10 Human Universals that Should be Fully Embraced (… or Appreciating the Flip Side of Diversity)

Diversity in all its incarnations is awesome and beautiful. It’s the spice of life. And in modern times, educational institutions have become enlightened regarding the importance of embracing, understanding, respecting, and appreciating diversity. And this trend in modern education – and in our broader set of societal institutions – is really a great thing about living now.

We learn to appreciate diversity in so many human domains – and this is an important element of tolerance and respectful living. We are educated in the nature of diversity in cultural phenomena, such as language, religion, and music. And we are educated in the nature of diversity in contexts that extend beyond our own species, learning to appreciate the diversity in such phenomena as dog breeds (think Great Dane versus Miniature Daschund), ecosystems (think high desert versus equatorial tropics), food (think cheeseburger versus sushi), and more. Darwin’s (1859) exposition of natural selection, in fact, presents diversity as a core element of the basic processes that underlie evolution.

This said, the evolutionary approach to human behavior (i.e., evolutionary psychology; see Geher, 2014) has shed important light on the nature of human universals. Human universals are, essentially, qualities that, due to our shared evolutionary history, characterize humans across the globe. As renowned applied psychologist Kalman Glantz (2012) pointed out in a memorable presentation at a conference of the NorthEastern Evolutionary Psychology Society (NEEPS) in Plymouth, NH, human beings would be wise to embrace the many basic qualities that we all share in common just as much as we embrace the facets of diversity which highlight our differences.

Maybe educational institutions can develop programs that help students of all ages understand and appreciate the nature of human universals. Maybe curricula from pre-K to the PhD level can help people build tolerance of others by underscoring what we all have in common as a function of our shared evolutionary history.

In this spirit, to put a face to this idea of embracing human universals, here’s a list of 10 qualities of humans that characterize our kind – from Argentina and Alabama to Zimbabwe and Zurich.

10. Across human populations, infants cry to communicate basic needs.

9. The emotional expressions that signal happiness, joy, surprise, and anger, are recognizable and constant in all human populations.

8. Humans form groups based on qualities that cut across kinship lines, such as shared religion, political affiliation, tribe, or favorite sports team.

7. While the details vary from group to group, human groups have specific traditions regarding such events as marriage, the birth of a child, or the death of a loved one.

6. Music truly is a human universal.

5. People dislike, and are often afraid of, stimuli that would have threatened the safety of our ancestors, such as parasitic insects and venomous snakes.

4. Kinship matters – and affects social organization in all human groups that have ever been studied.

3. Humans everywhere have the capacity to learn language.

2. Humans across the globe demonstrate a strong need for connections with other humans.

1. People everywhere have the capacity for laughter and joy.

This list is, of course, remarkably incomplete – but I hope it’s a good start in helping people appreciate the importance of human universals – qualities that characterize people everywhere – near and far.

References

Darwin, C. (1859). On the Origin of Species by Means of Natural Selection, or the Preservation of Favoured Races in the Struggle for Life (1st ed.). London: John Murray.

Geher, G. (2014). Evolutionary Psychology 101. New York: Springer.

Glantz, K. (2012). Presentation at the 6th annual meeting of the NorthEastern Evolutionary Psychology Society (NEEPS). Plymouth, NH.

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Menstrual Huts Signal Paternal Certainty

http://www.pnas.org/content/early/2012/05/30/1110442109.full.pdf+html?with-ds=yes

http://www.pnas.org/content/early/2012/05/30/1110442109.full.pdf+html?with-ds=yes

An article from 2012 by Beverly Strassmann & colleagues is the first piece I think I’ve read that connects religious signaling to actual reproductive fitness, instead of merely group commitment (not that there’s anything wrong with that).  They analyzed genetic data from 1,706 father-son pairs from 10 Dogon villages in West Africa with 29 overlapping patrilineages & found a significantly lower rate of cuckoldry among those practicing the indigenous Dogon religion than among those practicing Catholicism.  There was no significant difference between the indigenous religion & Muslims or between Catholics & Muslims (& there were too few Protestants to sample–they should come to Alabama).

