Inheritance and environment's impact on ethics

Once discounted insights are now found important and have ethical consequences. Andrew Davison concludes his series on biology’s current developments.

Andrew Davison

Andrew works at the intersection of theology, science and philosophy. He is Canon and Regius Professor of Divinity at Christ Church, Oxford.

A wall tile shows a 1940s woman tend a stove below a washing line.

A commemorative tile honours Dutch woman who made 'something out of nothing. during the hunger winter.

Peter de Wit (FaceMePLS), CC BY 2.0, via Wikimedia Commons

There’s no more exciting work in biology at the moment than thinking about organisms in terms of their environment. That’s a crucial part of the lively current scene in evolutionary thought (which I described in my previous article), and part of how a new generation of fascinating writers is urging us to throw off the overly narrow perspectives of the twentieth century. It’s not that Darwin’s fundamental insights were wrong, just that some of his followers took them to rule out, or discount, features of biology that turn out to be real and important.

In fact, Darwin was often ahead of the game here. He was more interested in cooperation between species, for instance, than many writers who went on to champion his ideas. He wrote brilliantly about the relationship between moths and orchids, for instance, and between plants and earthworms. Similarly, as Jessica Riskin has recently pointed out, he never dropped the idea that what organisms do during their lifetime affects what they pass on to their offspring (what he called ‘use and disuse’). For much of the twentieth century, that idea, of passing on of acquired characteristics, was biological heresy, but today it’s making a comeback.

The excitement in contemporary evolutionary biology can usefully be gathered under two headings. Alongside ‘organism and environment’, there’s also ‘extended heredity’, although the two are closely related on some points. They’re both important as part of the sort of discussion presented on this site – run in conjunction with the Church of England, of all things – not just because it’s good for religious institutions to demonstrate enthusiasm for science, but also because they’re full of ethical consequences.

Passing on to the progeny

Take ‘extended inheritance’: extended, in the sense that there’s so much more that’s inherited from parent to child than just a DNA sequence. For one thing, every organism bequeaths a world to its progeny, which means a world that’s at least somewhat adapted: at least a little (as with some bacteria, although others are adept at ‘ecosystem engineering’) or massively, as when a beaver completely changes its surroundings by building a dam, or when human beings cover the Earth with marvellous and terrible things. The transformed landscape of the beaver and the human being, even of the bacterium, is part and parcel of what they each pass on to their progeny, and therefore part of biological inheritance. That really puts the environment back at the centre of our thinking about organisms and evolution.

Taking a wider view than genes-are-all-you-pass-on has no lack of consequences. In their accessible and endlessly fascinating 2018 book Extended Heredity, Russell Bonduriansky and Troy Day show that narrow-mindedness on that front has had terrible consequences. They see it behind the Thalidomide birth defect tragedy, for instance, and the strange unwillingness of medics, in the middle of the twentieth century, to take the dangers of foetal alcohol syndrome seriously. If it’s a matter of scientific dogma that all that matters is what genes parents give to their offspring, other factors – like bothering to monitor what effects alcohol have on pregnant women and developing child, or the effects on them of a new medicine – don’t look as important as they should.

Genes aren’t everything, especially in the developmental phase (from conception through childhood and adolescence). Throughout that period, in particular, genes and environment dance an intimate tango, with genes turning on and off in response to its experience of its environment, before and after birth. Moreover, recent science shows that what happens to you during your lifetime can even be passed onto your offspring, and even to their children after them.

That flies in the face of the idea that all you have to pass on is the genetic hand of cards you were delt at conception (or its equivalent, for instance for a plant). On that hallowed view, the most that life has to offer from that moment on is testing your ‘fitness’, to see whether you manage to pass those genes on, or not, or how abundantly. But that’s far too limited a picture. We don’t just pass on genes; we also pass on the pattern of how genes are tagged to be turned on or off, and that is changed by the conditions the organism has experienced.

Hunger lessons

The most striking, but gruesome, example involving human beings is the ‘Dutch Hunger Winter’ of 1944–45, when occupying German forces starved the Dutch population in retaliation for resistance victories. Children conceived during that period grew up with poor metabolism (or, to be more accurate, metabolism that would be good at surviving starvation, but was not well-adapted to healthier post-war life nutrition, which is fascinating in itself). So much for genes being everything. More startling still was the observation that their children also had poor metabolism: the grandchildren of the starved pregnant women. We can pass on acquired characteristics, which really puts the cat among the twentieth century Darwinian pigeons. As the prophet Ezekiel put it, ‘The parents have eaten sour grapes, and the children’s teeth are set on edge’. This is full of ethical freight. The way we treat other people, and ourselves, affects those who come after us: yes, socially and culturally, which is significant enough, but even in how their bodies are programmed to develop.

A stimulating environment

There’s a similar ethical charge to what is perhaps my favourite part of the newly boisterous world of biology: phenotypic plasticity. That’s the simple idea that the same genes (the ‘genotype’) will produce a differently structured organism (the ‘phenotype’) in response to different environments. In one sense, it’s obvious enough. If I go to the gym for a year – a particular kind of environment – I’ll look different afterwards than if I’d spend an equivalent length of time on the sofa.

