Tuesday, September 9, 2014

Teaching Documents Online

My teaching idol...

Since I have started a new job, I decided to put some of my old teaching documents online. It's just a small sample, but some people might be interested. They are handouts from classes I taught over the past three years, while employed at Keele University. I've just put up the ones dealing with ethics and the philosophy of law for the time being. I may add more in the future.

Bear in mind that these are intended for teaching purposes. I don't defend any particular views in them. I just try to explain key concepts and arguments, and give students some suggestions for how to evaluate and analyse those concepts and ideas.

Here's what I have up so far:

  • Rationality and Efficiency - An introduction to rational choice theory for law students. Also looks at the concept of economic efficiency.
  • Scientific Evidence and Torture - Uses economic concepts to evaluate the worth of scientific evidence and information gained from interrogational torture.

Sunday, September 7, 2014

Next Journal Club: Finitism and the Beginning of the Universe

via the excellent http://www.phdcomics.com 


The next journal club will be dealing with the following paper:



The paper is an interesting contribution to the debate about the Kalam Cosmological Argument. As many of you will know, William Lane Craig (and others) use this argument to support the existence of God. The basic thrust of it is that the universe must have had a cause of its existence. Central to this is the claim that the universe must have begun to exist. This claim is defended on the grounds that an infinite past is an impossibility. One of the main arguments in defence of this impossibility is one that focuses on the impossibility of traversing an actually infinite sequence of past events.

Puryear's paper casts doubt on the plausibility of this argument. Although he accepts that it may be impossible to traverse an actually infinite sequence of events, he argues that the past may not consist of an actually infinite sequence of events, even if the universe had no beginning. (The argument is more nuanced than this, but that's the basic gist of it).

Anyway, we'll be discussing this paper at the end of September/start of October. (The paper is available via the link above).

Friday, September 5, 2014

Do Cognitive Enhancing Drugs Actually Work?




I’ve been writing about the ethics of human enhancement for some time. In the process, I’ve looked at many of the fascinating ethical and philosophical issues that are raised by the use of enhancing drugs. But throughout all this writing, there is one topic that I have studiously avoided. This is surprising given that, in many ways, it is the most fundamental topic of all: do the alleged cognitive enhancing drugs actually work?

One reason for avoiding this topic is that philosophers like to pursue hypotheticals: to imagine possible worlds and trace out their logical implications. And this can be all well and good, but as I have written elsewhere, there is a danger that it leads one to commit the “vice of in-principlism”. That is: the vice of talking about enhancement purely in terms of “well if, in principle, cognitive enhancing drugs worked, then the following would be true…”. This is a vice because there are many real-world substances that are alleged to have an enhancing effect. And it’s important that in all our philosophising we don’t ignore the real-world.

So, anyway, to make up for my historical failure, I am going to try to answer the question now. I do so by summarising three studies on the effects of cognitive enhancing drugs. Two of these are systematic reviews (one including a meta-analysis) of the available experimental literature, the other is a “phenomenological study” that I happen to find interesting. The studies focus on three drugs (or drug types) — Adderall (a mix of amphetamines and dextroamphetamines); Ritalin (methylphenidate) and Provigil (modafinil) — all of which are alleged to have enhancing effects, and are frequently used by students to improve their educational performance.

Are all these students wasting their time? Let’s see.


1. Repantis et al 2010: Systematic Review of Methylphenidate and Modafinil
The first study I am going to look at is a systematic review and meta-analysis by Dimitris Repantis and his colleagues. Their analysis was concerned solely with the cognitive enhancing effects of methylphenidate and modafinil. The authors found 46 studies on methyphenidate and 45 on modafinil that met their inclusion criteria. All of these studies were reviewed, but some did not have sufficient data to be extracted for their statistical analyses.

Their review focused on a variety of enhancing effects, specifically on: (a) mood; (b) motivation; c) wakefulness; (d) attention and vigilance; (e) memory and learning; and (f) executive functions and information processing. It also focused on different kinds of experimental trial and different classes of experimental subject. In the first instance, the focus was on healthy individuals, i.e. not individuals who were taking these drugs for some illness or disorder (e.g. ADHD). These individuals were then divided-up into two further subclasses — non-sleep deprived and sleep-deprived. The reviewers looked at the effects on such individuals in two scenarios: (i) single-dose trials — in which the experimental subjects were given a single dose of the relevant drug; and (ii) repeated-dose trials — in which the experimental subjects were given more than one dose over a period of time.

The summary findings in relation to methylphenidate were as follows:

Single Dose Trials (Non-sleep deprived): A single dose of methlyphenidate had a strong enhancing effect in relation to one outcome only: memory. No statistically significant effect was found in relation to attention, mood and executive function. A lack of appropriate baseline measures made it impossible to derive a statistical conclusion in relation to the effect on wakefulness. Only one study looked at the effects on motivation and found some subjectively-reported improvement in willingness to engage in mathematical tasks.

Repeated Dose Trials (Non-sleep deprived): Only two of the included studies looked at repeated usage. Consequently, no statistical analysis could be performed. One of these studies actually looked at two drugs and so the effect of methylphenidate was difficult to determine. The other study involved six weeks of usage by elderly healthy individuals and found some positive effect in relation to fatigue, but nothing in relation to the other parameters of enhancement.

Trials in Sleep-Deprived Individuals: Five of the included studies involved sleep-deprived individuals, two of them involved repeated doses. This wasn’t sufficient to perform a statistical analysis. Still, the results of the studies are interesting. No cognitive enhancing effect was found for single-dosage after one night of sleep deprivation, and in fact it was found that use of the drug may give rise to an overconfidence effect. No positive effects of repeated dosage were found for wakefulness in cases of long-term sleep deprivation (greater than 36 hours) and minimal effects were found in short-term cases (around 4 hours).


The authors conclude that no firm conclusion can be reached about the enhancing effect of methylphenidate at this stage (remember, they were writing in 2010), though they accept that there may be some positive effect in relation to memory. They also note that the popular belief that methylphenidate enhances attention is not confirmed by the meta-analysis.

Turning then to modafinil, the summary findings are as follows:

Single Dose Trials (Non-sleep deprived): A positive effect was found in relation to attention and wakefulness for single-dose trials (the latter is not particularly surprising given how modafinil works), though a negative result for wakefulness was also found the further away (in time) from the drug administration. In other words, modafinil may keep you awake for longer, but it may make you more tired at a later point in time. No significant effect was found in relation to mood, memory and motivation. And no analysis could be performed in relation to executive functioning.

Repeated Dose Trials (Non-sleep deprived): Only two of the included studies involved repeated drug administrations. The first found no effect on attentional tasks after an evening and morning administration. The second involved administrations over the course of three days and found both a positive and negative effect on mood (i.e. it made people happier, but also more anxious).

Single Dose Trials (Sleep-deprived): Statistical analysis found a strong-to-moderate positive effect of modafinil in relation to executive function, memory and wakefulness in sleep-deprived individuals. The effect generally declined the longer the period of deprivation continued. No effects were found in relation to mood and attention, and none of the studies looked at motivation.

