Almost-live report: Daniel Dennett at the Cambridge Darwin-and-faith bash

July 9, 2009 • 5:28 am

Daniel Dennett is attending the Darwin celebration at Cambridge University, and sent us this report from the two symposia on faith and religion — symposia that were, as I reported earlier, sponsored by The John Templeton Foundation.  On to Dan’s report, which he kindly gave permission to post:

PART 1.

I am attending and participating in the big Cambridge University Darwin Week bash, and I noticed that one of the two concurrent sessions the first day was on evolution and theology, and was ‘supported by the Templeton Foundation’ (though the list of Festival Donors and Sponsors does not include any mention of Templeton). I dragged myself away from a promising session on speciation, and attended. Good thing I did. It was wonderfully awful. We heard about the Big Questions, a phrase used often, and it was opined that the new atheists naively endorse the proposition that “There are no meaningful questions that science cannot answer.” Richard Dawkins’ wonderful sentence about how nasty the God of the  Old Testament is was read with relish by Philip Clayton, Professor at Claremont School of Theology in California, and the point apparently was to illustrate just how philistine these atheists were—though I noticed that he didn’t say he disagreed with Richard’s evaluation of Yahweh. We were left to surmise, I guess, that it was tacky of Richard to draw attention to these embarrassing blemishes in an otherwise august tradition worthy of tremendous respect.  The larger point was the complaint that the atheists have a “dismissive attitude toward the Big Questions” and Dawkins, in particular, didn’t consult theologians. (H. Allen Orr, they were singing your song.) Clayton astonished me by listing God’s attributes: according to his handsomely naturalistic theology, God is not omnipotent,  not even supernatural, and . . . . in short Clayton is an atheist who won’t admit it.

The second talk was by J. Wentzel van Huyssteen, a Professor of  Theology at Princeton Theological Seminary, and it was an instance of  “theological anthropology,” full of earnest gobbledygook about embodied minds and larded with evolutionary tidbits drawn from Frans de Waal, Steven Mithen and others.  In the discussion period I couldn’t stand it any more and challenged the speakers: “I’m Dan Dennett, one of the Four Horsemen of the Apocalypse, and we are forever being told that we should do our homework and consult with the best theologians. I’ve heard two of you talk now, and you keep saying this is an interdisciplinary effort—evolutionary theology—but I am still waiting to be told what theology has to contribute to the effort. You’ve clearly adjusted your theology considerably in the wake of Darwin, which I applaud, but what traffic, if any, goes in the other direction? Is there something I’m missing? What questions does theology ask or answer that aren’t already being dealt with by science or secular philosophy? What can you clarify for this interdisciplinary project?” (Words to that effect)  Neither speaker had anything to offer, but van Huyssteen  blathered on for a bit without, however,  offering any instances of theological wisdom that every scientist interested in the Big Questions should have in his kit.

But I learned a new word: “kenotic” as in kenotic theology. It comes from the Greek word kenosis meaning ‘self-emptying.’ Honest to God. This new kenotic theology is all the rage in some quarters, one gathers, and it is “more deeply Christian for being more adapted to Darwinism.” (I’m not making this up.) I said that I was glad to learn this new word and had to say that I was tempted by the idea that kenotic theology indeed lived up to its name.

At the coffee break, some folks told me my question had redeemed the session for them, but I would guess I irritated others with my persistent request for something of substance to chew on.

After the second set of two talks, which I was obliged to listen to since the moderator promised more responses to my “challenge” and I had to stay around to hear them out, there was another half hour of discussion. I did my duty: I listened attentively, I asked questions, and the theologians were embarrassingly short on answers, though one recommended David Chalmers on panpsychism—a philosopher, not a theologian, and second, nobody, not even Chalmers, takes panpsychism seriously, to the best of my knowledge. Do theologians?

The third speaker was Dr. Denis Alexander of Cambridge University, and he had some interesting historical scholarship on the varying positions on progress and purpose offered by thinkers from Erasmus Darwin–who had surmised that all life began from a single “living filament” (nice guess!)–through Darwin and Spencer and the Huxleys and on to Gould and Dawkins (and me).  Particularly useful was a late quote from Gould’s last book (p468 if you want to run it down) in which he allowed, contrary to his long-held line on contingency, that evolution did exhibit “directional properties” that could not be ignored.  The conclusion of Alexander’s talk was that it is nowadays a little “more plausible that it isn’t necessarily the case that the evolutionary process doesn’t have a larger purpose.”  That is certainly a circumspect and modest conclusion.

