of privileged scribes, artisans, philosophers, and layabouts. 

When humans lived as hunters and gatherers, their societies were generally equitable.  People might die young from bacterial infections, dehydration, or starvation, but their lives were probably much better than the lives of the earliest farmers.  After we discovered agriculture, our diets became less varied and our lives less interesting.  Plus, it’s easier to oppress a land-bound farmer than a nomadic hunter.  Stationary people paid tribute to self-appointed kings.

This misery befell the vast majority of our world’s population, and persisted for thousands of years.  But the world we have now couldn’t have come about any other way.  It’s horrific, but, for humans to reach our current technologies, we needed oppression.  Food was taken from those who toiled and given to those who hadn’t. 

Mostly those others created nothing of value … but some of them made writing, and mathematics, and rocket ships.

Although the development of writing required oppression, it’s wrong to oppress people now.  It was wrong then, too … but we can’t go back and fix things.

Although the origin of your brain required violence, I likewise think we ought to minimize the violence we enact today.  We can’t help all the animals who were hurt in the long journey that made our world the place it is now.  And we can’t stop killing – there’s no other way for heterotrophs like us to live.

To be vegan, though, is to reckon with those costs.  To feel a sense of wonder at all the world pays for us to be here.  And, in gratitude, to refrain from asking that it pay more than we need.

On perspective.

On perspective.

In fantasy novels, trees walk upon their roots and battle with their limbs.  That makes sense to me.  If I think about two trees interacting, I consider the branches; the taller tree shades the other, limiting its competitor’s growth.

But my perspective is upside down.  Trees are standing on the sky, reaching for one another through the earth.  They listen underground.  They communicate down there, passing messages to one another, or even meals.

Picture from “The Wood Wide Web” on New Zealand Geographic.

Perhaps their branches grope for sunlight in the unconscious way that my kids’s feet seek warmth like homing missiles while they sleep.  I try to roll over only to find somebody’s toes wedged under my back.

Year by year, trees inch their feet toward the sun.  And their engaging social lives are hidden from me, buried underground.  My reflexive perspective gives me an inverted image of a tree’s world.

I’m surely not alone in this misunderstanding. 

We humans hold our heads high as we walk across the ground.  A major source of tension in human evolution was arranging our skeletons in such a way that we could walk upright without too many women dying in childbirth – our posture constrains the shape of the pelvis.

Although some species do exhibit dramatically different body morphs between males and females, it’s more common for evolutionary changes in one sex to diffusely alter the other.  Club-winged manakins have bones that are more dense than other birds, which makes them worse at flyingAll club-winged manakins fly poorly, male and female, even though only the males use their dense bones to produce mate-luring music.  Or consider the orgasms and nipples of Homo sapiens, which fulfill important biological purposes in one sex, and serve as a vestigial source of fun for the other.

In prehistoric times, men and women probably hunted together.  The evidence is especially compelling for human populations like the Neanderthal in southern Europe, who lived in such small groups that they would be unable to kill large prey without help from everyone in the group.  But even if prehistoric men had hunted alone, their upright stance and endurance running would have introduced an evolutionary pressure constricting the width of a human pelvis.

Our ancestors first descended from the trees to scavenge meat from lions’ kills.  Eventually, they began to hunt.  Their strategy was to exhaust and bewilder their prey, hoping to use the local geography to assist in each kill.  Mammoths were more likely to fall to their deaths than be slain by hurled spears; mounds of butchered bones accumulated at the base of particularly useful cliffs.

The high caloric density of cooked meat allowed our brains to expand … but the embrace of hunting also caused more women to die in childbirth.

And, less tragically, our upright posture distorts our understanding of the trees that once harbored our communities.  After all, we live in our heads.  It seemed sensible to us that the most interesting life of a tree would transpire in its loftiest branches.

Our biology doesn’t force us to view the world a certain way, but it dictates which perspectives are easiest to take.

Because our brains are story-generating organs, human cultures invariably see time as flowing uniformly in a single direction.  But for subatomic particles, time appears to be symmetrical; the Feynman diagram of an interaction would appear perfectly plausible progressing either forward or backward.

Only our universe’s progression toward greater entropy, i.e. randomness, seems to introduce a directionality for time’s arrow.  But there’s no a priori reason to expect a world to progress toward higher entropy.  This directionality seems to exist only because our particular universe happened to be in an unstable, low entropy state shortly after the Big Bang.