Repeated Dose Trials (Sleep-deprived): Statistical analysis suggested a strong positive effect of repeated drug administrations on wakefulness (again, not hugely surprising), but no effect in relation to executive functioning and attention. None of the included studies looked at memory, mood or motivation.

The authors conclude that there is evidence of an enhancing effect for modafinil, primarily on attention in non-sleep deprived individuals, and on wakefulness, executive function and memory in sleep deprived individuals. They caution that, with the exception of wakefulness, these positive effects do not seem to be sustained in the long-term (i.e. across repeated drug administrations), and, furthermore, that modafinil may also give rise to an overconfidence effect in sleep-deprived individuals. This is important insofar as modafinil is often touted for use among sleep-deprived professionals, e.g. doctors.


2. Smith and Farah 2011: Are Prescription Stimulants Smart Pills?
The next study I am going to look at is by Elizabeth Smith and Martha Farah. Again, this one is a systematic review of the literature. It is concerned with two major issues: (i) how many people are using these drugs? and (ii) do they actually work? I’ll only be looking at the latter issue in this summary.

Smith and Farah’s review focused on two drug types: methylphenidates (Ritalin) and dextroamphetamines (by itself or in Adderall). They were concerned with alleged enhancing effects on healthy adults, and they reviewed placebo-controlled trials involving oral administration of the relevant drugs. They divided the available literature into four groups, each concerned with the effects of these drugs on different cognitive processes: (i) memory and learning; (ii) working memory; (iii) cognitive control; and (iv) other executive functions.

If you are at all interested in this topic, I would highly recommend reading Smith and Farah’s review. It really is a comprehensive and detailed summary of the available literature (though, bear in mind, there is overlap between this and the Repantis et al review). I cannot do justice to everything they say in this brief summary. I will, however, try my best:

Memory and Learning: The authors looked at 22 studies on the effects of methylphenidate and d-AMP on learning and memory. The studies covered 24 different tasks, some involving declarative memory (i.e. recall of facts), others involving non-declarative (procedural) memory (i.e. skills). They found some weak-to-strong evidence for an enhancing effect on declarative memory tasks, with that effect more pronounced over the long-term. Indeed, many studies suggest that these drugs have little-to-no effect in the short term, but significant effects in the long-term. The findings in relation to non-declarative memory tasks were more mixed, though more inclined to be positive for methlyphenidate than for d-AMP.

Working Memory: Working memory is like the brain’s “scratch pad” - a space in which various bits of information can be kept “online” while performing a given cognitive task. The authors looked at 23 studies on this, involving 27 different tasks. The results are far too complex to summarise fairly because they vary depending on the task the experimental subjects were asked to perform. But in general, the studies are mixed, with some showing positive effects, some showing no effect, and none showing a negative effect. The suggestion from the studies seems to be that the enhancing effect is greater on those who are less able to perform the given tasks in the first place.

Cognitive Control: Cognitive control is, in essence, the ability to override and control the brain’s more automatic, learned responses. The authors looked at 13 studies involving 16 control tasks. Again, the results are complex, but overall there were more null results than positive ones, and one finding of impairment. Careful analysis of the results once again suggests that the positive effects are greatest for those who have poor cognitive control in the first place.

Other Executive Functions: This is just a catch-all for other possible enhancing effects covered by the available studies. The authors looked at five such studies, covering a eight different tasks, including verbal fluency and grammatical reasoning, as well as Raven’s Progressive Matrices and variants on the Towers of London task. Overall, there were only two positive results, but the small number of tests makes it difficult to draw any firm conclusions.

So what is the upshot of all this? Once again there seems to some reasonable evidence for a positive effect on long-term memory recall, and some indication that these drugs work better for people with weaker cognitive performance. Still, the authors are cautious. Over a third of the studies reviewed showed no enhancing effect, and there is the danger that negative results are not being published (due to publication bias).


3. Vrecko 2013: Just how “cognitive” is cognitive enhancement?
The final study I want to look at is a bit different from the preceding two. It is not a systematic review. It is a single study, conducted on 24 students at an unnamed, elite university on the East Coast of the United States. The study is interesting to me because it focuses exclusively on what the students taking these drugs think it does to their ability to study (and engage in other types of academic work), and because it argues that the emotional effects of these drugs may be just as important (if not more important) than the cognitive effects. (I would, however, note that disentangling the emotional from the cognitive can be a tricky business).

I think the most valuable part of this study is the quotations it provides from actual student users, and I want to share some of those quotes here. Before I do that, I need to share something of Vrecko’s analytical framework. Using fairly standard methodological protocols, Vrecko noted that his interviewees’ responses suggested that drugs such as Adderall, Ritalin and Modafinil had four mood-enhancing effects. I’ll cover all four here, and include student quotes that illustrate them along the way.

The first mood-enhancing effect was “feeling up”. By this is meant an increased feeling of energy and well-being. With this improvement, the study participants felt more willing to do the kinds of academic work they needed to get done. For example, one student (Sarah) said:

Everything seems better, and more doable. Sometimes, a lot of the time actually, I'll feel kind of, it's hard to do anything. When I'm walking to the library I'll think, if I didn't have it [Adderall], there's no way I'd get anything done. I'd just sit there in front of my computer, and be not doing anything.

The second mood-enhancing effect, closely related to the first, was “drivenness”. Students who took the drugs felt more driven to do things. As Vrecko puts it, the energy they had “would build up to a point at which there was a surplus or excess that needed to be discharged through activity”. One student described the feeling like this:

I didn't want to stop what I was doing until it was completed up to a certain level of my satisfaction. So I wouldn't ever have to do something and just be, oh, I'm tired, I'll finish it in the morning. I would just finish it.

Ironically, this could have a negative effect too, particularly when the students became driven to do something other than what they should be doing. As one participant put it:

When I take it, I might feel like, “oh, I'm going to start cleaning my room,” or something else. So when it's kicking in, I have to make sure I start telling myself, “ok, it's work time. This is what you've got to do, this is why you're doing it.”

The third mood-enhancing effect was “interestedness”. Several of the participants in Vrecko’s study reported a general inability to get interested in the academic subjects they were taking. But when they took the drugs, things suddenly seemed more interesting:

It just got to where I felt like if I was staring at something I just couldn't take my eyes away from it—it made studying more interesting.

Another positive effect of this was an increased ability to avoid distractions like e-mail, facebook and chatting with friends in the library.

The fourth and final mood-enhancing effect was “enjoyment”. Students who took the drugs found that they were able to enjoy subjects that had previously seemed dull. (This is, obviously, closely allied to the “interestedness”-effect). One student described a particularly remarkable experience while doing an assignment:

I had this paper to write, for a class on art and Romanticism— pretty much the most boring topic I can imagine. Even just finding books in the library annoyed me, like, “why in the hell am I doing this?” But when I started reading [after having taken 20 mg of Adderall], I remember getting just completely absorbed in one book, and then another, and as I was writing I was making connections between them … And I was like, this is really cool, actually enjoying the process of putting ideas together. I hadn't had that before.