The significance of all this is in what is essentially the practice of patrilineage mating guarding via menstrual huts institutionalized in the traditional religion.  Women are exiled to a hut near their husband’s family for 5 days during their menstruation & coerced to stay there via threat of supernatural punishment.  Hormonal data indicate women internalize this fear (no details on this, but it points to a 1992 Strassmann paper) & thus to willingly to the huts, sending an honest signal of fertility & fidelity.  The Dogon do not practice contraception, & women rarely menstruate because pregnancy quickly follows the periods of lactational amenorrhea.  But when she goes to the menstrual hut, the husband’s family is informed of her “cuckoldry risk” & precautions against it “include postmenstrual copulation initiated by the husband and enhanced vigilance by his family.”PNAS-2012-Strassmann-1110442109_Page_03

The authors suggest that Islam does not jeopardize paternal certainty because it has adapted other measures to replace the menstrual hut, which, because transition to Christianity is more recent, have not yet taken place among those converts.  Additionally, though not statistically predicative of paternal certainty, Christians tend to be poorer Dogon, who may choose it less for the sexual freedom it affords women so much as the affordable alternative to the indigenous practices, because its ritual costs are far less (the Dogon religion is unpopular for a variety of reasons among the urbanites & those who migrate to the cities).

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Television News, Embedments, & Cognitive Evolutionary Literary Studies

Bill Evans, from his blog Media Adaptor

Bill Evans, from his blog Media Adaptor

I just met Bill Evans earlier this semester, who is a professor in the Department of Telecommunications & Film here at the University of Alabama & has had an abiding interest in evolutionary approaches to media analysis. I feel this connection is a new horizon for our EvoS program, as he is a resource for non-science students who nevertheless want to integrate an evolutionary perspective into their work. I hope he has the same sentiment & subsequent experience, as we are venturing into some joint research vis-a-vis evolution & media effects. I say this by way of introducing a piece I read by him (& that he summarized on this own blog here) that came out earlier this year in what I fear was the last issue of The Evolutionary Review, edited by EvoS Consortium & Newpaltzian friend & colleague Alice Andrews. The essay, “Television News Audiences as Tribes, Television News as Moral Alliance,” analyzes TV news as

an ingenious human innovation for surveying the emotionally salient aspects of a social environment that has become too vast to traverse and too disbanded to gossip about in person.

Following Robin Dunbar’s “social brain” model, once our alliances grow too large & hierarchical to monitor firsthand, we rely on proxy mechanisms or even stand-ins.  (This is something like Richard Alexander’s suggestion that the arts are surrogate mechanisms for scenario-building but not quite.  Rather they are probably complementary, but I am digressing & will have to work that out another time.)  What we’re monitoring is the presence of friends or foes, things to approach or withdrawal from.

And to extend this line of Bill’s thought, I wonder if city dwellers rely on TV stand-ins more than rural denizens? Ironic as it might sound from a social intelligence perspective but intuitive from an urban studies one, overpopulation breeds distrust & the retraction of social networks. You are more likely to get mugged in broad daylight in a congested population than a small one, & though it might seem like I’m talking about NYC or something, these data come from studies of Japanese macaques in zoos where they are overprovisioned.  Check out the high stress these monkeys experience in, I believe, the film “Monkey in the Mirror.”

Our friends or foes on TV are reflected in their moral stance, which we most quickly assess thru partisan political views.  Though we look to other forms of media for the same signals of commitment to our cause,

television makes available the facial and vocal behavior of people…[so] viewers have more direct access than readers to the emotional state of quoted sources.

Despite the stance of objectivity previously associated with the gathering & dissemination of news, broadcasters have realized that emotional displays are more captivating for viewers & some have dispensed with any show of objectivity on networks.  Instead, newscasters convey emotion through tone & expression, & producers “frame events as threats to viewers.”

Kelly Horwitz, Loretta Lynn, & Marvin Lucas

Kelly Horwitz, Loretta Lynn, & Marvin Lucas care about children!

