Sam Harris on Religious Experience

Over the holidays I watched most of the video of a dialogue among Richard Dawkins, Dan Dennett, Christopher Hitchens and Sam Harris (the “Four Horsemen” of the recent mini-boom in books criticizing religion by atheists). There was a brief discussion near the beginning led by Harris which I wanted to highlight (the transcript is here). One thing I have liked about Harris, who is pursuing a doctorate in neuroscience in his day job, is his respect for the challenge that the “hard problem” of first person conscious experience poses for a conventionally materialistic worldview. In the video, he discusses an obstacle to the ability of the atheists to win the hearts and minds of believers: the phenomenon of what is traditionally referred to as “religious” experience.

Here’s the excerpt:

[Harris] Well. I think there's one answer to that question which may illuminate a difference, or at least the difference that I have, I think, maybe with all three of you. There's something about … I mean, I still use words like "spiritual" and "mystical" without furrowing my brow too much and, I admit, to the consternation of many atheists. I think there is a range of experience that is rare, and that is only talked about without obvious qualms in religious discourse. And because it's only talked about in religious discourse, it is just riddled with superstition. And it's used to cash out various metaphysical schemes which it can't reasonably do. But clearly people have extraordinary experiences. Whether they have them on LSD, or they have them because they were alone in a cave for a year, or they have them because just happen to have the neurology that is particularly labile that allows for it, but people have self-transcending experiences. And people have the best day of their life where everything seemed, you know, they seemed at one with nature. And for that, because religion seems to be the only game in town in talking about those experiences and dignifying them, that's one reason why I think it seems to be taboo to criticise it, because you are talking about the most important moments in people's lives and trashing them, at least from their view.

[Dawkins] Well, I don't have to agree with you, Sam, in order to say that it's a very good thing you're saying that sort of thing, because it shows that, as you say, religion is not the only game in town when it comes to being spiritual. It's like it's a good idea to have somebody from the political right who is an atheist, because otherwise there's a confusion of values which doesn't help us. And it's much better to have this diversity in other areas. But I think I sort of do agree with you. But even if I didn't, I think it was valuable to have that.

[Harris] Right.

[Hitchens] If one could make one change, and only one, mine would be to distinguish the numinous from the supernatural.

[Dawkins] Yes.

[Harris] Right.

[Hitchens] You had a marvelous quotation from Francis Collins, the genome pioneer, who said, while mountaineering one day, he was so overcome by the landscape, and then went down on his knees and accepted Jesus Christ. A complete non sequitur.

I agree with the spirit of that last comment by Hitchens – I find it extremely implausible to think that someone who has not been exposed to Christianity will ever have any vision or experience specific to it. People have experiences marked by powerful positive feelings of transcendence, unity, etc. and then interpret them through the familiar conceptual lens which appears to do justice to them.

Where I go further than Harris does here is that I see this as a special example of the general problem of first person experience. People mostly don’t think experience is an accidental part of an essentially non-experiential reality. They think experience is something fundamental, and I agree. The trick is to see that one can have a worldview which privileges experience in this way without otherwise embracing supernatural entities or interventions.

Smolin and Rovelli Respond to Edge's Annual Question

The Edge annual question for this year, asked of over 100 scientists, journalists, and assorted intellectual types was “What have you changed your mind about and why?” I checked out the responses of some of the physicists who participated.

Lee Smolin’s entry discusses the impact that his evolving views about time have had on his quantum gravity work. His earlier research was on loop quantum gravity (LQG), which as it seeks to quantize the geometry described by general relativity results in a basically “timeless” theory (unlike quantum mechanics itself, where a background time is part of the picture). Now, however, Smolin has come to believe that time, in the guise of causality, needs to be a fundamental element of a theory. This leads him to be interested in theories where causality is built in at the ground level and where the more familiar “laws of physics” (general relativity and quantum field theory) are emergent features which may themselves evolve in time (for more see my previous post on Smolin).

It was interesting to me to note a contrast with fellow loop quantum gravity pioneer Carlo Rovelli. Rovelli’s entry was about his realization that the standard interpretation of quantum mechanics made sense, but not if you tried to apply it to the whole universe. The insight led to his formulation of relational quantum mechanics a bit over 10 years ago. Now, from my outsider’s perspective, it seems that Rovelli’s relational qm is philosophically in harmony with Smolin’s interest in “emergent” quantum gravity approaches which start with a causal network of quantum systems at the fundamental level. However, while Rovelli says that relational qm has “affected substantially” his quantum gravity work, in his case, it appears this involves inspiring the ongoing extensions to the loop program rather than working on approaches which have a different fundamental starting point.

Finally, relevant to this topic is John Baez on why he decided to stop working on quantum gravity.