In summary, Vrecko’s study is an interesting one. It suggests that one of the main effects of these so-called cognitive enhancing drugs may not be on cognition as such, but, rather, on removing the psychological barriers to doing cognitive work. The study is, however, a small one. The sample of students being interviewed may not be representative (e.g. they may be the “weaker” students who, based on the studies discussed above, seem to get the most positive effect). And there is no placebo control: it’s possible that the drugs themselves are little more than a psychological crutch for the students in question.


4. Conclusion
Let’s now return to the opening question: do the alleged cognitive-enhancing drugs actually work? It’s a difficult question to answer in the abstract. We would need to specify the drug we are interested in and what it would mean for it to “work”. Still, at a general level, I’m slightly more persuaded of their enhancing effects than I was before I read these studies. That may, however, be attributable to my hyper-scepticism prior to doing so.

For me, there are four big takeaways from these studies. This first is that methyphenidate (in particular) seems to have a decent enhancing effect on memory over the long-term. The second is that modafinil seems to have a decent enhancing effect on attention for single doses but not for repeated doses. The third is that the extent of the enhancing effect is likely to greater for those who struggle more in any given cognitive task. And the fourth is that, for students who persist in using them, the major benefit of these drugs may simply be their ability to remove the psychological barriers to getting things done.

Tuesday, September 2, 2014

The Journal Club ♯3 - Street on Why the Price of Theism is Normative Skepticism





This is the third edition of the Philosophical Disquisitions Journal Club. The goal of the journal club is to encourage people to read, reflect upon, and debate some of the latest works in philosophy. The club focuses on work being done in the philosophy of religion (broadly defined). This month we’re looking at the following paper:

Sharon Street “If everything happens for a reason, then we don’t know what reasons are: why the price of theism is normative skepticism” in Bergman and Kain (eds) Challenges to Religious and Moral Belief: Disagreement and Evolution (Oxford: OUP, forthcoming)

Longtime readers of this blog will know that I’m a big fan of Sharon Street’s work in metaethics. Street defends a form of constructivist antirealism, which I find quite attractive. I was thus pleasantly surprised to find that she had also recently written a paper dealing with one of my favourite topics in the philosophy of religion: the problem of evil and its moral implications. It’s a very good paper too, one that I’m sure will provide plenty of fodder for discussion.

In brief, the paper offers a twist on the traditional problem of evil. It argues that theistic belief, coupled with the existence of immense suffering, implies a thoroughgoing normative scepticism. That is: scepticism about what we are (or are not) morally obliged to do. I’ll offer a general summary of the argument below.


1. What is Street’s Argument?
The argument Street wishes to defend is simply stated:


  • (1) If theism is true, then everything happens for a reason.
  • (2) If everything happens for a reason, then we are hopeless judges of what reasons are.
  • (3) But we are not hopeless judges of what reasons are.
  • (4) Therefore, theism is false.


For those of you who might be interested in this kind of thing, the logical structure of this argument involves chained conditionals and the negation of their consequents (if p, then q; if q, then r; not-r; therefore, not-q; therefore, not-p). Street dedicates her attention to premise (2) in the article, but she does say something about the other premises and so we may as well start with them.

Premise (1) can be defended by appealing to the orthodox conception of a monotheistic god. If god is maximally-powerful and maximally-knowing, then it would indeed seem to follow that everything that happens in our world happens for a reason. Why? Because everything that happens is either a direct or indirect consequence of God’s action or inaction. Either God has deliberately caused that event to occur (or he set up the necessary original conditions); or God allows that event to occur (by not intervening). What follows from this? Well, since God, presumably, must act (or omit) with sufficient moral reason (he is the supreme moral agent after all), it would follow that everything happens for a (moral) reason of some kind. I think this is a plausible argument. Some qualification may need to be added in relation to the “everything”-claim, but I still think a sufficient amount of what happens in the everyday world — including those events at the heart of Street’s argument — would fall within the scope of the qualified version.

Premise (3) can be defended on three grounds. The first is that thoroughgoing normative scepticism is deeply implausible: it clashes with some of our most foundational epistemic commitments. This is something Street pushes quite forcefully in the paper. The second is that it is practically paralysing. This is something I looked into a little in my paper on this topic last year, though I was less bullish than Street on the grounds that certain considerations revolving around moral risk/uncertainty could resolve the paralysation problem. The third is that it would ultimately defeat theism itself, since theism is premised on the belief that there exists a supreme morally good being and Street’s argument, if correct, undermines any claim we might like to make about God’s supposed goodness.

That leaves premise (2) as the main bone of contention. We’ll discuss this in more depth below. Before that, I should say something about how Street understands her argument. It is, as she herself notes, just another version of the well-worn problem of evil, one that gets into some very similar issues as does the contemporary debate about sceptical theism. But there are some differences too. First, her argument is neither deductive nor evidential; it is, instead, a reductio. It is claiming that theism has practically and theoretically absurd implications, not that there is some logical inconsistency between the existence of evil and the existence of god, nor that the sheer volume of evil in the world provides evidence against his existence. (For what its worth, I’m not entirely persuaded by this distinction: it seems to me like traditional versions of the problem of evil have those absurd implications as well). Second, her argument is not intended as a reply to sceptical theism. It is a freestanding problem for theists, irrespective of their commitment to sceptical theism.


2. The Practical Dilemma and the Absurdity of Theism
Street’s argument presents the theist with a practical epistemic dilemma. To appreciate the dilemma, we need to appreciate some beliefs that all (or virtually all) theists are likely to share. First, there is the commitment to some sort of moral truth. That is: something about the nature of reality that allows us to meaningfully and appropriately apply labels like “good”, “bad”, “right”, and “wrong” to objects, events and states of affairs. Indeed, god is one of the things to which theists are most inclined to apply such labels. He is a supremely good being who acts in a morally justified manner. Second, there is the (prima facie) commitment to certain standard moral obligations. Street gives the example of intervening to prevent horrific suffering (which she discusses in light of a particular example of horrific suffering) in the paper. To be clear, this obligation is not absolute. Street emphasises that it is always possible for conditions to override that prima facie obligation. But, in the absence of such conditions, the obligation is something we generally agree upon.

The question then is what happens when we are confronting with cases in which god allows horrific suffering to occur. Given the standard conception of god, he could have intervened to prevent such suffering. The fact that he allows this to happen (over and over and over again) has consequences for our epistemic commitments. Street uses the analogy of a man who lives down the road from you and who you believe to be “good”. Suppose one day you learn that the man sat back impassively while he watched his children drown in his swimming pool. Would you still be committed to the belief that he is “good”? Presumably not. Presumably, learning this fact would force you to revise your belief.

Similar revisions are forced upon the theist every time they learn of an instance of horrific suffering that is not prevented by god. Only their revisions are not as straightforward. Prior to learning of the instance they have two epistemic commitments: (a) that god exists and he is good; and (b) there is a moral obligation to prevent horrific suffering. After learning of the instance of evil they will have to revise one of those commitments. Theists will probably seek to revise (b), clinging to the belief that god is good, but Street argues that this is the more implausible view. Revising our commitment to (b) does much more violence to our overall worldview. This is what is being defended in premise (2).