Bill also turned me on to some scholars I need to read up on.  One, Jonathan Haidt, I am quite familiar with but have yet to read.  Haidt’s deconstruction of the conservatism-liberalism spectrum as comprising 5 moral intuitions–care, fairness, loyalty, authority, & purity–is really quite compelling & mindblowing.  Though conservatives & liberals often portray each other as somehow immoral & wonder at what appear to be immoral choices or judgments made by the others.  Although we know there’s more nuance underlying these choices–for we all have friends or family who are on the opposite end of the political spectrum from ourselves–we judge the morality of strangers based merely on political affiliation (when campaigning for our non-partisan school board election recently, one drunk father of a UA student interrogated my wife: “What is Kelly Horwitz? What’s she want to do?” “Well,” my wife answered, “it’s a non-partisan election.  Kelly simply wants what’s best for the children.”  “The children?! Then she’s a democrat! We don’t vote for democrats!” the man spat & threw the info card she’d given him down). For instance, a friend of mine in grad school said she & her husband found it less complicated to simply tell their daughter that George Bush (prez at the time) & Ronald McDonald are evil than to explain any of the morally, politically, economically, or nutritionally complex subtext.  I thought this was totally justified at the time, & my wife & I adopted a similar tack.  Unteaching such reactionism has been our punishment.  The point being that conservatives & liberals value the 5 moral intuitions in different concentrations, which gives them their flavors, “with liberal relying more heavily than conservatives on intuitions related to care and fairness.  Liberals rely far less heavily than conservatives on intuitions related to loyalty, authority, and purity.”

How do they feel about children?  Delicious? (Source for photo on left: Melissa Brown / Al.com)

Here is a clip (left) from our local media (Melissa Brown / Al.com). How do they feel about children? Delicious?

So, in a nutshell, TV news provides gossip about a whole panoply of people & issues, resplendent with facial expressions & tone heavy with implication.  We find our allies on TV news, the ones that share our moral intuitions, & value their “gossip” over that of newscasters who are not part of our “alliance.”

The other scholar Bill turned me on to but have never heard of is Lisa Zunshine (watch I’m gonna go to the office Monday & find a book of hers sitting on my shelf that I’ve never gotten to–always happens that way when I admit my lack of literacy in public).  She applies cognitive science to literary analysis &, in particular, theory of mind.  This is really astounding.  And obvious.  She gives credit to Alan Parker, who apparently has pointed out that “novel reading is mind-reading.”  I read parts of two articles of Zunshine’s available on her website (thanks for making it so easy!).

Not sure this photo is gonna win me friendship with Lisa Zunshine, but I found it online & it is awesome.  What a great photo.  And I'm being totally sincere.  If you are looking to me for moral guidance, you already know that I am not mocking her, as any glance thru the jackassery of photos of me online can attest.

Not sure this photo is gonna win me friendship with Lisa Zunshine, but I found it online & it is awesome. What a great photo. And I’m being totally sincere. If you are looking to me for moral guidance, you already know that I am not mocking her, as any glance thru the jackassery of photos of me online can attest.

The first is a draft of a piece in progress for Interdisciplinary Literary Studies called “‘Theory of Mind’ as a Pedagogical Tool.”  She says something I consider important & mention in a blog post I wrote up but am afraid to publish lest some journal editor refuses to consider a future version for peer review some day (just getting it out there that I thought of this, even though I can’t prove it–no doubt I read it somewhere else & forgot & think I thought of it myself anyway, so whatever):

…Our daily mind-reading is largely unselfconscious and mostly wrong.  We don’t go around consciously articulating to ourselves our intuitions about other people’s mental states and we don’t really know what people are thinking—which doesn’t prevent us, however, from acting on our unarticulated, wrong, or only approximately correct intuitions.

I didn’t say the following though, but have only thought about it in inchoate, inarticulate ways for years, searching in my mind to explain why the arts seems intuitively important from an evolutionary perspective:

Fiction plays and experiments with the fact that we can’t stop reading minds and that we don’t read minds correctly.  Both writing and reading fiction (as well as making and watching movies and plays) are thus profoundly social endeavors because they build on the same imperfect adaptations for attributing mental states that underlie our daily social interactions.

Furthermore, fiction embeds mental states within mental states within mental states.  In a piece she wrote called “Style Brings in Mental States,” she points out that style itself can imply embedments that the reader intuits or projects, even when the rhetoric does not.  For instance, she contrasts two pieces, written purposefully to be free of mental states.  I’ll present them in the opposite order she did.  The second reads

I drove the motorcycle half-way across the country, alone.  I saw 21 states, 6 sunrises and 6 sunsets, while quietly sitting on a seat that measures no more than fourteen inches across.  The seat is a magic carpet that whizzes through space at 80 miles per hour, supported by two wheels and an aluminum frame.  i was connect to America through that seat, and those little foot pegs that jut out from the lower part of the bike.  Motorcycling is high-speed meditation.

I’m not sure how the author thought that the metaphors of the magic carpet or being connected to America weren’t conveying mental states, but the whole piece, stitched together that way, conveys a whole theme that Zunshine outlines but which I can summarizes as exemplifying the Robert Pirsig’s narrator in Zen & the Art of Motorcycle Maintenance.  I read that book over 25 years ago & still have a strong sense of the narrator’s mental state (wrong or not).