The fourth speaker was the Catholic Father Fraser Watt (of Cambridge University School of Divinity, and a big Templeton grantsman, as noted by the chair).  He introduced us to “evolutionary Christology.” Again, I’m not making this up. Evolution, it turns out, was planned by an intelligent God to create a species “capable of receiving the incarnation”—though this particular competence of our species might be, in Watts’ opinion, a “spandrel.” Jesus was “a spiritual mutation, ” and “the culmination of the evolutionary process,” marking a turning point in world history. A member of the audience cheekily asked if Father Watt was saying that Jesus’s parents were both normal human beings then? (I was going to press the point: perhaps Jesus’s madumnal genes from Mary were the product of natural selection but his padumnal genes were hand crafted by the Holy Spirit!—but Father Watt forestalled the inquiry by declaring that he had no knowledge or opinion about Jesus’ parentage—something that his Catholic colleagues will presumably not appreciate.)

Afterwards I was asked if I had enjoyed the session, and learned anything, and I allowed as how I had. I would not have dared use the phrase “evolutionary Christology” for fear of being condemned as a vicious caricaturist of worthy, sophisticated theologians, but now I had heard the term used numerous times, and would be quoting it in the future, as an example of the sort of wisdom that sophisticated theology has to offer to evolutionary biology.
I had an epiphany at the end of the session, but I kept it to myself: The Eucharist is actually a Recapitulation of the Eukaryotic Revolution. When Christians ingest the Body of Christ, without digesting it, but keep it whole (holistier-than-thou whole), they are re-enacting the miracle of endosymbiosis that paved the way for eventual multi-cellularity. And so, dearly beloved brethren, we can see that by keeping Christ intact in our bodies we are keeping His Power intact in our embodied Minds, or Souls, just the way the first Eukaryote was vouchsafed a double blessing of earthly competence that enabled its descendants to join forces in Higher Organizations. Evolutionary theology. . . . I think I get it! I can do it! It truly is intellectual tennis without a net.

There is another Templeton session on The Evolution of Religion, with Pascal Boyer, David Sloan Wilson, Michael Ruse and Harvey Whitehouse. Dr. Fraser Watt, our evolutionary Christologist, will be chairing the session. It will be interesting to see how docile these mammals are in the feeding trough.

PART 2.

The second Templeton-sponsored session (at the Cambridge Darwin Festival) was more presentable.  On the evolution of religion, it featured clear, fact-filled presentations by Pascal Boyer and Harvey Whitehouse, a typical David Sloan Wilson advertisement for his multi-level selection approach, and an even more typical meandering and personal harangue from Michael Ruse.  The session was chaired, urbanely and without any contentful intervention, by Fraser Watt, our evolutionary christologist. (I wonder: should “christology” be capitalized?   Ian McEwan asked me if there was, perhaps, a field of X-ray christology.  I’ve been having fun fantasizing about how that might revolutionize science and open up a path for the Crick and Watson of theology!)

I learned something at the session. Boyer presented a persuasive case that the “packaging” of the stew of separable and largely independent items as “religion” is itself ideology generated by the institutions, a sort of advertising that has the effect of turning religions into “brands” in competition. Whitehouse gave a fascinating short account of the Kivung cargo cult in a remote part of Papua New Guinea that he studied as an anthropologist, living with them for several years.  A problem: the Kivung cult has the curious belief that their gods (departed ancestors) will return, transformed into white men, and bearing high technology and plenty for all.  This does present a challenge for a lone white anthropologist coming to live with them for awhile, camera gear in hand, and wishing to be as unobtrusive as possible.

Wilson offered very interesting data from a new study by his group on a large cohort of American teenagers, half Pentecostals and half Episcopalians (in other words, maximally conservative and maximally liberal), finding that on many different scales of self-assessment, these young people are so different that they would look to a biologist like “different species.”