Of course, the argument isn’t fully persuasive yet. The typical theist will try to avoid the horns of this alleged dilemma. They will say that God’s permission of suffering need not impact upon their everyday moral commitments. This is because special circumstances arises (call these “C”) that provide sufficient moral reason for God’s permission of suffering, but that do not affect our moral obligations. Is this reply plausible? That’s the question at the heart of this debate.


3. Why the Dilemma is Significant
Here’s where Street’s paper gets really interesting. She carefully dissects the typical theist reply and argues that, no matter how you slice it, the dilemma remains. To do this effectively, she introduces a number of conceptual distinctions. First, she distinguishes between agent-neutral and agent-relative reasons for action:

Agent-Neutral Reasons: These are reasons for action that apply to all agents, irrespective of who or where they are.
Agent-Relative Reasons: These are reasons for action that apply to specific agents and/or in specific circumstances.

Our moral reasons come in both forms. Sometimes all agents have the same moral obligation, e.g. do not kill another person. Sometimes obligations are limited to a specific subset of agents, e.g. parents must look after their children. God’s reasons for action could also come in both forms. It could be that his reasons for allowing suffering apply to all agents, or it could be that his reasons for action only apply to him (given his unique properties). Since we don’t know which scenario obtains, we have to consider both (actually, we have to consider a third as well: the possibility that his reasons for action are sometimes agent-neutral and sometimes agent-relative).

In addition to this conceptual distinction, Street identifies another that bears directly on our (as opposed to God’s) reasons for action. This is the distinction between fact-relative and evidence-relative reasons for action:

Fact-Relative Reasons: These are reasons for doing or forbearing from some action, in some particular case, that arise because of the facts of the case. For example, if it is the case that tripping a pedestrian has the consequence of preventing him/her from being killed by an oncoming vehicle, then there is a fact-relative reason for tripping the pedestrian. 
Evidence-Relative Reasons: These are reasons for doing or forbearing from some actions, in some particular case, that arise because of the evidence you have at your disposal. For example, in the case of the pedestrian, you presumably could not know that tripping him/her would prevent a fatal accident. All the evidence at your disposal would suggest that tripping a pedestrian is wrong. Consequently, you would have no evidence-relative reason for tripping him/her.

The theist could, perhaps, avoid Street’s dilemma by arguing that god’s permission of great suffering either (a) provides them with no fact-relative reason for questioning their ordinary moral obligations (because they are agent-relative in nature); or (b) even if it does provide them with fact-relative reasons, it provides them with no evidence-relative reason for questioning their ordinary moral obligations. It is this line of reasoning that Street calls into question. She does so by going through the three scenarios mentioned above.

Scenario 1: God’s reasons for action are agent-neutral - In this scenario, god’s permission of suffering does indeed provide us with a fact-relative reason for disregarding our prima facie moral obligations. Nevertheless, the theist will argue that this fact-relative reason doesn’t spill over into the evidence-relative domain. Street says this is wrong. If God’s reasons for action are agent-neutral, then everything that happens is a piece of evidence that bears upon our moral obligations. Using the example of fatal road collisions, she argues that the fact that one such incident occurs (on average) every 52 minutes in the US gives us a reason to think it permissible to permit such incidents. We don’t know exactly why they are permissible, but the fact that they occur — combined with the fact that God’s reasons for action are agent-neutral — is enough to give us an evidence-relative reason for questioning our ordinary moral beliefs. As she puts it herself:

On scenario 1, all of history is converted to a source of evidence about our fact-relative reasons with respect to evils. And as soon as one has evidence that one has a fact-relative reason of a certain kind, one has information of direct practical relevance; in other words, one now has an evidence-relative reason too. On the assumption of scenario 1, we have indisputable evidence that there is, on a regular basis, fact-relative reason for us to permit evils. The only rational response to this evidence is to increase one’s credence, in the case of any given unfolding potential evil, that there is good reason to permit the evil to occur, even though one won’t have any idea in virtue of what.
(p. 11, online version)
So much for that. What about the other possibilities?

Scenario 2: God’s reasons for action are agent-relative - This scenario seems much more promising for the theist. It claims that God’s permitting evil provides us with no fact-relative reason for questioning our ordinary moral obligations. This in turn suggests that we have no evidence-relative reason for questioning those obligations. But this view is problematic. The problems emerge when we ask where we are supposed to learn of our moral reasons? There are two possibilities, either there is some plausible secular moral epistemology, or there is some theistic moral epistemology. We’ll consider the former possibility later on since it is one that most theists will wish to avoid (as it could effectively concede that morality is not grounded, ontologically or epistemically, in god). Let’s focus on the latter for the time being.

If moral knowledge must ultimately be grounded in god, how are we to come by knowledge of our moral reasons? It cannot be done by observing what happens in nature (i.e. what god permits) as that only has relevance for god’s reasons for action, not ours. So we must come by it through some form of divine communication (where this could take a number of forms, e.g. Bible, personal revelation or voice of conscience). But this suggestion is itself highly problematic. For it to work, we would have to have some way of reliably distinguishing false communications from real ones. We would also have to have some way of working out exactly what those communications demanded of us in particular circumstances. I won’t get into the full details here, but Street argues that we have neither of these things. All alleged communications from God are of doubtful provenance or of ambiguous and vague scope. This impacts upon our, evidence-relative, reasons for action. For if we have reason to question all alleged communications from god, we also have reason to doubt whether we have access to moral reasons at all.

So what about relying on a secular moral epistemology? Could a theist successfully pair-up his/her belief in god with a secular approach to moral epistemology? Unwelcome bedfellows though they may be, Street agrees that this is possible. The only problem is that it too leads to normative scepticism. Unfortunately, this part of the paper is pretty sketchy. This is because Street points to other work she has done to complete the argument. First, through her articulation of the “Darwinian Dilemma” she has argued that non-natural normative realism leads to normative scepticism. Second, she argues that normative antirealism isn’t a good fit with theism. The antirealist thinks that our normative commitments are constructed out of certain foundational attributes of our agency. On this account, a normative judgement is true if it withstands scrutiny from our own practical point of view (from our own foundational evaluative attitudes). The problem is that this doesn’t sit well with the notion that God has a moral reason for permitting suffering. To accept this, the antirealist would have to accept that they don’t really understand their own foundational evaluative attitudes. And accepting this would land them in a state of profound normative scepticism. They would no longer be able to trust their own judgment about what is right or wrong. So we end up in the same place.

Scenario 3: God’s reasons are sometimes agent-neutral and sometimes agent-relative: We no longer need to consider this scenario. Since Street has argued that normative scepticism arises no matter what the nature of god’s reasons are, it follows that normative scepticism would arise on scenario 3 as well.

This means that Street thinks her basic contention is correct: believing in theism is not compatible with our ordinary moral beliefs.

So what do people think? Is this a good/interesting argument? What are its weaknesses/flaws?

Comments are welcome below.

Saturday, August 23, 2014

Are we morally obliged to eat some meat? (Part Two)



(Part One)

This is the second part of my series on Donald Bruckner’s article “Strict Vegetarianism is Immoral”. The article claims that if we accept the premises of the leading arguments against factory farming, we may be obliged to eat certain forms of meat (specifically: meat from animals killed in accidental vehicular collisions, aka “roadkill”).

