Not just red in tooth and claw: biology's big debates

In the second of a series, biologist and priest, Andrew Davison, examines why it’s important to keep up with biology’s big debates.

Andrew Davison

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

An osprey, in flight, holds a fish in its claws.

‘Wherever there’s water or air to navigate, the laws of fluid dynamics are bound to throw up wings, and bodies shaped like fish.’

Photo by Mathew Schwartz on Unsplash.

There’s hardly been a livelier time for evolutionary science than today; indeed, passions can run high. It’s not that Darwin’s vision of evolution is fundamentally in doubt: species adapt by natural selection, there’s variation between individuals, and those better adapted for their environment survive more often, passing on their genes to their children. In that, the theory of evolution stands, but many other parts of the evolutionary picture from the second half of the twentieth century are coming under criticism. That includes the following maxims:

‘the only significant form of inheritance involves genetic code’,

‘nothing that happens to an organism during its lifetime is passed on to its progeny’,

‘we agree what we mean by “species”’,

‘genes pass down the branches of the tree of life, not between them’,

and ‘evolution is fundamentally all about competition, not cooperation’.

Among the excellent crop of writers on these themes, Eva Jablonka and Marion Lamb stand out for their elegant prose, and a gift for communicating complex ideas clearly. As they recognise, the standard mid-twentieth century model of evolution might be worth criticising, but it’s also landed all sorts of important basic points. (They list ten.) The shortfall of the earlier, dominant theory was in being too narrow, with each insight too quickly eclipsing others.

Here are two examples. First, the classic twentieth century picture saw inheritance in terms of DNA and genes, passed on by ‘germline’ cells, such sperm and pollen. That’s all true, but it shouldn’t restrict our wider view of inheritance to that. Today, writers such as Jablonka and Lamb stress that organisms inherit from their parents (or parent) in all sorts of ways.

A second plank of the twentieth century picture is that evolution involves descent from a common ancestor. Again, that says something vital, even central, accepted by evolutionist old and new. The twentieth century position, however, added a restriction: that’s all that’s important on this score. The newer perspective recognises that while genes are – of course – central, and passed on from parent to child, organisms also swap genes between themselves (between branches of the tree of life, not just along those branches), even between very different species.

If we’re not careful, what’s written and taught (not least by theologians), even with the best will in the world, will be thirty or even fifty years out of date.

There’s a lot of excitement around these sorts of claims (and, remember, Jablonka and Lamb make eight more), and that can get quite noisy. Defenders of the older, narrower picture typically say that the newer themes are simply fuss over minor points. Advocates of the newer perspective disagree, saying that the twentieth century picture risks missing some important features of biology, which are now coming into better focus.

Why such debates matters

Why might this ferment among biologists matter for a site like this one, and for theologians, and discussions of religious matters? Well, for one thing, as I pointed out in my previous article, nothing quite dissolves the supposed animosity between science and religion (which is, after all, a relatively recent invention) like theologians and religious people getting excited about biology. It’s also important that any humanities scholar, the theologian among them, who’s engaging with science should keep up to date. If we’re not careful, what’s written and taught (not least by theologians), even with the best will in the world, will be thirty or even fifty years out of date.

But there’s more at stake. As we have seen, the twentieth century picture, for all it brought an admirable clarity to evolutionary thought, was reductionistic. We see that in Jablonka and Lamb’s exhortation to scientists: ‘yes, stress x, but don’t think that means you have to deny y.’ A religious vision tends to be an expansive one. It wants to recognise the reality and value of all sorts of things. Yes, there’s matter, atoms, molecules, and genes, but there’s also organisms, agents, cultures, groups, economies, hopes, loves. They’re all real. We can’t reduce one to the other: not organisms to genes, or agents to economies. A turn from reduction is welcome.

More than that, almost everything in the emerging twenty-first century view of evolution is fascinating from a theological perspective.