Mike's Concluding Thoughts on Schopenhauer

Below is the last part of Mike Wiest's review of and reflections on The World as Will and Representation, Volume One. The first two parts are here and here.

Well, I guess you can tell because I wrote this that I was impressed by Schopenhauer’s book. It seems to me to belong among the greatest works of philosophy ever, and to be the first (only?) time a major Western philosopher really absorbed the Eastern insights. But I may be still in the infatuated stage.

I guess the theory of determinism and freedom I gleaned from Volume 1 is not entirely satisfactory, but I think it is more than the usual semantic sophisms that attempt to make freedom and determinism compatible. Although S comes off as mainly determinist, I think it is an open question whether his scheme could be adapted to a quantum ontology (for example if quantum events are determined by nonlocal factors scattered all over spacetime including in the future). Maybe I’m also more open to him than most determinists because he admits and explains a much greater range of phenomena, such as the claims and behavior of mystics, than hard-core 19th-century-style determinists.

I fell in love with Kant when I read his abridged Critique of Pure Reason, I think mainly because of my pet interest in quantum and mental holism, and he was constantly talking about the various unities of the mind which people seem not to appreciate anymore. But reading S gave me a perspective from which to realize that a lot of Kant really is obscure (and according to S actually motivated by a perverse desire to symmetrically fill out tables of 12 categories), and a pretty clear and intuitive way to separate the baby from the bathwater. So S boiled down Kant’s baroque a priori subjective framework to basically spacetime and causality. I think this might be a great insight that survives the invention of non-Euclidian geometry and relativity theory. Why? Because, for example, it does seem that our perceptual intuitions really are in Euclidian space, and when we envision curved spaces we do so in Euclidian space, such as a 2D spherical surface in 3D.

That said, it is still hard to go along with S (or Kant) when he concludes that there is no space or time for the thing-in-itself. That is, it is relatively easy to accept that each of our subjective worlds are subjective brain constructs, but to take the next step to say that real objects are not objects at all, and don’t exist in an external spacetime, even though we can independently experience them and “cross-check” their existence, is difficult. [cf. Zen koan #43 Shuzan’s staff: “Shuzan held up his staff before the assembled monks, saying “If you say this is a staff, you oppose its reality. If you say this is not a staff, you negate the fact. I ask you, what is this?”] Maybe the relational interpretation of quantum mechanics gives us a framework for realizing S’s version of “empirical realism, transcendental idealism.”

Before reading S, I thought that maybe his pessimism was overstated by religiously-minded critics as a lazy way of dismissing his theory. Now I have to admit that his pessimism is pretty deep. It’s almost funny at times—at one point he even remarks how depressing the discussion is getting. If he gives up the purposelessness of the will, though, he will lose a major advantage over every optimistic philosophy—namely, that the problem of evil and suffering is not really a (philosophical) problem for him. (It remains a personal problem.) There is no good or even intelligent God to be paradoxically responsible for evil and suffering.

On the other hand, he is arguably no more pessimistic than Buddhism, since he affirms a path to a form of salvation. Also, the will in his theory seems to harbor a hidden dynamic—or will—towards realization, where realization means individuation and objectification but also enlightenment. Thus, although he argues against the notion of any permanent progress, his own contribution to the real progress of philosophy might be seen as part of a universal evolution towards “universal enlightenment” or “heaven on earth.” It’s a bit of a stretch…

Bottom line: In terms of his utility for us as students of the mind-body problem, I don’t think we get any new ideas about how the line between conscious and unconscious brain processes would show up in biology. What we may get is a (provisionally) consistent metaphysics that relates mind and matter without elimination, and explains the real basis of our moral sentiments. It’s also a pre-Freudian explicit theory of the unconscious. If you’re into this kind of thing, it’s an exhilarating ride!

Markopoulou Article

The Foundational Questions Institute (home page here) has a "community" web-page which features articles and blog posts relating to the work of those who have received grants. They have put up an article (in pdf) on Fotini Markopoulou and her quantum gravity program. (my posts on Markopoulou's work in reverse chronological order are here, here, and here).

Mike on Schopenhauer: Part Two

Below is the second part of Mike Wiest's review of The World as Will and Representation, Volume One. The first part is here. The next post will have his concluding thoughts. - Steve


Book 3—The Representation independent of the principle of sufficient reason: the Platonic Idea: the object of art:

On page 169 Book 3 (of Volume 1) starts:

“In the first book the world was shown to be mere representation, object for a subject. In the second book, we considered it from its other side, and found that this is will, which proved to be simply what this world is besides being representation. In accordance with this knowledge, we called the world as representation, both as a whole and in its parts, the objectivity of the will, which accordingly means the world become object, i.e., representation. Now we recall further that such objectification of the will had many but definite grades, at which, with gradually increasing distinctness and completeness, the inner nature of the will appeared in the representation, in other words, presented itself as object. In these grades we recognized the Platonic Ideas once more… In all these forms we recognize only the different aspects of the principle of sufficient reason that is the ultimate principle of all finiteness, of all individuation, and the universal form of the representation as it comes to the knowledge of the individual as such. On the other hand, the Idea does not enter into that principle; hence neither plurality nor change belongs to it. While the individuals in which it expresses itself are innumerable and are incessantly coming into existence and passing away, it remains unchanged as one and the same, and the principle of sufficient reason has no meaning for it. But now, as this principle is the form under which all knowledge of the subject comes, in so far as the subject knows as an individual, the Ideas will also lie quite outside the sphere of its knowledge as such. Therefore, if the Ideas are to become object of knowledge, this can happen only by abolishing individuality in the knowing subject. The more definite and detailed explanation of this is what will now first concern us.”

The distinct grades of objectification of the will are Plato’s Ideas, the “timeless prototypes of natural things.” Because all things are phenomena of one will, they are in some degree of relationship and harmony with one another; however, because the will is blind, the Ideas are in tension with one another, vying to manifest in phenomena. The complex balance of harmony and conflict produce phenomena in spacetime, causally ordered.

[S mentions that Platonism gets ridiculed, and it seems to be fairly unfashionable nowadays too, so I thought it might be helpful to mention a modern version of Platonism I came across recently in a paper by John D. Barrow called “Godel and Physics.” Platonism is not the subject of the paper, and is really just a manner of speaking rather than a developed theory. Still, this example made S’s Platonism a lot more digestible to my modern mind. In it, the Platonic Ideas are the symmetry groups that define modern elementary particle physics, and the different particle fields are different “representations” of the Lorentz group. “Representations” here is the actual technical math or physics term for the different “realizations” or “instantiations” of a particular symmetry group structure, so the physics meaning seems somewhat consonant with S’s usage.]

Now, there is a will-less state that reveals the Ideas in direct perception (as opposed to conceptually): the perception of the Ideas is the source of true art. Ideas are “generative,” as opposed to concepts which are abstracted from perception and “exhausted by their definition.”

S gives an interesting theory of aesthetics, the beautiful, the sublime, and art; in which music holds a special place as the direct analogue of the harmony of the different levels of objectification of the will. He develops an analogy between the hierarchy of tones in music with their foundation in the low, slow bass; and the hierarchy of levels of reality. [Here the discussion reminds me of a number of other vibration models of reality and perception, from superstring theory to the Greek Logos to kotodama, the science of spirit-sounds in Japanese Shinto.]

Book 4—The World as Will, Second Aspect: With the attainment of self-knowledge, affirmation and denial of the will-to-live:

Here S treats the ethical aspect of human behavior, the nature and extent of human freedom, and his notion of salvation:

Volume 1, page 272: “The point of view given and the method of treatment announced suggest that in this ethical book no precepts, no doctrine of duty are to be expected; still less will there be set forth a universal moral principle… Generally we shall not speak of “ought” at all, for we speak in this way to children and to peoples still in their infancy, but not to those who have appropriated to themselves all the culture of a mature age. It is indeed a palpable contradiction to call the will free and yet to prescribe for it laws by which it is to will. “Ought to will!” wooden-iron! But in the light of our whole view, the will is not only free, but even almighty; from it comes not only its action, but also its world; and as the will is, so does its action appear, so does its world appear; both are its self-knowledge and nothing more. The will determines itself, and therewith its action and this world also;”

So, from an absolute point of view outside of time, the will is free, but the will of any individual in time is determined by causes in time. There is an exception though:

Volume 1, page 287: “Man, however, is the most complete phenomenon of the will, and as was shown in the second book, in order to exist, this phenomenon had to be illuminated by so high a degree of knowledge that even a perfectly adequate repetition of the inner nature of the world under the form of the representation became possible in it… At the end of our whole discussion it will also be seen that, through the same knowledge, an elimination and self-denial of the will in its most perfect phenomenon is possible, by the will’s relating such knowledge to itself… In just this way, it exhibits the phenomena of holiness and self-denial… In this sense not only the will itself, but even man can certainly be called free, and can thus be distinguished from all other beings.”

From the point of view of causality, a person’s character is his fixed individual nature that determines the moral quality of his actions. In that context all our actions are fully determined by the intersection of our character with various circumstances (including the changing circumstance of our own growing knowledge about our own individual character as revealed by our actions). The above-mentioned freedom seems to manifest itself as a suppression of a human’s character, rather than an actual change of character, so that a sort of universal self-less personality emerges (p.403).