The piece, supposedly sans mental state insinuations, reads

I went grocery shopping two days ago.  In the produce section, I got tomatoes, avocadoes, spinach, cilantro, green onion, and cauliflower. I also got fruit: apples, strawberries, grapes, and a watermelon. In the dairy section, I got milk, eggs, cheese, and yogurt. In the meat section, I got flounder and ground beef. I also bought olive oil, vinegar, dry beans, canned sardines, and paper towels.

By itself, this piece reads like it’s out of a children’s “how-to-read” book or an ESL workbook.  Paraphrasing fiction & getting rid of mental states renders a fictional work purely factual, like Cliff Notes or something, which purposefully “downgrade the level of sociocognitive complexity…”

If we imagined the latter passage as part of a larger text, however, Zunshine points out,

Its very inanity would be perceived as stylized and thus working toward particular narrative ends. We will be talking, for example, about the speaker’s “flattening of affect” and wondering what caused this particular mental state in that character. In other words, what passes for the absence of mental states in the context of one genre (or, by extension, historical period) may acquire sociocognitive complexity when read within the context of a different genre (or a different historical period).

Finally, & what appeals to me as a diversity-loving anthropologist (& should appeal to any Darwinist, since variation is the necessary prerequisite for natural selection), is Zunshine’s summary.

What this all adds up to is that making strong “universal” claims about theory of mind and fiction hardly “flattens out variation”–instead, it forcefully focuses our attention on particularities of individual writing style and the context in which the text is read.

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Biological Psychiatry and Evolution

After a length absence due to my acceptance into Suffolk University’s clinical Ph.D. program, I intend to delve back into this blog again!

A brief entry today; I was referred to this passage from a paper by Douglas A. Kramer (2005), which I will quote at length.

Bowlby (1988) lamented the “physiological psychiatrists who have improperly kidnapped the label biological psychiatry.” Various other names for this more comprehensive biological psychiatry have been proposed, e.g., ethological psychiatry (McGuire and Fairbanks, 1977), developmental psychiatry (Bowlby, 1988), and Darwinian psychiatry (McGuire and Troisi, 1998), but none have attracted broad interest among psychiatrists. “Ethological psychiatry” does have the advantage of being the most inclusive (Kramer and McKinney, 1979), does account for the four general categories (control, development, function, and evolution) of understanding behavior biologically as described by Tinbergen (1951), and is the biological science identified by Bowlby (1969) as the scientific basis for a comprehensive biological psychiatry. However, it suffers from its origins as a science based on observing animals in their natural environment, i.e., in the field rather than the laboratory. I anticipate that the term biological psychiatry will come to designate the comprehensive biological psychiatry that Bowlby and Rutter pioneered and that the organizing principle will be developmental psychobiology. (p. 26)

When you think of “biological psychiatry,” “biological psychology,” or “biological” anything, for that matter, do you only think of physiology? I certainly often do, despite the fact that I believe that evolution is the cornerstone of biology. The term certainly has been hijacked, in my opinion, although most likely without malice.

References

Kramer, D. A. (2005). Commentary: Gene-environment interplay in the context of genetics, epigenetics, and gene expression. Journal of the American Academy of Child & Adolescent Psychiatry44(1), 19-27.

 

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You Can Minor in Evolutionary Studies & Start as an Assistant Professor in a Business School at $150k per Year

After that little bombshell, I just sort of zoned out & walked thru the rest of the day in a dissociative fugue, wondering about how different it would have been had I known that 15 years ago. I would love to be doing evolutionary applications to economics…Kidding (sort of, not really…maybe just the dissociative fugue part).

A.J. McCarron displaying his brachiator preadaptations

A.J. McCarron showing off his brachiator preadaptations

As we sat there talking to my “Biology, Culture, & Evolution” class, we riffed on football & the big game with LSU that was coming up that weekend (we kicked their asses, importantly). Football is always on our minds down here this time of year (& most of the rest), & I generally find it a convenient trope for discussing many things from an evolutionary perspective (for instance, how well could A.J. McCarron throw the ball w/o brachiator shoulder preadaptations?).