But it goes much further than that. Various plants will produce different sorts of leaves, for instance, depending on whether they grow in more or less shady situations. Sometimes, one species can be mistaken for two, as happened with fish, called cichlids, in Lake Tanganyika (between Tanzania and the Democratic Republic of Congo). What scientists had thought to be separate species, because their jaws are so different, turned out to be the same species. If a fish grows up at the bottom of the lake, it develops one mouth shape, with large, strong jaws, for munching shellfish; if a it with the same genes grows up at the top of the lake, it develops delicate jaws, useful for eating other kinds of food.

Again, the repercussions of ethics are enormous, and that brings us back to the ugly subject of eugenics, mentioned in the first of these articles. At root, eugenics is based on the assumption that some people just are healthy, and others just are sick, because some have ‘good genes’, while others have ‘bad genes’. You are either blessed with the former, or doomed with the later, and that’s set in stone, from conception. It’s then (supposedly) the ‘right thing’ to promote the former when it comes to reproduction and, at its most horrific, to restrain, sterilise, or even slaughter the latter. Eugenics cast its shadow over more of the twentieth century than we might like to admit. At one time or another, it was the darling of both the political right and the political left. It hasn’t gone away.

Before we say anything else, there’s a moral flaw in thinking that concern for the gene pool trumps concern for suffering individuals. More than that, though, the biology shows eugenics to be flawed even on its own, supposedly scientific, terms. We aren’t just blessed or doomed by the genetic hand of cards we’re delt at conception. Like those plants, growing in sunlight or shade, what our genes will mean is also determined by our setting. Like those African fish, our genes can run more than one programme, so the environment matters.

Eugenics presents the all-to-convenient picture that the sick will be sick, the weak will be weak, and that’s that. But we’re not just doomed or blessed by genes. It matters, for instance, what sort of housing we have, how we’re fed, and whether we have access to fresh air and places for exercise, and to stimulus for the mind, and companionship. Putting people into groups (healthy and sick, or worthy and unworthy), then writing off one of those groups might be politically and economically convenient, but it’s bad science, as well as bad morals.

Reason to be curious

I started this series by mentioning how important the theology and philosophy of the Middle Ages has been for me, in working between theology and science. In one of his little read works, Thomas Aquinas (1224–1274) defended having the expansive curriculum used in training Dominican friars like himself. (It helped that this curriculum was being drawn up, in part, by Albert the Great – perhaps the greatest polymath of his century, and later patron saint of scientists.) One should be open to knowing about everything, Aquinas argued, because you never know what will come in useful later on. We have an excellent, and timely example of that, in how something as obscure as phenotypic plasticity bears on eugenics, and the eminently practical question of proper housing.

Recently, in fact, the Church of England has been working hard on housing. The Bishop of Chelmsford, Guli Francis-Dehqani, has the new housing brief among the bishops. The church’s council for Mission and Public Affairs has also been busy, not least with the publication of Coming Home: Christian Perspectives on Housing in 2020. What might have seemed like rather abstract wranglings among biologists, over where to put the emphasis in their theories about nature, turns out to show how right it is to be passionate about good housing (and, it turns out, about keeping abreast of biology).

As the congregation gathers Bruce Springsteen leans hard into hope

Chords of confrontation and communion

Elizabeth Wainwright

Elizabeth Wainwright is a writer, coach and walking guide. She's a former district councillor and has a background in international development.

Bruce Springsteen crouches down and holds a hand out to a sea of outstretched hands

Springsteen plays Manchester.

Brucespringsteen.net.

I finally got to experience a Bruce Springsteen concert recently. Which is to say, for three hours, I touched a land of hope and dreams.

We walked along a canal to get to the arena – my husband, my father-in-law, and me –Manchester shimmered with the arrival of summer, and light bounced off red brick and still water. We neared the arena and the air felt dense with anticipation. T Between us we carried heartbreaks, elections, hopes, failures, and a collective return to music that had accompanied and clarified it all. We were drawn by loyalty and nostalgia and joy, but also I sensed by a hope that Bruce would meet the moment — the frayed, furious, anxious now — with something that mattered.

We found our seats and gripped our drinks as the lights dimmed. Thousands of people stopped individual conversations, and hushed, and then joined voices into a deep and reverent chant. “Bruuuuuuuce”. To my right, the glow of a screen, the woman holding it sending a text – “yes babe, 1pm, lovely” – and it seemed incongruent and true. In the tension before the release, in the dark before the light, we hold our breath even as the ordinary carries on. The ordinary carries on even as the world fractures and glows. The ordinary is what Bruce often sings of, it is one reason why fans feel heard and seen by him. That night though, all the ordinaries he sang of formed something extraordinary.