Ruse declared that while he is an atheist, he wishes that those wanting to explain religion wouldn’t start with the assumption that religious beliefs are false.  He doesn’t seem to appreciate the role of the null hypothesis or the presumption of innocence in trials.  We also learned tidbits about his life and his preference–as an atheist–for the Calvinist God.

Many thanks to Dan for the report, and for permission to make it public.

More failures to find human behavior genes

July 8, 2009 • 7:13 am

Over at the New York Times, science writer Nicholas Wade reports on the difficulties researchers have had in pinpointing genes that promote the appearance of schizophrenia:

The journal Nature held a big press conference in London Wednesday, at the World Conference of Science Journalists, to unveil three large studies of the genetics of schizophrenia. Press releases from five American and European institutions celebrated the findings, one using epithets like “landmark,” “major step forward,” and “real scientific breakthrough.” It was the kind of hoopla you’d expect for an actual scientific advance.

It seems to me the reports represent more of a historic defeat, a Pearl Harbor of schizophrenia research.

The defeat points solely to the daunting nature of the adversary, not to any failing on the part of the researchers, who were using the most advanced tools available. Still, who is helped by dressing up a severely disappointing setback as a “major step forward”?

Well, if you’ve been around a while, you’ll find this depressingly familiar.  Reports of finding gene after gene for things like alcoholism, “novelty seeking,” depression, and homosexuality have been withdrawn or not verified after further research.  There may be many genes affecting the propensity to behave a certain way, or to contract a certain disease, and variants of each gene may contribute only a tiny bit to the trait, making locating these genes a very difficult — or even impossible — task.  And once you find one of them, what can you do?  A gene that, say, increases your chance of getting hypertension by 2% is hardly of much interest medically.

Carl Zimmer discusses the problem on his blog, with a link to his nice essay on this topic in Newsweek.  It’s a hard problem, but even if we can’t do a lot about it now, at least the scientists can refrain from flogging their research with a lot of hype and false promises.

Jesus and Mo on apophatic theology

July 8, 2009 • 6:17 am

Well, it can’t be coincidence: the mysterious artist of Jesus and Mo is clearly reading about the science-versus-religion debates and transforming them into hilarious strips.  His/her latest is about apophatic theology, which is precisely the theology that Karen Armstrong touts in her new book, The Case for God.   Apophatic theology is apparently this:

. . . negative theology is far more than a puzzling emblem of antique theology; it is the foundation of serious reflection about the divine. He understands negative theology as consisting “in a critical negation of all affirmations which one can make about God, followed by an equally critical negation of our negations.” In his words, “without the negative theology our representation of reality loses all depth and becomes abstract, flat, and unreal.” This happens because we lose sight of the divine whenever we accept as final or complete any conceptual representation of it.

o.k., this is clearly a theology which is practiced by beefy, well-fed liberal theologians rather than the average believer.  It appears to be summed up by the statement,  “We can’t conceive of God until we stop thinking about him.”

Whenever I read stuff like this, it reminds me of George Orwell’s great statement in Notes on Nationalism:

One has to belong to the intelligentsia to believe things like that: no ordinary man could be such a fool.

When are intellectual theologians going to realize that “religion” as practiced by most people does not consist of their oh-so-genteel musings? It’s fine for theologians to indulge in these lucubrations if they want, but not to pretend that science and faith are compatible because everybody practices the theologians’ own liberal form of faith — a faith that sometimes verges on agnosticism.

Oh, wait, maybe I should like this kind of theology because it tells believers to SHUT UP.

Enough ranting; on to Jesus ‘n’ Mo:

2009-07-07

The case for Dog

July 7, 2009 • 1:27 pm

Karen Armstrong has just published a book, The Case for God, which appears to be a kind of oatmeal-y, warm and fuzzy New Theology argument for God, or at least the kind of nebulous and transcendent Ground of Being who passes for God among university theologians.  (Sample: “We need to think of God not as a being, but as Being.”)  Naturally the book is much beloved by accommodationists, and has received some favorable reviews (e.g., here), inevitably accompanied by criticisms of those icky and strident New Atheists who keep trying to take our Ground of Being away from us.