The “we” in question included Gad Saad, Professor of Marketing at Concordia University (Montreal, Canada) & holder of the Concordia University Research Chair in Evolutionary Behavioral Sciences & Darwinian Consumption. In his latest book, The Consuming Instinct, which he would be discussing at that night’s ALLELE lecture, Saad writes of the serious implications of our evolved tendency toward group affiliation & benefits of reciprocal altruism in discussing his Jewish family’s flight from Lebanon in 1975 when civil war erupted.

Though my parents’ established social networks, we were able to hire Palestinian militia to drive us to the Beirut International Airport to catch a flight out of Lebanon (after having witnessed several months of the most extraordinary violence that could ever be documented). Obtaining the protection from the PLO militia was crucial, as they controlled the passage to the airport. Hence, there was no other way to escape the carnage without the help of Muslim militia. I do not wish to make it sound as though they protected us out of the kindness of their hearts; if memory serves, there was a substantial payment for rendering such a protective service. However, my point in recounting this very painful & traumatic period of my life is to highlight the power of social networks & long-lasting friendships in that part of the world. To the people who helped us, we were friends. This trumped the fact that we were Jews.

Gad Saad talking with students from "Biology, Culture, & Evolution"

Gad Saad talking with students from “Biology, Culture, & Evolution”

Less personally serious but more insidious (perhaps) is the way media co-opts our evolved tendency to display these allegiances. This is apparent in numerous ways but none more so in my local culture than with regard to the Alabama Crimson Tide. As Saad says,

I have long been a supporter of the French national soccer team, so I was delighted when they reached the World Cup Final in 2006. I remember vividly the morning of the big match. My companion & I took our dog for a walk, & she noticed that I was visibly tense. “What’s wrong?” she asked, to which I replied that I was nervous about the upcoming final. One might think that this is irrational. After all, I do not know any of the players personally.  I am not a French citizen. I did not have a monetary bet riding on the game. Yet I was experiencing the physical symptoms of stress that should be reserved for the players who were about to partake in this historic event. The power of affiliation that I felt for the French players had resulted in a vicarious emotional & physiological reaction in me. This innate capacity to band with an in-group & dis-associate from out-group members is at the root of sports viewing.

Indeed, before moving to Alabama, I could have cared less about football, or any sport for that matter. My friends from elsewhere still chuckle at the rabid fanaticism I now display, as exemplified by my Facebook & Twitter updates during & around games (which now extends not just to the Alabama football team but also my hometown Indianapolis Colts & Pacers as well). My wife jokes that it’s ironic I watch football to relax because I display so little joy during close games. Last year, when the Tide nearly lost to LSU, I was so tense throughout the game that the muscles in my neck cramped up painfully. When we won on a screen pass to T.J. Yeldon during the final two-minute offensive drive, I was so elated & worked up that I went for a midnight jog in my neighborhood. Although this had been an away game, there were drunk fans celebrating everywhere yelling “Roll Tide!” One pair yelled to me as they were dangling precariously from the second-story eaves of a house. A group around the corner hollered “ROLL TIDE!” from their porch. When I panted “Roll (puff) Tide” back, they responded accusingly, “THAT didn’t sound passionate! You sure you ain’t an LSU fan?!”

When Bama played Texas A&M the following week & got down by 3 touchdowns in the first quarter, I was so agitated I had to turn the TV off & clean the house. I can hear the stadium from our house & would only turn it back on if I heard loud cheering (101,000+ people cheer pretty loudly). That is one of the few games I’ve missed, &, even though I know the outcome, hearing about the final drive when we were 1st & goal & opted to throw the ball 3 times, finally resulting in an interception & loss, instead of running the ball (we have an AWESOME running game) still causes me somatic discomfort. This even though by some freak happenstance all the other undefeated teams went out & lost the following week & we still ended up in the championship game & won easily & decisively.

The coalitional behaviors of the players themselves are a critical aspect too. Last week, after the Miami Dolphins bullying story broke, the sports radio show “The Opening Drive” on Jox 94.5 had UAB Clinical Psychologist Josh Klapow on to talk about it. I was elated to hear him discuss how displays of group commitment were important in our evolutionary history for our very survival–you wanted to ensure that the group accept & protect you, he said (paraphrasing). It’s not so simple to say that the guy was bullied & it’s wrong–the more dangerous important the group behavior is, the harsher/more dangerous the rituals to ensure commitment are likely to be, he said (again, paraphrasing). This is essentially the argument of costly honest signaling theory as applied by Rich Sosis & colleagues in “Scars for War.”

