How can we compare climate change and public debt risks?

It seems to me that, over the next 20 years or so, people in Western democracies are likely to suffer to a greater extent from the consequences of an explosion in public debt than from climate change. At the same time, I acknowledge that climate change could possibly pose a serious threat to civilization and perhaps human survival. The chart shown above is my attempt to illustrate how those risks might be compared.

I make no claim to expertise in assessment of climate change risks. My reading on the topic suggests that the theory that increasing concentrations of greenhouse gases in the atmosphere are contributing to climate change is widely accepted by scientists. However, people with relevant expertise obviously have different views about the rate at which climate change is likely to occur, the contribution of human activity, the political feasibility of various forms of remedial action, and the adaptability of humans and other living creatures.

In my view, too little attention has been given to “tail risk” associated with climate change – the low probability that climate change will result in a great deal of human misery, as shown in the chart above. As I have written here previously, if you are concerned about climate change, you (like me) are likely to be more concerned about the remote possibility that your great grandchildren might suffer from having to live with potentially catastrophic climate change outcomes than about the more probable outcome that climate change might cause their incomes to be somewhat lower than economic modelling suggests they would be otherwise. I have also previously expressed agreement with Nassim Taleb that there are some risks we should avoid if possible, even though there is a low probability that they will occur at any point in time. In order to flourish, future generations need to be able to survive.

The reasoning behind the rest of the chart requires more explanation. Why do I think there is a 95% probability that the citizens of western democracies will suffer as much or more over the next 20 years from an explosion in public debt than from climate change? Since I don’t have either the inclination or expertise to weigh up the technical evidence on climate change for myself, I tend to rely on the IPCC’s assessments. I suspect the authors of IPCC reports are still somewhat biased toward attempting to present a view favouring urgent international action to reduce greenhouse gas emissions. Nevertheless, after they have been modified in the light of expert public scrutiny, the IPCC reports are probably the most authoritative source of independent assessments of the relevant evidence.

The IPCC’s assessment of likely climate change outcomes in Chapter 3 of its recent special report, Global Warming of 1.5 ºC, implies that we can expect some fairly serious adverse consequences over the next few decades:

“The impacts of climate change are being felt in every inhabited continent and in the oceans. However, they are not spread uniformly across the globe, and different parts of the world experience impacts differently. An average warming of 1.5°C across the whole globe raises the risk of heatwaves and heavy rainfall events, amongst many other potential impacts. Limiting warming to 1.5°C rather than 2°C can help reduce these risks, but the impacts the world experiences will depend on the specific greenhouse gas emissions ‘pathway’ taken. The consequences of temporarily overshooting 1.5°C of warming and returning to this level later in the century, for example, could be larger than if temperature stabilizes below 1.5°C. The size and duration of an overshoot will also affect future impacts.”

However, a recent OECD report on Greece, which is fairly optimistic about the future of that economy, seems to me to illustrate that public debt crises are likely to result in much more human misery than climate change over the next few decades:

“Despite these positive developments, challenges abound. GDP per capita is still 25% below its pre-crisis level. The public debt is still high and a source of significant vulnerability. Poverty rose sharply during the crisis, especially among the young and families with children. Though poverty has stabilised, it remains near a record high. Skill mismatch is also high and investment remains depressed. This contributes to low productivity – which has fallen further behind other OECD countries – and low wages – resulting in high in-work poverty. Though improving, female labour participation is among the lowest across OECD countries. The recovery in investment is held back by a dearth of finance – due in part to high levels of non-performing loans and to capital controls – high cost of capital relative to wages, cumbersome regulations and low demand. These problems weigh on people’s well-being”. 

As I explained in a recent post, there are strong reasons to expect that the failure of governments in most OECD countries to restrain the growth of government spending is likely to cause debt servicing to become a more widespread problem in the decades ahead.  I think the most likely outcomes in most western democracies will probably be much worse that the outcomes of climate change, although not be as bad as the experience of Greece over the last decade. The chart above is drawn to acknowledge that there is some possibility that democratic governments will lift their performance, or world interest rates will remain low, so debt servicing may not be a problem.

The modest adverse outcomes depicted on the right side of the chart might well be offset by positive factors. There is a good chance that over the longer term the positive impacts of technological advances will be sufficient to offset the negative impacts of both public debt accumulation and climate change, but it would be excessively optimistic to expect rapid technological progress and productivity growth in western democracies over the next 20 years.

Some readers may object to my attempt to compare the risks associated with climate change and public debt explosion on the ground that these are very different risks when viewed at a national public policy perspective. There obviously isn’t much the government of any country can do to reduce climate change risk by acting alone.

However, I have drawn the chart with individual well-being in mind. From an individual’s perspective, the risks surrounding climate change and public debt are quite similar. Nothing that individuals do by themselves will make much difference to national or global outcomes. Voting might appear to provide an avenue for individuals to influence national outcomes but, as others have observed, voting in a national election is like ordering a meal from the menu in a restaurant and being served the same meal irrespective of what you order.  

There are options that individuals can consider to reduce their exposure to both climate change and public debt risks. For example, consideration of climate change risk might influence decisions about housing location and construction, and consideration of public debt risks might cause individuals to reduce the extent that their families rely on government for health services, education and retirement incomes.