Take convergence, for instance. It turns out that evolution isn’t just driven by randomness, or by the demands of the surroundings. Also important are various features of physics, or mathematics – the contours of reality – that throw up elegant solutions to evolutionary problems, which are adopted by evolution time and again. Wherever you need to sturdy and space-efficient packing of cells (as in a honey comb, or a a wasp’s nest), the hexagon is ready and waiting. Wherever there’s water or air to navigate, the laws of fluid dynamics are bound to throw up wings, and bodies shaped like fish, dolphins, and penguins (which are all quite similar in shape).

How do we know this? Because evolution has converged on wings and that body shape independently, many times, as also on eyes, and everything else that Simon Conway Morris lists in the nine closely printed columns of convergences in the index to his book Life’s Solution. Evolution certainly involves randomness and need, but alongside them is something more like Plato’s forms: timeless realities, there to be discovered and put to work. Among the more theological of these eternal verities, covered in Conway Morris’s book, are perception, intelligence, community, communication, cooperation, altruism, farming, or construction

Exceeding a zero-sum game

Then there’s cooperation. Ever since Darwin’s Origin was published, and, even more, ever since Tennyson wrote about nature ‘red in tooth and claw’, theologians have been embarrassed about the place of cooperation in their vision of the world. Now, however, it turns out, competition isn’t the only force at work in biology or evolution after all. One of the features of reality that evolution discovers and puts to work again and again is cooperation, and ways to exceed a ‘zero-sum’ game. We see that in cooperation within a species, but also in cooperation between species, which is ubiquitous in nature: called mutualism, it’s found everywhere. As a rule, once two species stick around in proximity for the long run, down many generations, their relationship will turn to mutual benefit.

Ethicists are often wary of the suggestion that we can look at the way things are, and read a moral code there (getting an ‘ought’ from an ‘is’), but it’s an unusual person whose vision of right and wrong isn’t shaped, to some degree, by a sense of what the world is like. Well, it turns out that nature bears witness to the enduring worth of cooperation, and not only to competition.

In the first of these articles on biology, I pointed out the significance of ethics in thinking about biology, and about evolution in particular. For better or worse, and often for worse, thinking about evolution has been an ethical, social, political story. The evolutionary has been put to work for immoral, ends. It turns out to be wrong twice over to suppose evolution commends only competition. It’s wrong, first of all, because we are rational creatures, who can aspire to an understanding of good and evil that transcends the realm of nature. But also, as we now see, it’s wrong even to suppose the nature is only red in tooth and claw. There’s competition, but there’s also a lot of cooperation.

Suggested further reading

Archibald, John. 2014. One Plus One Equals One: Symbiosis and the Evolution of Complex Life. Oxford: Oxford University Press. An accessible introduction to biological mutualism, with an emphasis on the role of hybrid organisms (one living inside another) in major evolutionary transitions.

Bronstein, Judith L., ed. 2015. Mutualism. Oxford: Oxford University Press. The new standard treatment of biological mutualism.

Morris, Simon Conway. 2008. Life’s Solution: Inevitable Humans in a Lonely Universe. Cambridge: Cambridge University Press. A comprehensive discussion of convergence in evolution.

Day, Troy, and Russell Bonduriansky. 2018. Extended Heredity: A New Understanding of Inheritance and Evolution. Princeton, NJ: Princeton University Press. An engaging introduction to a broadened picture of inheritance.

Davison, Andrew. 2020a. Biological Mutualism: A Scientific Survey. Theology and Science 18 (2): 190–210. An accessible survey of some of the science of biological mutualism.

———. 2020b. Christian Doctrine and Biological Mutualism: Some Explorations in Systematic and Philosophical Theology. Theology and Science 18 (2): 258–78. A foray into some of the significance of mutualism for Christian theology.

Jablonka, Eva, and Marion Lamb. 2020. Inheritance Systems and the Extended Synthesis. Cambridge University Press. A short discussion of many of the more expansive aspects proposed for contemporary evolutionary thought.

Jablonka, Eva, Marion J. Lamb, and Anna Zeligowski. 2014. Evolution in Four Dimensions: Genetic, Epigenetic, Behavioral, and Symbolic Variation in the History of Life. Revised edition. Cambridge, MA: MIT Press. One of the most substantial discussions of the new perspective.