Page 404: “Now since, as we have seen, that self-suppression of the will comes from knowledge, but all knowledge and insight as such are independent of free choice, that denial of willing, that…only direct expression of the freedom of the will…is not to be forcibly arrived at by intention or design, but comes from the innermost relation of knowing and willing in man; hence it comes suddenly, as if flying in from without.”

[He approvingly quotes Christian descriptions of this phenomenon as the “catholic, transcendental change,” a “new birth” resulting from “grace” rather than natural causality. On page 405 he summarizes the extent of his agreement with Christian theology: “The doctrine of original sin (affirmation of the will) and of salvation (denial of the will) is really the great truth which constitutes the kernel of Christianity, while the rest is in the main only clothing and covering, or something accessory.”]

I’m generally pretty skeptical of “compatibalist” views of the relation between determinism and free will, but in S’s theory it does seem conceivable that the will that is the impetus for everything that is, when it realizes—i.e. creates—what it has willed, might wish to suppress itself, or at least its individualistic ego-centered physical-biological aspects. (Especially since it realizes all existence is “suffering,” fear and never-satisfied cravings, the dukkha of the First Noble Truth of Buddhism.) The will as thing-in-itself wills whatever it wants, freely, so when it realizes what it is—in a human brain, it may “change its mind.” The physical body may behave differently than it otherwise would have, but we might say the physical laws (for S these include causes, stimuli, and motives—all deterministic) are not changed or violated….It’s just that certain factors or forces have been reduced in amplitude, are not as strenuously fought for, but this change has no motive. Ultimately I can’t call this a deterministic theory, but it provides a scheme in which human behavior can transcend physical laws without directly violating them.

Here I’ve emphasized S’s treatment of freedom and determinism, but he also develops an interesting ethical theory. I find it to be a pretty intuitive model for moral realism. Though S says his philosophy won’t tell us how to behave, he explains that our actions nevertheless carry a real moral significance. Here is how he introduces the concept of “wrong”:

P334 “Now since the will manifests that self-affirmation of one’s own body in innumerable individuals besides one another, in one individual, by virtue of the egoism peculiar to all, it very easily goes beyond this affirmation to the denial of the same will appearing in another individual. The will of the first breaks through the boundary of another’s affirmation of will, since the individual either destroys or injures this other body itself, or compels the powers of that other body to serve his will, instead of serving the will that appears in that other body… This breaking through the boundary of another’s affirmation of will has at all times been distinctly recognized, and its concept has been denoted by the word wrong (Unrecht). For both parties instantly recognize the fact, not indeed as we do here in distinct abstraction, but as feeling.”

The feelings S is referring to are a “mental pain” of injustice in the victim and the “feeling of wrong committed” in the perpetrator. He develops this principle in a variety of cases, and distinguishes this negative ethical principle from the positive virtues that flow from the will-less consciousness. He discusses various approaches to the will-less state, and explains the distinction between the denial of the will arrived at by a clear objective perception from the apparent denial of the “will-to-live” in suicide. I won’t dwell on his ethical theory because I don’t feel competent to compare it to other approaches and attempt an overall assessment. But again, it seems to offer an intuitive metaphysics for a kind of moral realism—but with a more qualified freedom than one might expect from a moral realist theory.

(S’s final chapter of Volume 1 is an appendix on Kant, sketching K’s principal merits—which S earnestly considers to be epoch-making, as well as detailing his errors. I think Volume 2 is essentially further elaboration of the theory presented in Volume 1, and responses to objections composed over 30 years between the publication of Vols. 1 and 2.)

Guest Post: Mike's Review of Schopenhauer

I am happy to introduce a guest post below, authored by Mike Wiest. In a discussion in the comment thread of an earlier post (“Pan-Intentionality”), Mike mentioned his recent reading of Arthur Schopenhauer’s work, and talked about connections he saw between Schopenhauer and the topics that he, Justin and I were talking about. Below is the first of a series of three posts containing Mike’s summary review and reactions to Volume One of The World as Will and Representation. I’d also like to note that Justin, in a similar spirit, also brought up Nietzsche in the discussion, and he followed up with a post on the metaphysics of Nietzsche’s concept of the Will to Power at his blog, Panexperientialism. Here's Mike--

The World as Will and Representation, Volume 1

Schopenhauer claims at the outset that his entire book was aimed at and necessary to communicating a single thought. He states further that because of the organic inter-relationship among the aspects of that single thought, his book must be read twice to be fully comprehended (as, he says, with a great musical composition). I only read it once, but I think the thought is something like this: We can know Kant’s unknowable thing-in-itself, the true nature of the world, by direct conscious perception; and what this experience discloses is that all of our individual wills and consciousnesses are “phenomena” of a single, unconscious, universal will outside of time.