Bruckner defends this view by looking at the two major arguments against factory farming — the factory harm argument and the environmental harm argument — and suggesting that there is a gap between the conclusions of those arguments and the endorsement of strict vegetarianism. I covered his treatment of the factory harm argument in part one. Today, I’ll cover his treatment of the environmental harm argument.

I highly recommend that you read part one before reading this. The basic pattern of argumentation there is very similar to what will be presented here. This is because there are only minor differences between the factory harm argument and the environmental harm argument. Since I’ve already covered the former, I think it’s acceptable to go over the latter in less detail in this post. This may leave you somewhat unsatisfied if you haven’t already read part one. The real novelty in this post will be the range of objections and replies covered toward the end.


1. The Environmental Harm Argument
The environmental harm argument says that purchasing and consuming factory farmed meat is wrong because it harms the environment. The full argument looks like this (numbering follows on from part one):


  • (12) Factory farming causes extensive harm to the environment.
  • (13) This harm is unnecessary (we do not need factory-farmed meat to survive).
  • (14) Therefore, factory farming causes extensive and unnecessary harm to the environment.
  • (15) It is wrong to knowingly cause, or support practices that cause, extensive and unnecessary harm to the environment.
  • (16) Purchasing and consuming factory-farmed meat supports a practice that causes extensive and unnecessary harm to the environment.
  • (17) Therefore, it is wrong to purchase and consume factory-farmed meat.


This argument is almost identical in structure and content to the factory harm argument. Consequently, I won’t discuss its premises in any great detail. Suffice to say, Bruckner is just as willing to accept the premises of this argument as he was the premises of the previous argument. The only thing worth discussing is premise (12) and the precise nature of the “extensive” environmental harm caused by factory farming. Bruckner has two main examples in mind. One is the pollution caused by farming. He gives four examples of this: CO2 from farm equipment; methane from the animals; manure run-off; and nitrogen run-off from fertiliser. Second is the problem with the overconsumption of natural resources: raising crops to feed animals is less efficient and more wasteful than eating those crops directly.

Given that this argument is practically identical to the factory harm argument, it is no surprise to find that Bruckner’s response is practically identical. Once again, he points out that there is a gap between the conclusion and the endorsement of strict vegetarianism. That gap would have to be plugged by something akin to the following premise:


  • (18) The only less-harmful (to the environment) alternative to eating factory-farmed meat would be strict vegetarianism.


But any such premise would presuppose a false dichotomy. There are meat-eating alternatives to factory farming that involve less harm to the environment. The roadkill example is to the fore once more. Of course, that isn’t a hugely interesting conclusion since it only suggests that eating roadkill is permissible. The more robust conclusion is that eating roadkill might be obligatory. That conclusion can be reached if we stick with the moral principle that we ought to avoid causing unnecessary harm to the environment and add the factual claim that the harm done to the environment by eating the available roadkill is less than the harm done to the environment by producing the same amount of nutrition through vegetable farming. Bruckner thinks that this factual claim may be supported on the grounds that the environmental harm done by the fuel expended in transporting and butchering roadkill is likely to be less than the environmental harm done by growing an equivalent volume of vegetables.

So once again, we have an argument for thinking that we might be obliged to eat (at least some) meat. Are there any major objections to this argument?


2. Objections and Replies
Bruckner looks at six different objections in the article. I’ve already raised an objection in part one that he did not address (as well as a possible reply). I’ll add another objection that Bruckner seems to have overlooked today as well. That makes for eight objections in total, seven of which will be dealt with below.

The first objection is:

Slippery Slope Objection: Bruckner’s argument simply encourages us to eat meat which, given our weak-willed nature, will lead us to eat more and more meat. Best to cut out the practice entirely in order to avoid the slide down this slippery slope.

Of course, when it comes to meat-eating, we are already at the bottom of the slippery slope. A gradual ascent out of the mire might be more successful than an abrupt transition. Even still, there are problems with the slippery slope argument if you accept it on its own terms. First, it seems to commit all the sins of fallacious slippery slope arguments. Bruckner likens it to an argument for celibacy based on the (absurd?) notion that having sex with one partner will lead you to have sex with many. Second, it relies on some pretty outlandish armchair psychologising which illegitimately foists the burden of proof onto the defender of Bruckner’s position. They are forced to argue that people won’t be tempted in this way, even though there is no evidence to suggest that they would be in the first place. Finally, the objection implies a false dilemma: it implies that the only way to get more meat would be through factory farming, but as we saw in part one there are other means of doing this that may be more acceptable.

I’ll add in my own objection here:

Perverse Incentive Objection: By providing people with an “excuse” to eat animals that are accidentally killed in vehicular collisions, Bruckner’s argument will provide an incentive to people to take less care while driving (to be more “accidental”).

I’m actually surprised Bruckner doesn’t deal with this in his paper as it seems like the strongest objection to his position. To support it, I have in mind analogies with past alterations in people’s incentives. For example, the claim (common among economists) that compulsory seatbelt wearing actually increased the total number of car accidents when it was first introduced (though, to be fair, it also reduced the number of fatal car accidents). It seems to me like Bruckner’s policy could easily have a similar incentive effect: it could encourage people to take less care while driving. And surely that would be a bad thing: it would lead to more unnecessary (albeit “accidental”) harm being done to animals (and possibly humans). I’m not sure what the response would be to this. I guess you could argue that the incentive effect is unlikely because people wouldn’t run the risk of a collision with a deer, elk or moose. But I’m not so sure about that.

The third objection is:

Fences Objection: The argument doesn’t imply that we should eat roadkill; rather, it implies that we should do more to protect animals and ensure that they are not killed in accidental vehicular collisions. One way of doing this would be to put up more fences along roads.

Bruckner responds by saying that this would be pretty costly (and probably politically unfeasible). Furthermore, it would only be something to be considered in addition to his argument, not instead of it. In other words, we would still be obliged to eat any roadkilled animals prior to the construction of these fences (and after, if they are still being killed despite our best efforts).

This leads to another, more general, objection:

Absurdity Objection: The argument has absurd implications. It means we shouldn’t do anything that risks unnecessary harm to animals. So, for example, we shouldn’t drive our cars to the cinema because cinema trips are unnecessary and increase the risk of harm to animals. Likewise, we should engage in all manner of other “crazy” freegan practices like foraging in dumpsters and eating other dead, wild animals.

Bruckner tries to sidestep this objection. He does so by pointing out that he is not directly arguing for the thesis that eating roadkill is obligatory. Instead, he is arguing that if the standard arguments against factory farming are correct, then eating roadkill is obligatory. The conditional nature of the argument is important. If it has absurd implications, that could be because the arguments against factory farming are flawed. Bruckner says no more about this in the article.

A less absurdist objection would be the following:

Health Risk Objection: The meat from animals killed in vehicular collisions is not perfectly healthy; it poses a greater health risk than eating vegetables.