Laland, Kevin, Tobias Uller, arc Feldman, Kim Sterelny, Gerd B. Müller, Armin Moczek, Eva Jablonka, et al. 2014. Does Evolutionary Theory Need a Rethink? Nature 514 (7521): 161–64. MA short two-sided piece, asking whether a transformation in evolutionary thinking is under way.

Voting is much more than a token gesture

The political practice can capture something heavenly.

Joel Pierce

Joel Pierce is the administrator of Christ's College, University of Aberdeen. He has recently published his first book.

A sign reading 'polling station' stands by the entrance to a church.

What makes an act sacred? Who it excludes, or who it welcomes? I found myself pondering this looking at the thin metal discs in the box I’d pulled off the shelf. I’d seen their tagged under glass at Scotland’s National Museum. Now, in an archive housed in the old kitchen of our rural community’s school, I had my first chance to touch what was once called “the open sesame to the bliss of so great a mercy”, a Church of Scotland communion token. Now items for collectors, filling drawers in local history museums, they once were the necessary payment for participation in one of the rites at the heart of Christian worship. They were the coin that verified that its holder’s faith and morals had been examined by an elder of the kirk and been found satisfactory.

Holy Communion, or the Eucharist as it is called in other churches, has its origins in the Last Supper, a meal of bread and wine Jesus shared with his disciples on the night before his crucifixion. Christians may disagree on the exact meaning of the meal, but all hold that it is, in some way, sacred and central to the Christian life and the recognition and celebration of Christian community. Communion tokens were but one example of a strategy that Christians have employed time and again to ensure that the mystery and sacrality of the meal is properly recognised: stopping the wrong sorts of people from participating in it. Ironically, in this we have often been much more discerning, or perhaps discriminating, than Jesus himself. The companions he chose to initiate the practice were a quarrelsome lot. They were mostly provincial fishermen more concerned with establishing their place in the new kingdom they imagined Jesus would establish after overthrowing the Romans than in participating in the meal with due reverence and seriousness.

All who came were for that day, in that room, in that act, equal. All who came were welcome. No one was turned away.

A year later, I found myself sitting behind a table in the rear of our community’s nursery. It was election day for the Scottish Parliament, and I had added polling clerk to the miscellany of part-time jobs I had taken after finishing my studies. We had all arrived early to ensure that we had time to wrestle enough string and cable ties together to secure the polling station sign around the ancient tree that marked the entrance of the nursery’s car park before polls opened at 7am. It was the first, and only time I have worked a sixteen-hour day, and my exhaustion at the end of it probably contributes to much of it being a bit of blur. What I do remember is the flow of people: mums in smart blouse and skirt combinations with kids in tow, fitting us in first thing before a stop by the childminder’s on the way to the office; tradespeople and farmers catching us between jobs, their trousers still spattered with paint or mud; scions of the local aristocracy; proud parents bringing teenagers to vote for the first time once the school day ended; a couple with a young baby, asleep for now, arriving just before closing, “We’re not too late are we?”.

My fellow poll workers, two old hands, knew most of our customers by sight. I knew a few, mainly other parents I had met during school and nursery drop-offs, but it didn’t matter as the rite was the same for all. They would approach the table, give us their name and address, and once a line was drawn through them on our roll, they were given the elements, two ballots, one to vote for their constituency Member of the Scottish Parliament, and another to vote for their preferred party. All who came were for that day, in that room, in that act, equal. All who came were welcome. No one was turned away. All that was needed was their word that they were who they said they were. Once the ballots were completed, we made sure they put each in the correct ballot and then they were out the door, on to the rest of their day.

Perhaps it is also true that sometimes, as much by accident as intention, we happen upon a form or practice in our shared political life which captures something of heaven.