We were talking about how, because fandom is a by-product of our coalitional commitment, our testosterone goes up just like the winners of the actual competition. “I wonder if this leads us as fans to engage in risk-taking behavior more after football games when we win?” I said.

“There’s a study you can do,” said Saad. “You could stand outside your stadium after your team wins,” he said, or something to this effect, “& administer a Fidelity risk tolerance questionnaire.”

Lunch with the EvoS Club

Lunch with the EvoS Club

“The fans leaving the games are certainly assholes,” I said, remembering harassment I endured at the hands of Bama fans when I went for a late night jog after a recent home game against Arkansas. “Remind me not to go jogging after a game to burn off steam again. Apparently, they can’t control themselves when they are overcome by testosterone.”

I was thinking he was suggesting we assess people’s willingness to cheat on their spouses after a big win & was wondering how in the hell we’d get something like that thru IRB, though it seemed like an interesting study idea. I now realize he was talking about a risk tolerance questionnaire, such as the one designed by Fidelity, to determine the financial personality profiles of investors. This is an even better idea, as it’s more practical & something I’d never think of in a million years.

My student Johnna Dominguez did a study similar to this a few years ago. She assessed well-being in football fans over the course of a semester. Fortunately & unfortunately, it was the only semester since I’ve been here that Alabama hasn’t won the BCS national champions. Fortunately, because losing introduced environmental variation into her study, so she could really get a sense of how the climate around the games influenced student fan well-being. Unfortunately, because we lost 3 games, & her compliance rate plummetted so badly she couldn’t fully analyze her final data. We believe they were related phenomena.

Gad Saad giving ALLELE lecture

Gad Saad giving ALLELE lecture

Saad’s thesis, laid out in The Consuming Instinct, that our interest in sports, as I say, is a byproduct of our evolved coalitional tendencies, is not novel or controversial. As far as I know, this is pretty standard Durkheimian structural-functionalist theory in the anthropology of sports. Our tendency to see opposing teams & their fans as The Other & to take a war-like stance toward them maps perfectly onto the strategies & head-on clash of football.

Saad denigrated American football to some extent, pointing out that, despite the rabid zeal of SEC football, fandom of European football–aka soccer–is altogether more impassioned, nationalistic, primal, & mortal a form of surrogate combat, given the tendencies for football hooliganism to turn to real life rioting & bloodshed. While that may be true of fans–& Alabama football fans are definitely more genteel, taking their bloodshed out on innocent trees rather than people–the on-pitch battle is far more concussive & traumatic than soccer. But my point is this. We have a fantastic natural experiment here & data waiting to be collected.

 

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What about a Lentil is Less Creative?

Heading in different directions. Bulges in the brains of modern human infants make our adult brains (above, blue) rounder than those of Neandertals adults (top, red). CREDITS: (NEONATES) P. GUNZ ET AL., CURRENT BIOLOGY 20, 21 (9 NOVEMBER 2010); (ADULTS) PHILIPP GUNZ, MPI EVA LEIPZIG

Heading in different directions. Bulges in the brains of modern human infants make our adult brains (above, blue) rounder than those of Neandertals adults (top, red).
CREDITS: (NEONATES) P. GUNZ ET AL., CURRENT BIOLOGY 20, 21 (9 NOVEMBER 2010); (ADULTS) PHILIPP GUNZ, MPI EVA LEIPZIG

Catching up again on articles sent to me over the past few years, a 2010 Science summary by Ann Gibbons of a Current Biology piece by Philipp Gunz & colleagues (“Brain development after birth differs between Neanderthals and modern humans”) indicates that the globular shape of human brains may diverge from the lenticular shape of Neanderthal brains because of expansion in the parietal, temporal, & cerebellar regions among Homo sapiens during infancy.

Like chimpanzees, Neanderthals apparently skip a phase during which infant Homo sapiens expand certain regions of the brain, when the dome of the H. sapiens skull rounds into its distinctive globular shape…

In living people, those areas of the brain are linked with key functions such as the ability to integrate sensory information and to form abstract representations of the environment.