It strikes me that climate change and the risks of public debt explosion also pose similar ethical issues for individuals. Does the fact that an individual’s actions, considered in isolation, has a negligible impact on global and national problems absolve him or her of an obligation to moderate his or her contributions to those problems? I think not, but I will leave consideration of the issue for another time.  

Is subjective-predictive morality consistent with the template of individual responsibility?

This question arose while I was reading Josh Bachynski's book The Zombies, subtitled On Morality.

Josh explains subjective-predictive morality as follows:

“You all know and have seen it (and used it too!). It is the simple morality we commonly use when giving a gift, throwing a party, or trying to predict and ensure how well things will end up for others. When we are practically good. When we seek to help and not hurt others, for no other reason than this is good. What we currently call being courteous or nice, for the sake of just being courteous or nice. When we are not trying to do what’s “Right” per se. When we are trying to do what’s right by them”.

Doing right by others is encompassed in the ethics of doing right by yourself. What is good feels good.  Josh explains the process of subjective evaluative judgment as involving (1) pleasant or unpleasant feelings (2) cognitive reactions concerning the value of those feelings (3) predictions as to whether we will have reason to regret the action contemplated. Josh suggests:

“This is the way we naturally insert quality control into our valuations.”

He goes on to observe:

“As it turns out, in searching for the moral, we have actually made a powerful discovery. And this is in what is also rational or prudent”.

I suggest that readers who are interested in learning more about Josh’s philosophy should read Leah Goldrick’s review at Common Sense Ethics, which contains a link to her interview of Josh, and then begin to read the book itself. This is a long book. I found the authors chatty writing style entertaining at first, but tedious after the first few chapters.

Josh Bachynski’s ethics of doing what is right by oneself and others seems quite similar to the template of responsibility, advocated by Douglas Den Uyl and Douglas Rasmussen in The Perfectionist Turn. The ethics of responsibility is based on “the existential fact that we must make something of our lives”. This is explained in a passage I have quoted previously:

“For the template of responsibility, the basis for determining worthiness is human flourishing or wellbeing of some sort. Its ultimate value is integrity. Integrity expresses itself interpersonally in honour but when applied to the agent herself, the term ‘integrity’ signifies a coherent, integral whole of virtues and values, allowing for consistency between word and deed and for reliability in action”.

There are some differences between the two approaches. Pleasant and unpleasant feelings are not given a great deal of prominence in Den Uyl and Rasmussen’s view of human flourishing. They define human flourishing as consisting of “activities that both produce and express in a human being an actualization of potentialities that are specific to the kind of living thing a human being is and that are unique to each human being as an individual”. At one point, Den Uyl and Rasmussen suggest that “an objective account of human flourishing can be characterized as a life of right desire”. They argue that the value of something to a person “is not necessarily a mere matter of “its being desired, wanted, or chosen” because a person “is more than a bundle of passions and desires”. That is still consistent with the view that emotions such as joy and disgust provide important information to help us to decide what we value.

Another possible source of difference is in respect of naturalism. From my reading of The Zombies, it seems likely that Bachynski would be suspicious that Den Uyl and Rasmussen’s teleological naturalism could be seeking to perpetuate ancient errors about human nature that scientific advances have given us reasons to question. I don’t think such suspicions would be well-founded because Den Uyl and Rasmussen present a view of human flourishing that is explicitly individualistic, agent-relative and self-directed.

As I see it, the differences between the philosophical approaches discussed above have parallels in the differences between some psychological therapies. Subjective predictive morality seems to have much in common with rational emotive approaches (REBT) in which people use reasoning to moderate their emotional responses. The template of responsibility seems to a lot in common with an acceptance and commitment approach (ACT) in which people ask themselves how they can actualize their potential in the given situation to act in accordance with their values, whatever their current emotional states might be. Perhaps there may also be parallels in the differences between philosophic approaches of the Stoics and Aristotle.

Subjective predictive morality and the template of responsibility both involve the use of practical reason. The question of which approach is better should probably be viewed as an empirical matter. In your experience, which approach has been of greatest help you in doing the right thing by yourself and others? The correct answer could well be different for different individuals.

In the light of similarities between subjective-predictive morality and the template of individual responsibility, it may come as a surprise to some readers that the authors have vastly different political perspectives. Josh Bachynski describes himself as “a left-leaning liberal democrat” and his book begins with a rant to the effect that he sees “ecological/economic disaster” as “disturbingly likely” because of “wasteful and self-destructive profit structures”. Douglas Den Uyl and Douglas Rasmussen are classical liberals who have proudly given one of the chapters in their book the title: “The entrepreneur as a moral hero”.

I find it impossible to believe that those vast differences in world view stem from differences in their philosophical views about ethics. There may be some differences in the value they place on individual liberty, but they don’t seem to be huge. Their different world views must stem from different perceptions about the way the economic system works and the likelihood of ecological/economic disaster. It is a matter of who is right and who is wrong about relevant aspects of the real world.

For what it is worth, I think there is a very high probability that Josh is wrong, but I acknowledge that we shouldn’t be ignoring low probability outcomes that would be disastrous for humanity. Unfortunately, as I observed in my comments on Nassim Taleb’s book, Skin in the Game, when it comes to consideration of potential Black Swan events that threaten the survival of humanity, the political systems we have inherited do not ensure that political leaders have enough skin in the game for their minds to focus appropriately. Political leaders tend to focus on their survival at the next election rather than on the survival of humanity. It is up to citizens who are concerned about potential Black Swan disasters to initiate appropriate action themselves.