Book 1—Representation:

The beginning of philosophy for S is to realize that this world of objects is our representation, and furthermore that all objects are for a subject: all objects are subject-objects. He thinks that only Kant’s teaching can effectively produce the insight that removes the “child-like realism in which we are all born.” And thus “My philosophy starts from Kant’s, and therefore presupposes a thorough knowledge of it.” In particular, Kant taught us the distinction between our experience of an object, the phenomenon, and its true inner nature or reality, the thing-in-itself. (Despite this statement I think one could read and enjoy S without having read Kant: S’s Kant is easier to understand than Kant in his own words.)

But Kant missed that the a priori framework for all experience (including time, space, and matter understood as the principle of causality) are all manifestations of one principle of sufficient reason, which says every event has a cause and implies universal determinism (—but this is not S’s last word on freedom!). This causal law and determinism apply to all objective phenomena, meaning that every event in spacetime has a cause in spacetime, which is the reason the event happened then and there. But because causes and effects in spacetime constitute the form of our subjective understanding of objects (they are prerequisites for being an object), objective phenomena are all for-a-subject. It may not be so difficult for a panpsychist to accept that all matter has a subjective aspect; the hard part is accepting that we cannot think of the thing-in-itself as matter (event protoconscious matter) evolving in spacetime. Again, the matter model is perfectly effective empirically, for describing the network of objects and causes, but we have no inkling of the thing-in-itself behind our representations (this will change later in the book). Thus, our causal reasoning cannot be used to explain the origin or form of the fundamental forces, nor anything outside the causal network. Similarly, there can be no question of a causal relationship between subject and object, in either direction. Rather, subject and object are necessary poles of all objective existence in spacetime.

Now, S thinks that Kant and many other philosophers have been confused about perception and its relation to concepts and rational thought. For S perception is already intellectual (or cognitive). In particular, perception is immediate causal understanding (an intuition based on normal context, called illusion when wrong). For example, rather than merely sensing a two dimensional pattern of colors, I perceive “(this sensation in my visual field is caused by) an object nearby in 3D space in front of me.” This faculty we have in common with animals. Reason is a basically uniquely human faculty that uses concepts abstracted from perception to reach conclusions about past and future events (called error when wrong). This ability liberates us from the present. S has a nice pictorial way of representing reasoning (using Venn diagrams) as a procedure of passing between different concepts by means of what they have in common. He claims this simple framework can account for all our reasoning. Kant’s error in this context is roughly that he takes concepts to be primary and perceptions are to be understood in terms of concepts, whereas S teaches that all original evidence lies in perception, and concepts merely systematize, fix, and communicate evidence from perception.

[I’m not sure yet how I feel about the relational interpretation of quantum mechanics. But from this line in the Stanford Encyclopedia article about it, it seems to be a specific instantiation of S’s doctrine that objects and their various properties exist only relative to a particular observer: “Quantum mechanical relationalism is the observation that there are no absolute properties: properties of a system S are relative to another system O with which S is interacting.”]

Book 2—Will:

It’s what Kant missed when he said the thing-in-itself is absolutely unknowable. Considering things objectively, from the outside, we can never fathom their inner nature. But S points out that there is one thing whose inner nature we have special access to. S says that in reflecting on the contents of our own consciousness we find something absolutely distinct from all the objects in our representation (i.e. even subject-objects), namely feelings that reflect our will.

Volume 2 page 202: “…Not only willing and deciding in the narrowest sense, but also all striving, wishing, shunning, hoping, fearing, loving, hating, in short all that directly constitutes our own weal and woe, desire and disinclination, is obviously only affection of the will, is a stirring, a modification, of willing and not-willing, is just that which, when it operates outwards, exhibits itself as an act of will proper.”

Our will is often unconscious, but in experience it manifests pleasurable and painful states where our preferences are apparent, like anger and lust. Of course the various passions are usually experienced as entangled with our representations of our body and other bodies in spacetime, but for S the road to truth is to clarify the distinction between them. The point is to realize that our will is our deepest reality, our innermost essence (not our intellect, which serves the will, and is in fact “objectified” will). The next—big—step is to see that my inner nature, my true existence, is identical with the thing-in-itself of the whole world.

So we are to understand that the apple’s falling and the seedling’s sprouting are impelled by the same will (though unconscious) that ultimately drives us. This world is the objectification, or mirror, of will. We cannot consider it as multiple because space is the principle of individuation, which exists only in our representation. It is outside of all causation, but the world of causes in beginningless time arises out of it. Grades or levels of objectification of will correspond to inexplicable laws or entities that must be presupposed in our causal explanations. For example, physical causes, stimuli, and motives all necessarily bring about particular effects in particular circumstance, but represent different levels of objectification of will. Physical causes lead to an effect that is of the same physical magnitude as the cause, whereas stimuli are small causes that lead to large effects, and motives are causes that have passed through knowledge, i.e. through a conscious brain process. [To me this is account of the objective world as a shell whose inner being is mental in nature is reminiscent of Gregg Rosenberg’s contemporary account, in which causality is carried by experiences corresponding to a hierarchy of natural individuals, and the temporally ordered flow of events arises from some kind of meta-temporal nexus of events.]