Image from ESA/Hubble.

Or so say most physicists.  From my perspective, I’m content assuming that the past is fixed but the future is mutable.  If I didn’t believe in that asymmetry – whether it’s real or not – I’d probably lapse into despair.

But, again, even if we accept that time is flowing, our perspective alters how we feel about that change.

Is the flow of time progress or decline?

Are a tree’s branches its hands or its feet?

In Indian mythology, time is cyclical, but within each cycle it flows toward corruption.  Time passes and the world grows worse.  Currently we are trapped within a Kali Age, the worst possible world, knowing that all the great heroes have passed.  We are just biding our time before the world can be destroyed and made good again.

After the sunder, time will once again cause that new world’s gleam to fade.  Nothing can stave off the encroach of rot.

In Judaism, the ancient sages lived longer than we do, and knew more, too.  At one point in time, a pair of humans were good: before long, we disobeyed the whims of God and were exiled from paradise.

In The Book of Shem, David Kishik writes that

To be original means to linger by the origin and insist on it.  The task is to avoid the progression toward a future or an end, and to stop the narrative before it develops any further.  In this sense, and in this sense only, the origin is a worthwhile goal.  Hence in Hebrew forward (kadima) is related to what is ancient (kadum), just as backward (achora) is linked to what is last (acharon).

Many humans want to reclaim the imagined glories of the past.

To make America great again, perhaps.

I personally think that many recent technological developments in our world are bad.  We’ve designed distracting, addicting telephones, and we’re putting them into the hands of children.  Our brains evolved to be extremely plastic, which let our species adapt to a wide variety of circumstances … but this neural plasticity allows exposure to fabulous, drug-like devices to dramatically alter our brains, probably for the worse.

And we’ve designed distracting, addicting advertising platforms – these siphon huge amounts of money away from productive industries, and the perverse economic incentives we’ve constructed allow these companies, alongside equally-unhelpful investment banks, to lure many of the most clever college graduates to their ranks.

But I’m certainly no Luddite, pining for a purer past.  The world was a terrible place for so many people.  Although I appreciate the thesis that Yuval Noah Harari presents in Sapiens – that the invention of agriculture made people’s lives worse than when all humans were hunters and gatherers – I see those grim millennia as akin to the hump in a chemical reaction, a transition that must be traversed in order to reach the desired products.

For generations, most people scraped out a miserable existence by subsistence farming.  Their lives were worse than their ancestors’.  But we, now, can feed so many people so easily that we could make our world into a paradise.

We’re not doing it, but we could.

At least we’re making baby steps toward a society in which people aren’t punished for their genetic background, or gender, or religious beliefs.  I mean, even in the United States we still treat women shabbily; across the country, racist police departments beleaguer Black citizens; atheists and Muslims are eyed with distrust.

But it used to be worse.

And, sure, even if we were the best of stewards, our planet would eventually be doomed.  Even if we don’t exhaust the resources here on Earth, the sun will run out of energy and bloat to engulf our world in a ball of fire.  Maybe that’s fine.  Death is a part of my life; perhaps I should look upon extinction as a natural part of humanity’s journey through time.

But it’s so cool to image people someday spreading amongst the stars.  I dream about the future.  And hope against hope – despite overpopulation, climate change, and all – that my children will find a better world than the one I’ve been living in.

Image by D Mitriy.

From my perspective, time will let us make the world better. 

Although it surely won’t happen on its own.  We will have to work to make it better.  The work might not be that hard.  Just live the way you would if the world were already the place it ought to be.

On two degrees and the worst year (yet) to be alive.

On two degrees and the worst year (yet) to be alive.

The United States is pumping more carbon dioxide into the atmosphere than we were last year.

The amount of heat-trapping gas in our atmosphere is already too high – ideally, our net emissions should be negative.  Which is entirely feasible.  When we cultivate forests, trees pull carbon from the air.  But each tree can do only so much.  We also need to reduce the amount of energy we consume.

We don’t need to be less happy, though.  As the economy improved, people began flying more … but many flights aren’t producing happiness.  Most people look harried and sullen in airports.  If we all switched to taking trains, the cultural expectations for the rhythm of our lives would shift – instead of short bursts of misery, our travels could be pleasant spells of intermediate time. 