This is pretty contentious and gets us beyond the scope of the original objections to factory farming (which weren’t about human health at all). The empirical data on vegetarian versus meat-eating diets is pretty messy (from what I’ve seen), with no clear evidence favouring one over the other. Still, Bruckner argues that venison is pretty lean and low in saturated fat. He notes that some deer carry the cervid version of BSE, but there is no evidence of transmission to humans (that could be because of low consumption though). Also, he is not arguing that we eat old or badly decayed animals. He is only arguing that we eat freshly killed animals.

That brings us to the penultimate objection:

Scavenger Objection: Eating roadkill is not harm free. Doing so deprives scavengers of food.

Bruckner argues that this isn’t quite true. In the US, roadkill is typically removed by local authorities and dumped in a landfill. So the meat is being wasted anyway (though perhaps there are scavengers, such as rats, at these landfills?). Furthermore, he suggests that certain parts of the animal carcasses could be left for scavengers (e.g. viscera and internal organs).

And the final objection then is:

Disgust Objection: Eating roadkill is disgusting

Of course, this isn’t really an objection; it is an emotional response. Even if people did find it disgusting, this wouldn’t mean that it was not obligatory. We are often obligated to do disgusting things.


3. Conclusion
So that’s it. To briefly recap, the two main arguments against factory farming may be persuasive, but they fail to support the strict vegetarian lifestyle. This is because there is a gap between their conclusions and the endorsement of strict vegetarianism. This gap can only be plugged by appealing to a false dichotomy: it’s either strict vegetarianism or factory farmed meat-eating.

In reality, there are other forms of meat-eating that may not fall foul of the factory farming arguments. Quite the contrary in fact. Some forms of meat-eating might be obligatory if we endorse the premises of the arguments against factory farming. Bruckner argues that this is particularly true of eating roadkill.

I think the perverse incentive objection is the major challenge to this position: if Bruckner is right, motorists will be given an incentive to take less care when driving. Although this mightn’t seem like a significant problem in any one case, the statistical impact could be great. Of course, we don’t know for sure at this point in time.

Friday, August 22, 2014

Are we morally obliged to eat some meat? (Part One)




I’ve recently been looking into the ethics of vegetarianism, partly because I’m not one myself and I’m interesting in questioning my position, and partly because it is an interesting philosophical issue in its own right. Earlier this summer I looked at Jeff McMahan’s critique of benign carnivorism. Since that piece was critical of the view I myself hold, I thought it might be worthwhile balancing things out by looking at an opposing view.

That’s why Donald Bruckner’s article “Strict Vegetarianism is Immoral” caught my eye. The title and the opening paragraph suggested that it might offer a robust defence of meat-eating. Admittedly, that was what I gleaned at a first glance. After reading the full thing, I realised I was wrong. The paper doesn’t offer a counterpoint to McMahan’s argument. In fact, it may actually complement and support it.

This made the experience slightly disappointing from my perspective, but my disappointment shouldn’t be taken to impugn Bruckner’s piece. It needs to be judged on its own merits, and it does present an interesting argument. I want to go through that argument over the next two posts. In brief outline, Bruckner claims that the typical vegetarian arguments against factory farming do not support a strict vegetarian position (where that means eating vegetables to the permanent exclusion of meat, and probably fish — terminology is a bit tricky here). In fact, properly understood, those arguments imply an obligation to eat at least some kinds of meat.

Bruckner defends this view by outlining what he takes to be the two most popular arguments against factory farming — the factory harm argument and the environmental harm argument — and pointing out a gap between their conclusions and the strict vegetarian thesis. This means his analysis divides neatly into two halves. This is fortuitous since it means I can divide up my discussion over two posts. I start today by looking at the factory harm argument.


1. The Factory Harm Argument
The factory harm argument defends the view that eating and consuming factory-farmed meat is wrong because of the harm it does to the animals in the factory farms. The argument works like this:


  • (1) Factory farming causes extensive harm to animals (“extensive” in both scope and severity: lots of animals are harmed and they are harmed in severe ways).
  • (2) The harm in question is unnecessary (in the sense that humans do not need the protein/food resources provided by the animals who are harmed).
  • (3) Therefore, factory farming causes extensive and unnecessary harm to animals.
  • (4) It is wrong to knowingly cause, or support practices that cause, extensive and unnecessary harm to animals.
  • (5) Purchasing and consuming factory-farmed meat supports a practice that causes extensive and unnecessary harm to animals.
  • (6) Therefore, it is wrong to purchase and consume factory-farmed meat.



Now, as it happens, Bruckner doesn’t dispute any of the premises of this argument. Still, it is worth briefly going through them, if only for those who are unfamiliar with the debate. Premise (1) can be supported by simple arguments about animals’ capacity to suffer and by examples of practices that cause them to suffer. Bruckner gives a couple: cutting off the beaks of young hens; raising them in conditions where ammonia levels are so high that they suffer from chronic respiratory illnesses; castrating pigs and cattle without anaesthetic; and keeping pregnant pigs in crates so small they can barely move. Maybe people would dispute some of these — I’m not sure — but let’s assume there are enough similar practices taking place to justify premise (1).

What about premise (2)? This would seem to be true from observation and scientific study: there are plenty of perfectly healthy vegetarians and vegans out there, and no evidence suggests that a healthy vegetarian life is impossible. There may be some individuals who, thanks to food allergies or other restrictions, find it impossible to live without meat, but they would seem to be relatively few in number. Furthermore, their existence would not threat the general claim that factory farming is unnecessary.

The first conclusion (3) then follows as a matter of course. This brings us to premise (4). It doesn’t seem necessary to dwell on this since it is a basic principle of morality, and it doesn’t really matter which conception of harm you have in mind, or whether you are a consequentialist or deontologist. All these positions would all support something like this principle. That leaves us with premise (5), which is probably the most contentious one. Some people would be inclined to argue that an individual’s decision to purchase and consume meat will have a negligible impact on the general practice of factory farming. This might suggest that the individual decision neither causes nor supports the practice of factory farming. This is something that has been discussed in the literature, and there are various responses to it. Nevertheless, we will set them aside, since that is what Bruckner does, and assume it to be true.

This means we embrace the overall conclusion. But does it mean that we also embrace strict vegetarianism? No. As Bruckner points out, there is gap between the conclusion and the fullscale embrace of the vegetarian diet. To plug that gap, you would need to insert something like the following premise:


  • (7) The only, non-harmful, alternative to eating factory-farmed meat is strict vegetarianism.


But any such premise would be false. There are in fact alternatives to eating factory-farmed meat.


2. Roadkill and the Obligation to Eat Meat
Three such alternatives are mentioned in Bruckner’s article: (i) eating humanely-reared animals; (ii) hunting, killing and eating wild animals; and (iii) eating roadkill animals (i.e. animals accidentally killed in vehicular collisions). Bruckner has another article dealing with (i) and (ii), and he acknowledges that both could involve some harm and wrongdoing to animals, even if it is not on the same scale the harm and wrongdoing involved in factory farming. For this reason, he focuses his argument on the third option.