Then there was light, and Bruce walked slowly from the side to the front of the stage, his guitar suspended across his body, his face a relaxed, broad smile, his bandmates and companions beside and behind him. Then there was music. No videos, no pyrotechnics; just old songs that felt as if they existed for the now. My City of Ruins, Death to My Hometown, Land of Hope and Dreams, The Promised Land. The song Long Walk Home was introduced as a “prayer to my country”. It is a country that he embodies, despairs of, and loves. He sings of his home with fury, sorrow, tenderness, and love.

Riffs and rhythms that were decades old were being made urgent again. Springsteen’s music holds both grit and glory, and hard-won joys leave space for sorrow. I write this and lines by Mary Oliver come to mind: “We shake with joy, we shake with grief / what a time they have these two / housed as they are in the same body.” What a time they had, joy and grief, that night with Bruce.

The evening unfolded not as spectacle but as liturgy; all of us involved in something like devotion – in part to Bruce, but also to moral clarity, to the power of poetry, to the promise of who we could be. At times the crowd seemed silent, ushered into something deeper – not entertainment or escapism, but something like confrontation and communion. We were being offered the joy of music and memory, but also an opportunity to reckon with who we are.

Between songs, Bruce spoke. He apparently rarely does so in his gigs. His voice slowed and deepened – not chit chat, not to entertain, but to bear witness and stand defiant and call us to the best versions of ourselves. “I’ve spent my life singing about where we’ve succeeded and come up short in pursuit of our civic values,” he said. “I just felt that was my job.” He proceeded to describe how those values are being torn apart, and why they matter. The crowd roared. He was making civic values shine, speaking about them with urgency. He acknowledged both the dream and the failure, but still he believes in the promised land and he asks us to as well. Before he belted out Rainmaker, he said, “when conditions in a country are right for a demagogue, you can bet one will show up.” He spoke of America, and really of the world – what it is, what it is becoming. His honesty and poetic rage situated us, then became a map for how to keep going.

We can be glad to be alive even while we are honest about sorrow, injustice, broken politics, fractured families, and tired hearts.

I found myself wondering: why is it that Bruce can sing and speak about justice, warped politics, and who we are becoming, and be met with cheers, while so many churches avoid doing so, preferring instead to whisper in neutral tones while the world burns? That night, I stood in a crowd of thousands and I heard a kind of moral clarity that orientates the soul and made me cry. It wasn’t partisan, it was human. Why can it feel riskier to speak specifically and prophetically in a sermon than in a stadium? I wonder if it’s because Springsteen has always rooted his politics in people’s real lives – in work, family, grief, memory. He doesn’t gesture toward abstract ideologies for fear of alienating people, or in the hope of retaining fans: he tells stories and gives names to problems and injustices, singing about crooked institutions, boarded-up factories, buses that never come, lovers who don’t come back.

The evening felt, for me, like the kind of church I long for and sometimes touch: no tidy answers, no insincere lyrics, no vague calls for justice, but rather honesty and specificity and the chance to stand alongside strangers and feel something challenging, beautiful, true.

I scribbled a question as the music soared: can a chord be mystical? Because that’s how it felt. As if there are progressions – minor then major, dissonance into harmony – that can reach past language and speak directly to the part of us that longs for love more than cynicism, to the part of us that still dares to hope even when there is very little obvious reason to do so, to the part of us wondering how to be truly alive.

Near the end, Bruce quoted the American writer James Baldwin:

“In this world, there isn’t enough humanity as one would hope. But there’s enough.”

There’s enough. It was a small phrase but it hung in the air like incense. For Bruce, there is enough humanity to keep singing for, and about. Now, he seemed to ask the crowd, what will you do with that enoughness, with that humanity?

In the final stretch, Bruce leaned hard into hope with songs like The Rising and Born to Run. The energy in the room felt like resistance – not against something, but for something. He didn’t pretend everything’s fine, but he sang anyway. “It ain’t no sin to be glad you’re alive.”

We can be glad to be alive even while we are honest about sorrow, injustice, broken politics, fractured families, and tired hearts. Gladness is being asked to stand its ground now, and to do something with our improbable aliveness. For the final song, Bruce played Bob Dylan’s Chimes of Freedom. It is a song about lightning and exiles and freedom, about the trembling of the soul and about a sky that “cracked its poems in naked wonder.” He sang it slowly, tenderly, like a prayer – which can also be a trembling of the soul, a song of naked wonder. Perhaps he prayed to God, perhaps to some other sacred thing: our better angels, or the fragile hope of who we might yet become.

In a BBC documentary about Bruce Springsteen’s history with the UK, someone says “there’s something in Bruce fans, you know you can implicitly trust them.” As we filed out of the arena, it felt like 25,000 of us briefly knew each other, trusted each other, could take on the world together. Perhaps we just had.

Soon it was just me, my husband, my father-in-law, and the silent dark canal as we walked back into the night. We were tired, we were awake. I thought of Bruce’s belief in the promised land, and of Baldwin’s line: there’s not enough humanity, but there’s enough. These are beliefs that can feel risky. So can belief in God. But enough is plenty. Enough can turn up the volume and let the spirit be our guide. With 25,000 other people, I’d turned that volume up and I could hear the spirit defiant, unifying, guiding. It is – has always been – time to go and sing of it, despite everything.