And the giant server farms needed to run websites like Facebook gobble energy.  Facebook, just like any other advertising company, profits by making people less happy.  Many people would be happier in a world where these servers used less energy.

We have a compelling reason to change our behaviors.  If we don’t, the global climate will rise by two degrees Celsius or more.  (Of course, any individual location could become much warmer or colder – a nearby warm ocean current keeps Europe’s climate mild, but if melting polar ice redirects this current, countries like England could become quite frigid.)

How different might life be if global temperatures changed by two degrees?

In the year 536, global temperatures were about two degrees lower than they are today.  (Which does prove, obviously, that the global climate can change for reasons that are not humanity’s fault.  But the current changes are caused by us.)

Historian and archaeologist Michael McCormick believes that this two degree change in temperature made our planet an utterly miserable place to live. A volcanic eruption had darkened the sky, preventing incoming sunlight from warming Earth.  “It was the beginning of one of the worst periods to be alive, if not the worst year,” says McCormick. Snow fell in summertime; crops failed; people starved.

And now we, in all our wisdom, are about to tug the needle just as far (if not farther!) in the other direction.

The Dark Ages were literally dark.  Ashen clouds lurked overhead.  Beset by such nightmarish conditions, people feared that God had forsaken them.  Europeans abandoned science and literacy partly as penance, hoping to appease the source of wrath that was killing them and their children.

Plants have evolved on Earth for many millions of years.  Many plant species will find a way to endure even if we change our planet’s climate.  But human food crops are quite young, in evolutionary terms, and exist in precarious swaths of monoculture. A two degree increase in global temperatures will cause these plants to die.  Famine will ensue.  Global violence and warfare will increase as hungry people fight to survive. 

A two degree change in temperature is totally sufficient to usher in a new worst year to be alive.

Sadly, nobody will be eating any Doritos made from these drought-scorched corn plants.

If we change the global climate by two degrees, there’s also no assurance that our planet won’t keep warming.  Weather is dictated by complex feedback loops that we don’t yet understand.  Our oceans soak up heat, which is changing their chemistry; warmer water takes up more space, flooding the coasts, and will melt the polar ice caps from underneath, which further accelerates warming because ice reflects sunlight, but bare ground or water absorbs it.

Venus may have been habitable, once. But climate change spiraled out of control after the atmosphere filled with too much heat-trapping carbon dioxide.  The oceans evaporated.  Now, searing sulfuric acid falls as rain from the sky.

If we tip over the precipice, every living creature on earth will be doomed.  No one understands enough about the feedback loops that dictate a planet’s climate to know how close to the precipice we are.

Although, really, a two degree change would be awful enough.

Which is worth reiterating … especially because the cohort of humans that has contributed most to climate change, and currently holds the wealth and political power needed to prevent catastrophe, is of an age that perhaps they want the world to be a little warmer.  Wealthy Americans in their fifties to seventies have long migrated south in pursuit of warmer climate.

The current generation of 50- to 70-year-olds was given the most of the Earth’s plenitude.  The world of their youth was very different from the world in which my children were born. While that generation was alive, insect populations plummeted by 90% or more.  The fecundity of other wildlife diminished in turn.  Forests were clearcut, and the environment – including the very air we breathe – was devastated to produce the world’s current wealth.

Perhaps some of the people in power now do want a warmer planet.  But it is not theirs.  As phrased by Wendell Berry,

the world is not given by [our parents], but borrowed from [our] children.”

We should feel horrifically embarrassed to return this world in worse condition than when we were lent it.

Featured image: Night Landscape with Ruined Monastery by Lluís Rigalt (1814 – 1894).

On ‘The Overstory.’

On ‘The Overstory.’

We delude ourselves into thinking that the pace of life has increased in recent years.  National news is made by the minute as politicians announce their plans via live-televised pronouncement or mass-audience short text message.  Office workers carry powerful computers into their bedrooms, continuing to work until moments before sleep.

But our frenzy doesn’t match the actual pace of the world.  There’s a universe of our own creation zipping by far faster than the reaction time of any organism that relies on voltage waves propagating along its ion channels.  Fortunes are made by shortening the length of fiberoptic cable between supercomputer clusters and the stock exchange, improving response times by fractions of a second.  “Practice makes perfect,” and one reason the new chess and Go algorithms are so much better than human players is that they’ve played lifetimes of games against themselves since their creation.