I haven’t yet read this tome, but wanted to highlight a really nice satire in the Guardian by John Crace, a mock summary of what seems to be Armstrong’s arguments and, by extension, many of the New Militant Theologians’ arguments. A sample of Crace:

Things came right with Darwin. Many assume he was an atheist; in reality he was an agnostic who, despite being a lot cleverer than Dawkins, could not refute the possibility of a God. Therefore God must exist, or we drift into the terrible nihilism of Sartre where we realise everything is pointless. Especially this book.

The modern drift to atheism has been balanced by an equally lamentable rise in fundamentalism. Both beliefs are compromised and misconceived. The only logical position is apophatic relativism, as stated in the Jeff Beck (1887- ) lyric, “You’re everywhere and nowhere, Baby. That’s where you’re at.”

I haven’t had time to deal with the tricky issues of the after-life that some who believe in God seem to think are fairly important.

But silence is often the best policy – geddit, Hitchens? And the lesson of my historical overview is that the only tenable religious belief is one where you have the humility to constantly change your mind in the face of overwhelming evidence to the contrary.

God is the desire beyond this desire, who exists because I say so, and the negation of whose existence confirms his transcendence. Or something like that.

And if you believe this, you’ll believe anything.

Robert Hinde refuses to speak at Templeton-sponsored event

July 7, 2009 • 8:02 am

Well, I’m no longer alone in having refused to speak at an event sponsored by the insidious John Templeton Foundation.  Several of us got a report from Richard Dawkins this morning, who is at the Darwin bicentenary celebration at Cambridge University:

Robert Hinde is the elder statesman of the science of Ethology and one one of the most respected figures in British biology. I just met him at the big Cambridge Darwin Festival. Robert had agreed to speak in one of the sessions on ‘Religion and Science’ but withdrew on learning that it was sponsored by the Templeton Foundation. He is now even more respected among British biologists.

Hinde is indeed a famous guy, author of several well respected books on animal behavior, and well known to me as the guy who, with J. Fisher,  first described how British tits learned to open milk bottles, and how that behavior spread through learning.

Yes, those religion symposia (there were two, one for scientists, the other for theology types) sounded a bit fishy to me, peopled as they were with accommodationists. You can bet your bippy that while there were several talks adumbrating compatibility between Darwinism and faith, there were none saying the opposite.  Thanks, Templeton — you’ve done it again.
The curious thing, as P. Z. Myers reports on Pharyngula, is that while the sponsorship of this symposium by Templeton was well known, it wasn’t advertised on the Cambridge University conference site.  Is this “stealth sponsorship”? Does Templeton have something to be ashamed of?

The water chevrotain: almost like a whale

July 7, 2009 • 7:48 am

In Darwin’s time, the fossil record was far spottier than it is now, and no transitional forms were known. (Darwin does mention the transitional “bird” Archaeopteryx in a later edition of The Origin, but didn’t realize its significance.)  Thus, the evolutionary origin of new “types” of animals and plants was largely a matter of guesswork.

Speculating in The Origin on the evolution of whales, for example, Darwin said this about their possible ancestors: “In North America, the black bear was seen by Hearne swimming for hours with widely open mouth, thus catching, almost like a whale, insects in the water.” Well, Darwin took a lot of flak for this, as the image of a whale evolving from a swimming bear seemed, to many, ludicrous.  Well, the real situation may sound just as ludicrous, but has the merit of being supported by evidence.  Whales evolved from artiodactyls (even-toed animals like deer), in particular small artiodactyls like the recently described Indohyus.  The whole scenario is described in my book, and I won’t recount it here.

indohyus-11

Reconstruction of Indohyus by Carl Buell

Indohyus, like some other early artiodactyls, has several features demonstrating an artiodactyl ancestry for the earliest whales.  But now we can see a living form that may be very like Indohyus in size, form, and behavior. This is the water chevrotain. The BBC reports today on a new paper in the journal Mammalian Biology that describes swimming behavior in several species of  water chevrotain (Moschiola spp.).  It is this type of aquatic behavior that could have prompted the transition from dry land to water, as natural selection took a terrestrial animal and made it more and more adapted to aquatic habitats.

If you’ve read WEIT, you’ll know that the chevotain is a small deerlike mammal, with species in both Asia and Africa, that is also called the “mouse deer.”

photo

Water chevrotain (photo by Nick Gordon from ARKive). Cute, no?