As someone who did my first voting in the United States, I was a little stunned the first time I cast a ballot in the UK. Instead of having to use a black ink pen to assiduously fill in ovals on a ballot that felt like an extended multiple-choice test, all I needed to do was make a single penciled ‘X’ on a half sheet of coloured paper and make sure it wound up in the secure box. Was that it?

As I’ve reflected on that experience and had a few more goes of voting here, I have come to appreciate the elegance of the British approach. Instead of making the voter feel like an overwhelmed bureaucrat having to make a couple dozen underinformed choices on matters as diverse as national representatives, state laws, school boards, and local ordinances, the simplicity of the UK ballot means that what is centred is the social meaning of the act itself. We may be differentiated on all other days by class, culture, income, region, or football club allegiance, but in this act we come as close in our political practices as we ever do to touching something which Christians know, something which Christians sometimes see as they share Communion, that all these distinctions are ultimately passing, that beyond them each one of us is imbued with a dignity which the greatest worldly failure cannot take away from us and to which the greatest worldly success cannot add.

There is a school of thought in political theory which says that all our most important political concepts are actually secularised theological ones. They say, for example, that our exalted ideas of state sovereignty find their origins in our forebears’ understanding of God’s. Theologians draw various lessons from this approach, some worrying that what it really reveals is that we have made an idol of the state. They may be right, but perhaps it is also true that sometimes, as much by accident as intention, we happen upon a form or practice in our shared political life which captures something of heaven. It is not wrong, I think, to accord such secular practices a certain level of sanctity. It is not wrong to call the principle of ‘one person, one vote’ in some sense sacred.

No longer are we allowed to trust that people are who they say they are. They are assumed to be imposters until they produce a piece of paper which says otherwise.

But once that sacredness has been granted, we face a very similar problem to the one faced by those early Scottish reformers regarding Communion. How do we ensure this sacredness is protected, that it does not become debased? A traditional answer has mirrored the reformers’ approach to communion: erecting hurdles to ensure that only the truly worthy are allowed to participate. The unmaking of this approach has been the slow work of centuries as the franchise was eventually extended down the social and property ladder to all male citizens and, then, belatedly, to all women as well. What I experienced at the polling station that day was a miracle secured by many years’ of struggle, reform, compromise, and collective recognition that what has made this act sacred is not its exclusion, but its welcome. In this it has mirrored the welcome of most contemporary Communion services in the Church of Scotland where participants are, to be sure, asked to approach the act soberly, having examined themselves and made confession to God, but where the default is to trust that people have done so. No longer are people considered unworthy until proven otherwise by their possession by a metal disc.

When I first heard of the possibility of the introduction of Voter IDs at polling places, my mind immediately flew to how such laws were aimed in the United States. Like here, there is little to no actual evidence of voter fraud there, but in a country where the archaic system of the Electoral College means a few thousands votes in the right state can decide a presidential election, there is a real threat that such laws will sway election results. Here the influence of such laws is less clear. While they do seem to have a small effect of driving down participation, at last year’s local elections four pre cent of eligible non-voters cited the ID requirement as the reason they did not vote, recent election results have not been dramatically out of step with opinion polling.

What I do worry about losing with these laws is a little bit of the elegance and dignity which has previously imbued the UK system. No longer are we allowed to trust that people are who they say they are. They are assumed to be imposters until they produce a piece of paper which says otherwise. It is a small change, but one which nudges the rite closer to being just one more bureaucratic transaction, a bit more like picking up a package or going to the bank, than one of our most important public rites. It is a precaution that seeks to preserve the sacredness of the act, but is chipping away at what it is that makes it sacred.
If I wind up working in a polling station on July 4th, I will dutifully check every voters’ ID prior to handing them a ballot. I will send friends and neighbours home to get theirs if they’ve forgotten it. I will be careful to bring my own. I am sure if I had lived in former times in Scotland, I also would have been careful to remember to take my communion token to church. Those are the rules of admittance and the rite is too important to skip. However, I will mourn a little for what has been lost and hope for more places where we recognize the possibility of the sacred dwelling in our practices of welcome, recognition, and trust rather than exclusion.