640px-IFA_2010_Internationale_Funkausstellung_Berlin_18We can frantically press buttons or swipe our fingers across touch screens, but humans will never keep up with the speed of the algorithms that recommend our entertainment, curate our news, eavesdrop on our conversations, guess at our sexual predilections, condemn us to prison

And then there’s the world.  The living things that have been inhabiting our planet for billions of years – the integrated ecosystems they create, the climates they shape.  The natural world continues to march at the same stately pace as ever.  Trees siphon carbon from the air as they grasp for the sun, then fall and rot and cause the Earth itself to grow.  A single tree might live for hundreds or thousands of years.  The forests in which they are enmeshed might develop a personality over millions.

Trees do not have a neural network.  But neither do neurons.  When simple components band together and communicate, the result can be striking.  And, as our own brains clearly show, conscious.  The bees clustering beneath a branch do not seem particularly clever by most of our metrics, but the hive as a whole responds intelligently to external pressures.  Although each individual has no idea what the others are doing, they function as a unit.

Your neurons probably don’t understand what they’re doing.  But they communicate to the others, and that wide network of communication is enough.

Root_of_a_TreeTrees talk.  Their roots intertwine – they send chemical communiques through symbiotic networks of fungal mycelia akin to telephones.

Trees talk slowly, by our standards.  But we’ve already proven to ourselves that intelligence could operate over many orders of temporal magnitude – silicon-based AI is much speedier than the chemical communiques sent from neuron to neuron within our own brains.  If a forest thought on a timescale of days, months, or years, would we humans even notice?  Our concerns were bound up in the minute by minute exigencies of hunting for food, finding mates, and trying not to be mauled by lions.  Now, they’re bound up in the exigencies of making money.  Selecting which TV show to stream.  Scoping the latest developments of a congressional race that will determine whether two more years pass without the slightest attempt made to avoid global famine.

In The Overstory, Richard Powers tries to frame this timescale conflict such that we Homo sapiens might finally understand.  Early on, he presents a summary of his own book; fractal-like, this single paragraph encapsulates the entire 500 pages (or rather, thousands of years) of heartbreak.

image (2)He still binges on old-school reading.  At night, he pores over mind-bending epics that reveal the true scandals of time and matter.  Sweeping tales of generational spaceship arks.  Domed cities like giant terrariums.  Histories that split and bifurcate into countless parallel quantum worlds.  There’s a story he’s waiting for, long before he comes across it.  When he finds it at last, it stays with him forever, although he’ll never be able to find it again, in any database.  Aliens land on Earth.  They’re little runts, as alien races go.  But they metabolize like there’s no tomorrow.  They zip around like swarms of gnats, too fast to see – so fast that Earth seconds seem to them like years.  To them, humans are nothing but sculptures of immobile meat.  The foreigners try to communicate, but there’s no reply.  Finding no signs of intelligent life, they tuck into the frozen statues and start curing them like so much jerky, for the long ride home.

Several times while reading The Overstory, I felt a flush of shame at the thought of how much I personally consume.  Which means, obviously, that Powers was doing his work well – I should feel ashamed.    We are alive, brilliantly beautifully alive, here on a magnificent, temperate planet.  But most of us spend too little time feeling awe and too much feeling want.  “What if there was more?” repeated so often that we’ve approached a clear precipice of forever having less.

In Fruitful Labor, Mike Madison (whose every word – including the rueful realization that young people today can’t reasonably expect to follow in his footsteps – seems to come from a place of earned wisdom and integrity, a distinct contrast from Thoreau’s Walden, in my opinion) asks us to:

image (3)Consider the case of a foolish youth who, at age 21, inherits a fortune that he spends so recklessly that, by the age of 30, the fortune is dissipated and he finds himself destitute.  This is more or less the situation of the human species.  We have inherited great wealth in several forms: historic solar energy, either recent sunlight stored as biomass, or ancient sunlight stored as fossil fuels; the great diversity of plants and animals, organized into robust ecosystems; ancient aquifers; and the earth’s soil, which is the basis for all terrestrial life.  We might mention a fifth form of inherited wealth – antibiotics, that magic against many diseases – which we are rendering ineffective through misuse.  Of these forms of wealth that we are spending so recklessly, fossil fuels are primary, because it is their energy that drives the destruction of the other assets.