He starts by clarifying and adumbrating some facts about roadkill. I found this part of the paper pretty interesting because I was unaware of the statistics on roadkill. For starters, he is not talking about eating squirrels or foxes or other small animals that might be killed in accidental vehicular collisions. He is talking about eating freshly-killed, large animals like deer, elk and moose. He notes that there are over one million insurance claims based on collisions with such animals each year in the US, and many more such collisions go unreported (anything from 50% to 600% more, according to some estimates). Consequently, he conservatively puts the figure at about 2.1 million roadkill deaths per year. Now, assuming all such deaths are deer (the smallest of the three) he reckons this would yield about 41.3 million pounds of meat per year. This would be equivalent to the meat currently-consumed by about 300,000 American meat-eaters. That might not seem like a lot, but it is not negligible and, in any event, Bruckner isn’t arguing for continuing current meat-eating practices. He is just arguing that some meat-eating is acceptable.

As I say, I find these statistics interesting, but I would like to raise two sceptical notes. First, it isn’t clear to me that the figure for insurance claims is based on actual animals deaths, or just damage from collisions. Bruckner doesn’t say enough about it in the piece. Second, it isn’t clear to me that all these deaths are strictly accidental. That might seem like a reasonable assumption — who would want to collide with such an animal? — but we may need to be cautious here. I’ll return to this point in part two.

Anyway, moving on. Bruckner thinks it is pretty obvious that eating such roadkill (in addition to vegetables, of course) provides an alternative to strict vegetarianism. But this isn’t a big deal since most vegetarian philosophers accept the permissibility of eating roadkill (Singer certainly does, and Bruckner cites others who do as well). What is less obvious is whether we have an obligation to do so. This is what Bruckner wishes to argue.

At this point, he appeals to an argument originally made by Steven Davis in 2003. Davis believed that vegetarians were too readily assuming that strict vegetarianism was the least harmful option to animals. In doing so, they ignored the number of animal lives lost in vegetable farming. Thus, in cultivating land, planting and fertilising seeds, and harvesting crops, it is acknowledge that animals are routinely killed (e.g. field mice, rabbits, amphibians, ground-nesting birds etc.). Davis argued that more harm would be done by this than by raising herbivores on pasture, and so strict vegetarianism wasn’t necessarily the preferred option.

Davis’s argument for this was highly contentious, based on disputable evidence and estimates. But his particular argument is not what interests Bruckner. It is the general style of the argument that is interesting. It suggests that if there is some practice which is less harmful than strict vegetarianism , we should prefer that. In fact, because we are obligated to avoid unnecessary harm to animals, we should definitely do that. Bruckner thinks this is true of eating roadkill. The harm done by this practice is less than the harm that would be done by getting the same amount of additional nutrition from vegetable farming.

In other words, Bruckner endorses something like the following argument:


  • (8) We are obligated to avoid anything that causes, or supports the cause of, unnecessary harm to animals (this is simply a modification of premise (4) from the factory harm argument).
  • (9) Strict vegetarianism would cause harm to animals (through land cultivation practices).
  • (10) At least some of this harm is unnecessary: we could get some of that nutrition from roadkill.
  • (11) Therefore, we are obligated to eat roadkill (and not to endorse strict vegetarianism).


I say he endorses “something like” that argument because at no point in the article does he actually set out a formal argument for his position. Still, I think this captures the basic elements of it. His point is that if we endorse the premises of the factory harm argument — in particular the central moral premise of that argument, premise (4) — we are obligated to eat at least some meat.

This is certainly an interesting claim. I’ll be covering the main objections to it in part two (after outlining the environmental harm argument). But there is one objection I thought might be worth flagging here. It’s a pretty obvious one. In making this argument, Bruckner may be presuming an overly narrow conception of strict vegetarianism. He seems to suppose (in premise (9)) that the only way for a strict vegetarian to get enough vegetables to live is through farming practices that will be harmful to animals. But maybe this isn’t the case? Maybe there are less harmful farming practices? Or maybe they could be foragers or somesuch?

I suspect Bruckner would respond by saying that either (a) those practices wouldn’t supply enough nutrition or (b) it still wouldn’t defeat his point about eating roadkill. For if there are all these animals being killed accidentally, and if they could provide us with perfectly good nutrition, it would still seem pretty silly to waste them. This becomes more persuasive when we consider the environmental damage argument, which is exactly what we’ll do in part two.


Wednesday, August 20, 2014

The Journal Club ♯2 - Karlsen on God and the Benefits of Existence



Welcome to this, the second edition of the Philosophical Disquisitions Journal Club. The goal of the journal club is to encourage people to read, reflect upon, and debate some of the latest works in philosophy. The club focuses on work being done in the philosophy of religion (broadly defined). This month we’re looking at the following paper:




The paper tries to fuse traditional concerns about the problem of evil with recent work in population ethics. The result is an interesting, and somewhat novel, atheological argument. As is the case with every journal club, I will try to kick start the discussion by providing an overview of the paper’s main arguments, along with some questions you might like to ponder about its effectiveness.


1. The Dialectical Context
One of the key features of Karlsen’s paper is his attempt to embed his argument in the debate about the problem of evil. It may be insulting to recapitulate the basic features of that debate here, but some scene-setting is in order. So here we go…

Traditionally, the problem of evil can be run in two different ways. The logical problem of evil (LPE) tries to argue that there is a logical (or maybe metaphysical) incompatibility between the existence of any amount of evil/suffering and the existence of God; the evidential problem of evil tries to argue that the existence of evil/suffering provides evidence against the existence of god (with the weight of that evidence going up in direct proportion to the amount of evil in the world). For better or worse, Karlsen concentrates his energies on the logical version.

In doing so, he looks at the classic rebuttal of the LPE from Alvin Plantinga. Plantinga famously pointed out that the atheist’s threshold for success in this argument is pretty high. The atheist needs to show that God could never have a morally sufficient reason for creating beings that suffer, i.e. that there is no possible world in which the existence of God is compatible with the existence of suffering. But it is doubtful that the atheist could ever successfully show this. Indeed, there is good reason to think that there is a least one possible world in which the co-existence of God and suffering is not incompatible. To prove this point, Plantinga deploys his famous “Free Will Defence” (FWD), which argues that human free will is a good conferred by God on human beings, and that this particular good may entail the existence of suffering in at least one possible world.

Karlsen takes a broad perspective on this debate, using the back-and-forth between Plantinga and defenders of the LPE as an illustration of a problem he has with other proposed theodicies. The problem is that theists participating in this debate tend to assume that (a) God is a moral agent whose behaviour can be judged according to moral standards; and (b) that God had a morally sufficient reason for creating human beings who suffer. Karlsen doubts that both assumptions can be consistently sustained. He thinks that theists are working with an impoverished understanding of what counts as a morally sufficient reason for creation and are neglecting the implications of one widely accepted moral standard.


2. The Argument: God Did Not Benefit Us through Creation
So how does Karlsen’s argument work? It starts with the claim that there is one moral principle that nearly everyone can agree on. This is the principle of benevolence. In broad terms, this principle holds that a moral agent ought never to harm another being with moral status; they ought only to benefit them. More precisely (and for the purposes of Karlsen’s argument) it entails the following:

Principle of Benevolence: requires that harm be avoided unless its avoidance implies greater harm or deprivation of benefits that outweigh the harm.