The thing in itself, the universal will outside of time, is unconscious and purposeless, a blind “procreant urge of the world” (that’s Whitman, not S). But we can also say that it wills to live:

Volume 1, page 274: ‘The will, considered purely in itself, is devoid of knowledge, and is only a blind, irresistible urge, as we see it appear in inorganic and vegetable nature and in their laws, and also in the vegetative part of our own life. Through the addition of the world as representation, developed for its service, the will obtains knowledge of its own willing and what it wills, namely that this is nothing but this world, life, precisely as it exists. We have therefore called the phenomenal world the mirror, the objectivity, of the will; and as what the will wills is always life, just because this is nothing but the presentation of that willing for the representation, it is immaterial and a mere pleonasm if, instead of simply saying “the will,” we say “the will-to-live.” ‘

We are the highest level of reflection (i.e. objectification) of the will.

Panpsychism in the NY Times Magazine

Discussed in a short essay by writer Jim Holt. Overall, a nice advertisement for the idea, with mentions of Nagel, Chalmers, and Galen Strawson. If only he could have resisted the urge to use the "thinking rock" trope!

Dreyer's Internal Relativity

In recent years, a new school of quantum gravity research has come into view. The research programs in this group attempt to demonstrate that neither the matter fields nor the space-time geometry described by our present theories are fundamental, but instead both co-emerge from a pre-geometric quantum mechanical foundation. (Links to my prior posts on this research are at the end of this post). Olaf Dreyer is a theoretician working in this mode. He recently presented this paper, “Why Things Fall”, which nicely summarized his work to-date (hat tip: this thread maintained by marcus at Physics Forums).

What helps make the paper accessible is that Dreyer’s approach has been to work at a very stylized conceptual level. He wants to show how the path to a full theory should go, with the goal of filling in crucial details later. It is clear that this kind of theory has a long way to go, in particular to show that Einstein’s equations will specifically emerge.

In the introduction, Dreyer describes the approach where gravity is not assumed at the outset but is emergent. He breaks this down further by discussing the constraint that there is to be is no clean distinction between the emergent gravity and matter degrees of freedom (as opposed to an approach like early string theory where the graviton emerged as part of the particle family). Rather, it is only through the matter degrees of freedom that we infer the geometry. He says: “…we are taking seriously the fact that we only know geometry through matter…geometry alone is not accessible to us. (p.2)” This description of the emergence of geometry is in contrast to an approach like loop quantum gravity, where the space-time geometry of general relativity is taken as given and then quantized. What makes the theory a quantum theory of gravity is that the matter degrees of freedom and inferred geometry will emerge from a foundation which is quantum mechanical. One consequence of adopting a QM system as fundamental is that background time is assumed at this foundational level, although it will have no relationship to emergent space-time. I have no problem with this: something has to be fundamental and I think time and asymmetric causality are good candidates for this role.

The term “internal relativity” is meant to stress a key point: we ask what geometry obtains from observed degrees of freedom from a point of view within the system. Dreyer believes that if we do this, relativity naturally will emerge.

As a prepatory example, Dreyer shows (in section 3) how something like this happens in a classical theory. Specifically, if we start with an electro-magnetic field (on a Newtonian background of absolute space and time), we can see how special relativity emerges from considering how the dynamics of charged particles gives rise to contraction/dilation effects from a point of view inside the system.

Section 4 presents the main model of the paper. Dreyer begins with a simple quantum mechanical system in a ground state (level 0). Then he allows for excitations (traveling spin waves in the model). This is level 1, and the excitations are meant to be analogues of elementary particles of our world. Level 2 is given by bound states of these excitations. These bound states are meant to be analogues of the solid objects of our world. They do not leave the parameter on ground state of level 0 unchanged. Dreyer analyzes the effect of the objects on the distribution of the level 0 parameter and is able to derive Newton’s law of gravitation between the objects in a low velocity approximation. He then says the presence of Newtonian gravity means that the geometry seen by internal observers will be not flat but curved (a curved Lorentzian manifold). So while Newtonian gravity was derived, the overall framework implies something which goes beyond Newtonian gravity. He notes that the model falls short of showing that the gravitational mass implied for the bound objects is actually the same as the inertial mass.

Section 5 concludes with some discussion. Dreyer reiterates the concepts involved in having matter degrees of freedom and gravitation emerge from a fundamental level that has distinct degrees of freedom. He discusses how certain problems don’t arise in this conceptual framework, such as the “problem of time” which arises when one quantizes space-time, and the problem of incorrect predictions for the value of the cosmological constant. He also discusses some very preliminary ideas for observable consequences which may follow from this kind of theory.