What we have purchased with the expenditure of this inheritance is an increase in the human population of the planet far above what the carrying capacity would be without the use of fossil fuels.  This level of population cannot be sustained, and so must decline.  The decline could be gradual and relatively painless, as we see in Japan, where the death rate slightly exceeds the birth rate.  Or the decline could be sudden and catastrophic, with unimaginable grief and misery.

In this context, the value of increased energy efficiency is that it delays the inevitable reckoning; that is, it buys us time.  We could use this time wisely, to decrease our populations in the Japanese style, and to conserve our soil, water, and biological resources.  A slower pace of climate change could allow biological and ecological adaptations.  At the same time we could develop and enhance our uses of geothermal, nuclear, and solar energies, and change our habits to be less materialistic.  A darker option is to use the advantages of increased energy efficiency to increase the human population even further, ensuring increasing planetary poverty and an even more grievous demise.  History does not inspire optimism; nonetheless, the ethical imperative remains to farm as efficiently as one is able.

The tragic side of this situation is not so much the fate of the humans; we are a flawed species unable to make good use of the wisdom available to us, and we have earned our unhappy destiny by our foolishness.  It is the other species on the planet, whose destinies are tied to ours, that suffer a tragic outcome.

Any individual among us could protest that “It’s not my fault!”  The Koch brothers did not invent the internal combustion engine – for all their efforts to confine us to a track toward destitution and demise, they didn’t set us off in that direction.  And it’s not as though contemporary humans are unique in reshaping our environment into an inhospitable place, pushing ourselves toward extinction.

Heck, you could argue that trees brought this upon themselves.  Plants caused climate change long before there was a glimmer of a chance that animals like us might ever exist.  The atmosphere of the Earth was like a gas chamber, stifling hot and full of carbon dioxide.  But then plants grew and filled the air with oxygen.  Animals could evolve … leading one day to our own species, which now kills most types of plants to clear space for a select few monocultures.

As Homo sapiens spread across the globe, we rapidly caused the extinction of nearly all mega-fauna on every continent we reached.  On Easter Island, humans caused their own demise by killing every tree – in Collapse, Jared Diamond writes that our species’ inability to notice long-term, gradual change made the environmental devastation possible (indeed, the same phenomenon explains why people aren’t as upset as they should be about climate change today):

image (4)We unconsciously imagine a sudden change: one year, the island still covered with a forest of tall palm trees being used to produce wine, fruit, and timber to transport and erect statues; the next year, just a single tree left, which an islander proceeds to fell in an act of incredibly self-damaging stupidity. 

Much more likely, though, the changes in forest cover from year to year would have been almost undetectable: yes, this year we cut down a few trees over there, but saplings are starting to grow back again here on this abandoned garden site.  Only the oldest islanders, thinking back to their childhoods decades earlier, could have recognized a difference. 

Their children could no more have comprehended their parents’ tales of a tall forest than my 17-year-old sons today can comprehend my wife’s and my tales of what Los Angeles used to be like 40 years ago.  Gradually, Easter Island’s trees became fewer, smaller, and less important.  At the time that the last fruit-bearing adult palm tree was cut, the species had long ago ceased to be of any economic significance.  That left only smaller and smaller palm saplings to clear each year, along with other bushes and treelets. 

No one would have noticed the falling of the last little palm sapling.

512px-Richard_Powers_(author)Throughout The Overstory, Powers summarizes research demonstrating all the ways that a forest is different from – more than – a collection of trees.  It’s like comparing a functioning brain with neuronal cells grown in a petri dish.  But we have cut down nearly all our world’s forests.  We can console ourselves that we still allow some trees to grow – timber crops to ensure that we’ll still have lumber for all those homes we’re building – but we’re close to losing forests without ever knowing quite what they are.

Powers is furious, and wants for you to change your life.

You’re a psychologist,” Mimi says to the recruit.  “How do we convince people that we’re right?”

The newest Cascadian [a group of environmentalists-cum-ecoterrorists / freedom fighters] takes the bait.  “The best arguments in the world won’t change a person’s mind.  The only thing that can do that is a good story.”