Under this formulation, it is not the case that a moral agent can never harm another being, it is just that they cannot harm another being unless that harm is outweighed by greater benefits. There are some classic analogies that help us to understand the idea. If I am a parent, I can justifiably bring my child for a painful round of vaccinations (or other medical therapy). This is because the harm inflicted in the course of those treatments is outweighed by the benefit they bestow on the child’s long-term health.

All of this seems pretty reasonable, and unless one is a fideist or Ockhamist, one would probably agree that God is also bound by the principle of benevolence. Nevertheless, this gives rise to a problem. For, according to Karlsen, it is not the case that God actually benefitted us through the act of creation. Indeed, he may have harmed us by doing so. Consequently, he breached the principle of benevolence. And surely no being worthy of the name “God” would have breached this principle? To put these thoughts into a more formal argument:


  • (1) A true God would meet any requirement entailed by the principle of benevolence (because of omnipotence, omniscience and omnibenevolence)
  • (2) Benevolence requires that harm be avoided unless its avoidance implies greater harm or deprivation of benefits that outweigh the avoided harm.
  • (3) Existent beings that suffer are harmed by existence.
  • (4) The never-existent cannot be deprived of benefits.
  • (5) Therefore, a true God would not have created beings that suffer.
  • (6) There do exist beings that suffer.
  • (7) Therefore, God does not exist.


(Note: this is my reconstruction of the argument. It differs slightly from the more cumbersome version set out by Karlsen in the article, but I think it retains the basic logic and the key premises).

What should we make of this argument? Obviously, there are a variety of ways for the theist to respond. They could deny (1) or (2), holding that God is not bound by the principle of benevolence or that we don’t have the right understanding of that principle. This would be pretty drastic, either amounting to a form of Ockhamism (“God determines his own moral standards”) or sceptical theism (“there are beyond-our-ken moral reasons for God doing what he does”). Both of those positions have their problems, some of which I have addressed in the past.

The more plausible theistic response would be to deny premise (4). After all, that premise relies on a controversial thesis, viz. that coming into existence cannot be a benefit to the being that comes into existence. Furthermore, that premise is crucial to the inference to the conclusion stated in premise (5). It is only if creation benefits the non-existent that the suffering in existence is morally justified. Let’s look at what can be said about this thesis now.


3. Is Existence a Benefit?
It is very common for people to assume that existence is better than non-existence; that being alive is, all things considered, a benefit to the living. As Bertrand Russell once put it, this is the reason why children are “exhorted to be grateful to their parents”. But how credible is the idea? At this point in the paper, Karlsen reviews a number of debates and positions in population ethics. I won’t go through all of them here. I’ll just highlight some of the main conclusions.

First, and following the views of Nils Holtug, there does seem to be one obvious way in which we can deny premise (4). We can say that if we cause a person to come into existence whose life is, on balance, worth living, we are benefitting them. And vice versa. Thus, if we cause a person to come into existence and their life is nothing but unending misery and suffering, we are not benefitting them; but if their life is full of joy and satisfaction, then we are. This view assumes symmetry between the harms and benefits of existence and non-existence. In other words, it assumes that existence can be, on balance, beneficial, and that non-existence can be, on balance, a deprivation of benefits (and vice versa). Call this the symmetry thesis.

The symmetry thesis is somewhat attractive, and does seem to track how people think about the benefits of existence. Still, it has a number of problems. For starters, it would seem to run into the non-identity problem. This problem has to do with the fact that a subject needs to exist before we can make claims about what will harm and/or benefit that subject. All talk about the harms and benefits of non-existence seems odd because there is no subject in existence who can be harmed or benefitted. Holtug (and others) get around this problem by claiming that we are not talking about individual agents but rather classes of possible agents (i.e. we are not talking about different states of the same person but about different states of affairs in general). Thus, it is not that existence or non-existence is beneficial for a particular agent, but rather that it can be for agents as a general class. This may skirt the non-identity problem, but it then runs directly into another one. The general class of non-existent agents is very large indeed. It could be that we are failing to benefit all members of this general class by not bringing them into existence. Should we be concerned? Should there be a massive push to ensure that all agents with potentially beneficial lives are brought into being? This would seem odd indeed (Parfit’s “repugnant conclusion” becomes relevant here).

There are various possible refinements to the symmetry thesis, some of which are discussed by Karlsen in the article. In the end he thinks they all run into the same basic problem: they seem to lead to absurd (and repugnant) views about our obligation to procreate. For if non-existence can be harmful (either in person-affecting terms or in impersonal terms) it would seem like a moral agent would have to do something about it. This leads him to consider the case for the alternative asymmetry thesis. According to the asymmetry thesis, there is reason to think that non-existence is very different from existence. Specifically, there is reason to think that non-existence is not harmful (or benefit-depriving).

In defending this view, Karlsen appeals to Christoph Fehige’s “anti-frustrationism” thesis. This thesis starts from the presumption that what matters in terms of harm and benefit is preference satisfaction. A person is benefitted when their preferences are satisfied and they are harmed when their preferences are frustrated. At first glance, this would seem to once again entail the symmetry thesis. After all, when we look at existence, we can say that it is impersonally good if people exist and have their preferences satisfied; contrariwise, when we look at non-existence, we can say that, from an impersonal perspective, it is bad that no preferences are being satisfied.

But that is not the right way to look at it. Not according to Fehige anyway. For there is a critical difference between the existent state and the non-existent one. In the existent state, agents are in existence and have certain preferences. It is then, of course, harmful if those agents have their preferences frustrated. But that is only because they already exist and have preferences. In the non-existent state, no agents ever come into existence with preferences. Consequently, there is no preference frustration in the non-existent state. This is crucial because, according to Fehige’s account, what matters when it comes to evaluating the moral worth of different states of affairs is the amount of preference frustration going on in those states of affairs, not the amount of preference satisfaction. A world in which no agents exist and no preferences are frustrated is, on his view, on a par with a world in which lots of agents exist and their preferences are satisfied. This is the anti-frustrationist thesis.

This then gives Karlsen what he needs to defend premise (4) of his argument. If anti-frustrationism is true, then it is also true that the non-existent are not being deprived of benefits. It would then follow that God lacked a sufficient moral reason to bring agents into existence, particularly ones that seem to suffer greatly. Consequently, we have reason to suspect that God would not bring such agents into existence and so the fact that we exist and we suffer gives reason to think that God does not exist.


4. Questions
I have to say, I like several features of Karlsen’s argument. I like how he draws from the literature on population ethics, and I like how he draws our attention to the issue of God’s moral reasons for bringing us into existence. Nevertheless, I find the paper a little bit messy, like it was trying to do too much in too short a space. Here a couple of questions I think might be worth pondering:


  • 1. Does Karlsen succeed in connecting his argument to the traditional debate about the problem of evil? More precisely, does he succeed in showing that most theodicies rely on the assumption that God benefitted us by bringing us into existence?


  • 2. Is anti-frustrationism a plausible moral thesis? The claim is that it follows from general considerations of welfare and resolves certain problems with other welfarist view, but does it really? Does it lead to problems of it’s own?


What do you think? Please fell free to comment below.