Emergent Quantum Gravity Research Series (in chronological order):

What’s New in Quantum Gravity
A section of Lee Smolin’s recent book discusses new approaches.

Causality First
Rafael Sorkin’s Causal Sets and Fotini Markopoulou’s Quantum Causal Histories.

Emerging From the Noise
More on Markopoulou’s approach.

Caution: Universe under Construction
The Causal Dynamical Triangulation program.

Geometrogenesis
More papers from Markopoulou and colleagues.

In the Beginning was the Qubit
Seth Lloyd’s quantum computing-inspired take on quantum gravity.

Whitehead's Philosophical Theism

I didn’t mention this in my post on panentheism, but prominent among theologians who endorse a form of panentheism are the process theists, such as John Cobb and David Ray Griffin (co-directors of the Center for Process Studies) and their influential predecessor, the late Charles Hartshorne. These theologians take as a starting point the work of Alfred North Whitehead, specifically the speculative metaphysics presented in his late work: Process and Reality, written in 1927-28. Whitehead himself was not a theologian -- originally a mathematician, he was for years a leading logician and philosopher of science. However, at the end of his career, when it came to fashioning his grand system of process philosophy, he did assign a role to God in his scheme. The result, as A.D. Irvine explains in his SEP article on Whitehead, was a skewed legacy: “Thus although not especially influential among contemporary Anglo-American secular philosophers, (Whitehead’s) metaphysical ideas have had significant influence among many theologians and philosophers of religion.”

I find the way things fell out here interesting. On the one hand, Whitehead’s work was eagerly received by religious thinkers who wished to fashion a theology which improved on classical theism. On the other hand, secular philosophers mostly ignored his work, a response not especially surprising given the prevailing 20th century attitudes toward metaphysics in general. But neither group’s perspective seems to do justice to Whitehead’s own situation: a non-theologian who found that following through on the development of an innovative philosophy led to the inclusion of God in the system.

The late Victor Lowe, who wrote a biography on Whitehead, wrote here about what he learned about Whitehead’s attitude toward God and religion. According to Lowe, Whitehead (1861-1947) started his life as a believer, but became an outspoken agnostic, and remained so through much of his philosophical career. Lowe cites the reports of family members, however, that later he may have begun to turn back toward theism, possibly in reaction to the tragic events of World War I, including the death of his younger son. Lowe also cites evidence, though, of an ongoing ambivalence toward God throughout the rest of his life. In any case, however, given the paucity of evidence about Whitehead’s thinking outside his published work (he left no pertinent letters, diaries, etc.), the hard evidence for a turn toward theism must be derived from his late metaphysical writings. As discussed below, the “theism” found there comes in a purely philosophical context, not from any appeals to experience or authority. And it remained pretty clear from this work that Whitehead, as Donald Viney puts it here, “had little truck with organized religion.(p.7)” (please note Viney also wrote the comprehensive SEP entry on Process Theism.)

Looking at Whitehead’s own words in P&R (Part V, Ch. II, Section I), he dismisses the traditional concepts of God as imperial ruler, personification of morality, or unmoved mover. He says “Hume’s Dialogues criticize unanswerably these modes of explaining the system of the world (p.343).” Whitehead wants to dispassionately analyze what his metaphysics requires God’s nature to be. He also says: “There is nothing here in the nature of proof.” His says his efforts can be thought as “an attempt to add another speaker” to the Dialogues (p.343).

The scheme in P&R (to be brutally brief and imprecise) involves re-describing the world in terms of a new elementary constituent -- an extended event or process -- called an actual occasion. Each actual occasion begins with a subjective perception (a “prehension”) of prior or adjacent events, and then proceeds to a completion of the process via a creative or spontaneous choice among available possibilities. The completed occasion then becomes the objective input for new occasions. The ontology of actual occasions offered a novel way for making sense of how mind fits into a thoroughly experiential world and how a theory of “real” causation might work. God serves three roles in the system. First, God is the principle of creativity which participates in all events. Second, his “primordial nature” provides a ground for eternal objects – the abstract entities which serve as examples or goals for events. Finally, his “consequent nature” is as a home in which completed events reside. Later in the chapter quoted from above, Whitehead discusses these attributes and makes some comparisons of this description with other conceptions of God.

Now I’m no expert, and it has been a few years since I struggled through all of P&R. But it seems that for the actual occasions of the world to do their job, they need the presence and the participation of God. God is the entity in the system which provides the creative impulse, the template for choices, and the ground for completed events.