The authors observed chevrotains in Borneo.

The modern African species, which is considered evolutionary the most primitive of the Tragulidae (Webb and Taylor 1980), is a species of swamp and riparian habitats. When alarmed they are reported to rush for the nearest river and submerge, swimming upstream and coming to the surface beneath banks or overhanging vegetation (Kingdon 1989). The Asian species, however, are considered dry land animals, and no aquatic behaviour has been recorded (Lekagul and McNeely 1977; Phillips 1980; Payne et al. 1985; de Silva Wijeyeratne, 2008a de Silva Wijeyeratne, G., 2008a. A Photographic Guide to Mammals of Sri Lanka. New Holland, London, UK.de Silva Wijeyeratne 2008a). Two recent observations show that at least some of the Asian species of mouse-deer have retained aquatic behaviour, specifically for predator avoidance. We briefly describe these reports, and discuss the possible implications of our finding for understanding the early evolution of mouse-deer and other ungulates.

Aquatic escape behaviour was observed in June 2008 during a biodiversity survey in northern Central Kalimantan Province, Indonesian Borneo. Whilst surveying, the observers, which included the author U, noticed a mouse-deer, which author EM later identified from photographs as greater mouse-deer Tragulus napu, swimming in a forest stream. When the animal noticed the observers it submerged. Over a period of ca. 60 min, the animal came to the surface at least 4 or 5 times, possibly more often. The observers reported that the animal would remain submerged for more than 5 min at the time. Eventually, the animal was caught by hand, without resisting, identified as a pregnant female and subsequently released (Fig. 1).

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Tragulus napu caught in a river after having spent 60 min hiding underwater.  (Figure 1 from the original paper)

Aquatic escape behaviour was also recently seen in the mountain mouse-deer (Moschiola spp.) (Groves and Meijaard 2005) of Sri Lanka (de Silva Wijeyeratne 2008b). Three observers, including author DSW, saw a mountain mouse-deer running into a pond and starting to swim. They noticed it was being pursued by a brown mongoose (Herpestes fuscus). The mongoose did not enter the water but at times approached within 2 m of the mouse-deer which responded by flaring its throat and showing the white on its throat. The mountain mouse-deer swam with only the upper half of its head out of the water (Fig. 2), and was completely submerged at times. After 15 min the mongoose left, and the mouse-deer came out of the water, but returned soon with the mongoose in pursuit and once again dived into the pond. Later the mouse-deer was caught. It offered no resistance, and was in an exhausted state. Investigation revealed that similar to the Bornean specimen this was also a pregnant female (de Silva Wijeyeratne, 2008b de Silva Wijeyeratne, G., 2008b. Mountain Mouse-deer photographed in Horton Plains National Park. Sri Lanka Wildlife Newsletter, December 2007–February 2008. left angle brackethttp://www.jetwingeco.com/index.cfm?section=page&id=1037right-pointing angle bracket.de Silva Wijeyeratne 2008b).

Clearly this animal can stay underwater for many minutes at a time.  And avoidance of predators by jumping into the water and remaining submerged is obviously something that natural selection could favor.  Ergo, hippos, and maybe whales eventually.  The authors also draw a connection to Indohyus, and speculate that this sort of aquatic escape behavior could have been ancestral in the Tragulidae, the family that embraces all nine species of chevrotain.

Our finding confirms that the aquatic escape behaviour is shared between three tragulid species which may have been evolutionary separated for over 35 million years (Hernández Fernández and Vrba 2005). This makes it likely that aquatic escape is a symplesiomorphic trait to all tragulids, suggesting that it could be ancestral to all Tragulidae. The evolutionary position of the Tragulidae as a very early diverged group within the Ruminantia raises the hypothesis whether aquatic habits, including aquatic escape is an ancient behavioural trait of all early ruminants. Although largely speculative, this idea may be supported by the recent discovery of a 48 million year old mouse-deer-like species, Indohyus, which is presumed to be a missing link between whales and ungulates (Thewissen et al. 2007). Based on its morphology, this species, which belongs to the extinct Raoellidae, is thought to have spent much time in and under water. Raoellids, which are included in the Ruminantia, are hypothesized to be the sister group to cetaceans (whales, dolphins and porpoises) (Thewissen et al. 2007).