Full-size image (73 K)

Figure 1.
Neanderthal and modern human brains grow differently.
(A) For the virtual reconstruction of the Neanderthal neonate Le Moustier 2, CT scans of individual fragments were assembled on the computer. Fragments that were mirror-imaged to the other side are plotted in a darker shade. The gray surface represents estimated missing data. At birth, Neanderthals and modern humans have very similar endocranial volumes and shapes (red: Le Moustier 2; blue: modern human). (B) A principal component analysis of endocranial shape changes from birth (age group 1) to adulthood (age group 6). The convex hulls for modern humans (blue) are based on dental age groups. The fossil convex hull (red) is based on the Neanderthal adults only. The average developmental trajectory is plotted as a solid line. Endocranial mean shapes visualize the shape change during the modern human globularization phase between age groups 1 and 2. All fossils were reconstructed multiple times; each distribution of reconstructions falls within the respective semitransparent disks (Neanderthal specimens: LeM2 — Le Moustier 2; Pech – Pech de l’Azé; R – Roc de Marsal; E – Engis 2; M1 – Le Moustier 1; Gu – Guattari; Fe – La Ferrassie 1; Gi – Gibraltar; Ch — La Chapelle-aux-Saints. Archaic Homo: Kb — Kabwe; Pe — Petralona).

Steven Mithen's model of the mind as a cathedral

Steven Mithen’s model of the mind as a cathedral

This supports a model proposed by cognitive archaeologist Steven Mithen in his 1996 book The Prehistory of the Mind.  Mithen suggests that humans may have outcompeted Neanderthals because our ancestors were capable of more creativity. This may have been possible because H. sapiens brains were more modullarly integrated. Following Howard Gardner’s model of multiple intelligences, Mithen hypothesizes that the increasing encephalization of Homo brains was the result of the exaptation of intelligences for novel purposes & development of new areas with unique specializations (such as the prefrontal cortex). Mithen proposes that the integration of those modules varied (& varies). These general purpose modules, for such things as technical intelligence, linguistic intelligence, social intelligence, & natural history intelligence, became more integrated in H. sapiens than H. neandertalensis. The proximity of neural tissues from one intelligence area traveling through that of another facilitated dendritic connections that were otherwise too distant to be likely, facilitating creativity by enabling our ancestors to borrow a way of doing things from one area of intelligence & using it in another realm.

Mithen suggests that spacial orientations of living floors may reflect cognitive orientations & points to the differences between Neanderthal & H. sapiens living floors as indicative of his thesis. Neanderthal modes of living, like their brains, are spacially separated, whereas those of H. sapiens are concentrically oriented around campfires & hearths. This physical proximity of different activities may be reflective of neural correlates & also reinforce them, providing people the opportunity to see other activities being conducted & get new ideas.

Depiction of Neandertal camp, disjointed in space (top), & H. sapiens camp, concentrically oriented around the campfire (bottom)

Depiction of Neandertal camp, disjointed in space (top), & H. sapiens camp, concentrically oriented around the campfire (bottom)

While this model remains largely speculative, the Current Biology study lends it support in areas of the brain that would have been critical to the development of creativity & modular integration.

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Top 10 Evolutionary Mismatches: How Modern Humans are Living in the Monkey House

In 2012, after being home to various classes of primates for some 100+ years, the renowned Monkey House at the Bronx Zoo closed down – and the current primate residents at the Zoo reside in habitats that are designed to match the natural habitats of the various species. This event is part of a broader movement in zoos across the world – based on the highly reasonable idea that all species have evolved to fit particular environmental conditions. Such features that typify the ancestral conditions of an organism characterize the organism’s Environment of Evolutionary Adaptedness or EEA (Bowlby, 1969). Housing a monkey, whose ancestors go millions of years deep into specific African jungle environments, in a small cage in the zoo of a large city is simply evolutionarily misguided – and arguably, as a result, cruel. Animals essentially need to have many key features of their ancestral environments in their current conditions – as their bodies and minds are the result of evolutionary processes that took place under these specific conditions. In an evolutionarily novel and unnatural environment, solid research shows that various primates will demonstrate signs of physiological and psychological stress (see Harlow & Suomi, 1971).

And this idea critically relates to the nature of being human in modern times. If you live in a modern, Westernized part of the world (as is almost necessarily true if you’re reading this on the web – or reading this at all right now …), then you are, in many ways (metaphorically), living in a cage in a zoo.

A key principle of evolutionary psychology (see Geher, 2014) is the notion that modern humans in Westernized societies experience important instances of evolutionary mismatch. From the evolutionary perspective, understanding the topic of evolutionary mismatch is essential in allowing us to understand so much of what it means to be human.

