Column

Biology

Creed

17 May 2023

7 min read

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.

Explainer

Creed

Virtues

15 March 2024

6 min read

Temperance: neurotic vice or self-control for future benefit?

We’re better at bravery than temperance, just when we need that self-control more than ever.

Barnabas Aspray

Barnabas Aspray is Assistant Professor of Systematic Theology at St Mary’s Seminary and University.

A casually dressed man perches on railing balancing, clasping his hands and looking around.

Jed Villejo on Unsplash.

The 21st century is witnessing a crisis of temperance, self-discipline, and self-control. Lent is one way to combat this.

According to the international Leader Character framework, there are eleven “character strengths” important for human wellbeing and good leadership. These include virtues like justice, accountability, courage, and good judgment. Researchers have used this framework to perform thousands of studies on teams and groups of people around the world. These studies show that, almost without exception, temperance is the weakest virtue in every team everywhere. (Not quite every person – each team has one or two members with strong temperance, but temperance is still weakest on average for a group).

The modern world is not only intemperate: it actively encourages the opposite: immediate gratification of desires. Every day we are bombarded with online ads, posters, and TV commercials that tell us to ‘Indulge yourself’; ‘treat yourself’, ‘look after yourself’, along with images of sensually pleasing people and objects. It is a rare advert that appeals to your calm rationality and long-term thinking. The advertising industry knows that it can make much more money from people who lack self-control. If it targets your basic animal impulses, then you are more likely to buy things you don’t need and wouldn’t have thought of without ad’s enticing promise.

Temperance is the power to choose what you won’t regret choosing later on.

Worse still, there are elements of Western thought that praise intemperance as a virtue and pathologize restraint as a psychological disorder. Elements of Freudian psychoanalysis, popularised in the media, suggest that you do damage to your mental health if you suppress your desires or try to hide them. It is far healthier to give free rein – to sexual desire first of all, but to all desires in the end. Temperance is no longer a virtue to be admired, but a neurotic vice that fills your subconscious with envy, bitterness, and psychological problems.

What is temperance anyway and why is it a problem if we lack it?

Temperance is self-control. It is acquired by self-discipline. Its purpose is to organise and order your many desires, giving priority to the ones that matter most to you. Let’s say you want to lose weight, and you also want to eat that doughnut you can see in the shop window. Or you want to save money to buy a house, but you also want that new and larger TV screen. Those are competing desires. Temperance is the power to choose what you won’t regret choosing later on. It doesn’t tell you what you ought to choose: it simply gives you control over your desires so you rule over them instead of them ruling you.

What does lack of temperance look like? Whenever you keep doing something you wish you didn’t keep doing, you are being intemperate. I don’t mean one-time actions that you later regret. I mean things you know you’ll regret even before you do them, yet you still do them. Things like: smoking (for most people), eating too much, browsing Instagram or TikTok instead of working, failing to show up for gym class. It can also mean any kind of procrastination: avoiding doing a task you know you have to do but don’t want to do ‘now’. In sum, it reveals a disorganisation in your priorities and goals, so a lesser priority subverts a higher priority because it’s more immediately available and enjoyable.

We need temperance if we’re going to be happy with where our lives are going

The problem with lacking temperance is that it undermines your own goals for your life and makes your future self a helpless victim of your present self. It leads to a downward spiral of the heart of intemperance is that some desire, some pleasure, some indulgence, has gained so much power over our life that we no longer have control over it. It is in the driving seat, not us. Intemperance is also a cause of self-hatred and low self-esteem. One of the best ways to feel better about yourself is to set long term goals and stick to them. It makes you feel like you’re heading somewhere good.

By contrast, the heart of temperance is to subordinate everything we think, feel, and enjoy to our will, our clear-headed decisions about the kind of person we want to be in the long-term. We need temperance if we’re going to be happy with where our lives are going. Temperance is even needed for worldly success. Warren Buffett once said, “Investing is not a game where the guy with the 160 IQ beats the guy with the 130 IQ. Once you have ordinary intelligence, what you need is the temperament to control the urges that get other people into trouble.”

Why is temperance so lacking in our own time? I can think of at least two reasons.

First, we are one of the wealthiest societies ever to exist. Wealth may have benefits, but it also enables us to get what we want, when we want it. Wealthy people are less used to having their desires unsatisfied than poor people. Unfulfilled longing is a less common occurrence for the rich, so there is little natural opportunity to exercise the muscle of self-denial.

Secondly, we are one of the least religious societies ever to have existed. In contrast to secularism, religion has always had practical tools to cultivate temperance. All major world religions have ritual practices of fasting and feasting designed to exercise and strengthen self-discipline. Every year Muslims endure the gruelling discipline of Ramadan. Orthodox Christians restrict themselves to a vegan diet during the forty days of lent, and many other Christians give up some indulgence. Both rich and poor share alike in this voluntary self-denial. Now that these practices are eroding away, they are being replaced not by other self-discipline practices, but by the worship of I-want-it-here-and-now. This is shown most poignantly in the 2000 movie Chocolat, which explicitly puts up sensual indulgence in competition to traditional religion and abstinence – and indulgence wins.

But the decline of religion has done more than this: it has also undermined the sense of transcendent purpose in many people’s lives – which was what motivated them to look beyond their physical desires. Without hope and without a larger sense of meaning to life, people have less reason to sacrifice short-term pleasures for the sake of longer-term goals.

Nor are sensual desires the only way we can be intemperate. An outburst of rage on social media is a sign of intemperance.

I don’t mean that short-term pleasures are always bad, or that sensual desire is evil in itself. The whole point of temperance is that it involves the right amount, and not too much, of something good. That is what makes it so tricky. If eating a doughnut was like stealing or violence, we would have a stronger voice telling us not to do it. But because it’s not bad in itself, we find it harder to resist. We need temperance to say no to something good when we’ve already taken enough of it, so we don’t take too much.

Nor are sensual desires the only way we can be intemperate. An outburst of rage on social media is a sign of intemperance. A father who spends too long in the office and not enough time with his children is being intemperate. He is sacrificing the long-term goal of healthy family relationships for the short-term goal of career success. We lack the self-control to express our anger in the right place at the right time.

Temperance is needed for so many of the other virtues to function. If you’re not temperate, then you will be late for meetings, fail to deliver work on time, or makes too many commitments that you can’t keep. You’ll be a liability to your friends and colleagues.

Temperance doesn’t tell you what you should aim for in life. But no matter what you aim for, you won’t get it without temperance. So, what are you giving up for lent?