Others disagree: Donald W. Sherburne, the Whitehead scholar who wrote a helpful companion volume to P&R, argued against the need for the roles played by God and he worked on a project to “naturalize” Whitehead. This is something I want to look at further. But even if the roles played by God are required, the decision to name the system’s transcendent entity “God” appears to me to be a choice rather than a requirement, given how distinct this entity is from the God of tradition.

I have a high regard for Whitehead’s process philosophy; it seems every time I look at his work (although it is very difficult reading) I find that many of the philosophical ideas discussed on this blog are present or suggested there. Perhaps then, I should just respect his decision to include God in his work and not try to quibble with this. But my main point in discussing the issue is to stress my view that secular “analytic” philosophy has a lot to learn from Whitehead’s metaphysics. And I would hope more can engage with his philosophy without letting God “get in the way”.

Panentheism

The best candidate for the “role” of God I’ve found through philosophy is that of the full expanse of metaphysical possibilities present in a theory of modal realism (this idea was previously broached in this post). If the familiar actual world is a subset of a necessarily existing modal manifold, then the theological version of this framework would be a form of panentheism. I thought I’d look into what some theologians are saying about panentheism and recently read most of the articles in a volume edited by Philip Clayton and the late Arthur Peacocke: In Whom We Live and Move and Have Our Being: Panentheistic Reflections on God’s Presence in a Scientific World.

Several of the authors in the volume offer definitions of panentheism; the one from the Oxford Dictionary of the Christian Church seems a good starting point: “The belief that the Being of God includes and penetrates the whole universe, so that every part of it exists in Him, but (as against Pantheism) that His Being is more than, and is not exhausted by, the universe.” (BTW, my post on plain old pantheism is here).

While there are strands of panentheistic thought which extend throughout history, Peacocke’s introductory essay sets out many of the reasons a contemporary theist might move toward panentheism from a starting point of classical theism. He says a variety of factors form the basis of this impetus: “Broadly they all point to the need to accentuate, in light of contemporary knowledge of the world and of humanity, a much stronger sense than in the past of the immanence of God as in some sense “in” the world (p.xix)”.

Importantly, it is the influence of the scientific account of the world as a seamless web of natural phenomena which “…has rendered it increasingly problematic to conceive of God’s action in the world as intervening in any way that involves an abrogation of the very regularities with which God’s own self is regarded, by theists, as having endowed the world (p.xx)”. Further, Peacocke points out that the scientific explication of how natural systems evolve and emerge through self-organization leads toward a reading of God’s work in the world as “…creator ‘in, with, and under’ the creative, natural processes of the world unveiled by the sciences (p.xx)”.

Another important driver is the increased implausibility of a strong mind/body dualism, given advances in cognitive science and neuroscience. This “…has inevitably reflected upon the use of traditional models of God’s relation to the world in terms of personal agency. In these models God’s actions on the world was analogous to a person’s intentions being implemented by bodily actions…much traditional theology has implicitly been based on dualistic models (p.xxi).” Again, a view of God’s action being continuously present through natural processes seems more plausible.

Still, as against pantheism, a panentheistic model also preserves the transcendence of God, preserving a distinction between God and world. Thus for most of the contributors to this volume, coming from a theistic background, panentheism offers the possibility of a middle ground.

But, what if you are approaching things from a non-theistic perspective? If our world is a subset of a larger metaphysical entity, what’s the motivation for taking a theistic perspective on this entity at all, apart from the aspect of transcendence?

Well, there are a couple of other aspects of the philosophical model I’ve been working on that might support this perspective. First, reality is inherently experiential. Our world is comprised of events which are physical when viewed from the third-person perspective, but experiential from the first-person view. Possible events which are unactualized from our local point of view are experienced from a distant point of view: the full manifold of events, we might imagine, is being experienced across the full sum of points of view. Further, I have argued that our causal contact with the larger space of possibilities may provide the grounding for our rational faculties, including our knowledge of abstract objects. Rationality is based on knowledge of logical possibilities, which is founded on our contact with real metaphysical possibilities. According to the thesis of modal rationalism, metaphysical and logical possibilities are the same. Thus, rationality maps the terrain of modal space, or alternatively, is a reflection of the “shape” of God.

On the other hand, in this conception, it still seems problematic to me that the manifold of possibilities is a “person”, even if it encompasses experience and grounds reason. In the absence of personhood, is it still God? Also, while I can summon up feelings of awe and wonder with regard to this entity, I can’t see why one would worship it. I suppose it is possible that whether or not you take a theistic or religious stance toward this entity might be a question of personal preference or psychological makeup, but I’m not sure (I ran up against this issue in an old two-part post called “The God Option”).

In any case, it’s interesting that the course of philosophical reasoning can at least move one into this terrain. It gives me some hope that a worldview which has independent motivation could also serve as a potential meeting ground for those looking to improve on both classical theism and classical materialism.