What is nice about all this is the confluence of behavior, morphology, and the fossil record in providing not only the correct ancestry of modern whales, but also a rare result: a demonstration in real time of how an adaptive transition might have been made.

Here’s a video from YouTube (also mentioned in WEIT) showing the chevrotain’s swimming behavior. I don’t know if the eagle part is real; seems too fortuitious to me.

_______________

Aquatic escape behaviour in mouse-deer provides insight into tragulid evolution
Erik Meijaard, Umilaela, and Gerhan de Silva Wijeyatne. Mammlian Biology, in press.

A fish with humanoid teeth

July 6, 2009 • 2:52 pm

Courtesy of National Geographic, here is a photo of the pacu (Piaractus brachypomus), an Amazonian fish with a set of remarkably human-like choppers. It’s no surprise that they are herbivorous — eating mainly seeds — and that they can inflict a nasty bite.  They’re related to piranhas.


15 Pacu teeth 3.jpgPhoto from National Geographic website

The world’s only poisonous primate

July 6, 2009 • 7:28 am

From the live-and-learn department, as discussed in today’s Guardian: the world has several venomous mammals (including shrews and the platypus), but there’s only one venomous primate. It’s the slow loris, which comprises three species (all from south or southeast Asia) in the genus Nycticebus.

Here’s a description of the situation from Dr. Brian Grieg Fry, who works on these creatures.

Unlike most primates, the lorises do not leap through trees. Rather they carefully and methodically move their feet in an almost chameleon-like manner, an impression greatly enhanced by thumbs that are more opposing than other primates. Specialised blood vessels allow them to grip on for hours. (This seems especially true when I’m trying to get some work done and Elvie will not let go of my hand and let me type!) When disturbed, (like trying to press return on my keyboard) lorises make a very unique low buzzing sound, much as if they were trying to play the digeridoo but without a didge or using their lips! True talent. In addition to this, when Lorises feel that battle stations is necessary, they fold their arms into a diamond around their head. While this looks incredible cute and useless as a defence mechanism, it allows for them to quickly take the toxin from their fore arms into their mouth in preparation for biting. This is reminiscent of karate moves at the last draw corral. Ah, I see you know the grasshopper, but do you know the Slow Loris?!

Having worked extensively with the lorises for the last couple years I am absolutely smitten with them. However, while they have the face of those cute and cuddly gremlins, they have the attitude of the evil, after-midnight flipside. With disproportionately huge and sharp canine teeth (very fang-like) and powerful jaw muscles their bites alone can be absolutely agonising. However, the pain is compounded by factors beyond the simple tissue trauma caused by the mechanical damage from the powerful jaws. The lorises are actually toxic! On the inside of their elbows, sebaceous tissue secretes a toxin (like sweat pores, which is rather fitting since the toxic mixture smells remarkably like sweaty socks). The lorises take it into their mouth and deliver it in the bite. It is not the upper and lower jaw vampire like canine teeth that deliver this toxin. It is the innocuously small teeth in the front of the lower jaw which slope forward and help conduct the saliva into the wound. One time I was working with the large lorises in the research collection and a visiting vet student from Belgium saw me putting on big thick gloves. She asked why I was doing that and I told her about the viciousness of the lorises. She looked at them and said that they couldn’t hurt anyone and besides, it wouldn’t be any fun to use gloves. I raised an eyebrow and said ‘be my guest’. Two hours later, with her hand still painfully throbbing merrily away despite the many ice packs on it, I asked her if she was having fun yet!

Of course this is an evolutionary puzzle, since if this is an adaptation, which it certainly appears to be, what were the intermediate evolutionary stages of the “poison patch,” and how were they adaptive? A paper in Naturwissenschaften suggests that the active protein in loris “venom” is an allergen, most similar to one seen in cats.

At any rate, slow lorises aren’t always mean.  Here’s one enjoying a good tickling.  Take that, P. Z.!!!

Thanks to Matthew Cobb for calling this to my attention. By the way, he’s just published a great new book on the French Resistance. Yes, it’s odd for a biologist to do this, but he’s a polymath.