Here is a list of 10 ways that modern, Westernized humans, like you (and me), are, in the words of Kurt Vonnegut, living “in the Monkey House” …

10. You are surrounded in your day-to-day life by a higher proportion of strangers than would have ever been true of our pre-agrarian hominid ancestors.

9. You run into a higher total number of people than would have ever been true of our pre-agrarian hominid ancestors.

8. You have the option of spending 90% of your waking hours sitting at a desk – and you often exercise this option.

7. Your extended family includes people who are dispersed across hundreds or thousands of miles (think New York and Florida …).

6. You have been exposed to more images of violence (via movies, etc.) than would have ever been possible for pre-agrarian hominids.

5. You were likely educated in an age-stratified system – spending each of several years in a group comprised of about 25 others who matched you in age – and being taught in a classroom environment by a few specially designated “teachers.” You likely spent a lot of time sitting behind desks in the process.

4. You are exposed regularly to politics at a global scale – often discussing or being involved in issues that potentially pertain to thousands, millions, or even billions of other humans.

3. You were raised in some variant of a nuclear family – with less assistance from aunts, uncles, older cousins, and grandparents, than would have been typical of our nomadic ancestors.

2. You spend a great deal of time interacting with “screens” and “devices” – having the evolutionarily unprecedented possibility of almost never having to be bored at all.

1. You can eat an entire diet of processed foods – and you live in a world where processed foods (think McDonald’s …) are cheaper and more accessible than natural foods.

Note that this list is, certainly, incomplete and preliminary at best – there are clearly and undoubtedly other worthy contenders for this list! That said, I’m hopeful that this list can help open the eyes of those interested in human psychology to the importance of evolutionary mismatch in understanding all aspects of who we are.

As Kurt Vonnegut wrote: Welcome to the Monkey House.

References

Bowlby, J. (1969). Attachment and loss. Vol. 1. Attachment. New York: Basic Books.

Geher, G. (2014). Evolutionary Psychology 101. New York: Springer. 

Harlow, H.F., & Suomi, S. J. (1971). Social Recovery by Isolation-Reared Monkeys, Proceedings of the National Academy of Science of the United States of America,  68, 1534-1538.

Vonnegut, K. (1968). Welcome to the Monkey House. New York: Delacorte Press.

 

 

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Why James Bond flaunts women (and why you should watch Bourne movies)

James Bond. High status, clever, cunning. Men want to be him, as they say, and women want to be with him. Although he might be slightly antiquated in a post-Bourne world of action heroes, he still resonates. Last year’s latest Bond movie, Skyfall, performed admirably at the box office, proving that, if nothing else, men and women still want to see him. The modern, Daniel Craig version of Bond is more morose and more reflective than the old Bonds were, but he shares much with those older incarnations. He is still dashing, clever, dapper, and he is still surrounded by a bevy of beautiful women, many of whom he eventually seduces. The attention that he commands from these women might reflect an underlying sexism in the film industry, as my feminist friends would undoubtedly argue, but it also conveys something to the viewer: Bond possesses high quality traits.

What do I mean by this? Well, consider an alternative Bond. Call him BondX. Suppose that this BondX were exactly the same as Bond, except that he repulsed women. Instead of commanding attention and the fawning admiration of beautiful women, BondX is consistently ignored or even degraded by such women. On the rare occasion that he gets close enough to a lovely woman to make a move, he is summarily rejected. He still kills villains, still drinks scotch, and still avoids imminent death while offering irreverent witticisms (“shocking,” “I’d say that’s a waste of perfectly good scotch”). But, he has absolutely no luck with the ladies. We might think BondX cool, but would he be the cultural icon he is today? Or might we assume that there is something about BondX, something hidden from us but exposed by the women around him, that is unsavory, undignified, unappealing?

Perhaps a person’s romantic partner (s) serve an important signaling function, broadcasting information to the social world about that person’s underlying traits? My brother, Ben Winegard, and I have argued just this. Using the basic principles of signaling theory, we argued that a person’s mate (s) function similarly to other prestige goods (e.g., expensive watches, rare scotches, large houses) and communicates important information about the quality of the signaler’s underlying traits. Perceivers of the signal therefore infer certain things about the quality of the signaler based on the quality of his or her signal. (Yes, women show off mates and they are also judged based on the quality of their mates.) If true, we reasoned that both men and women should “flaunt” or showoff attractive mates and “conceal” or hide unattractive mates. We call these “mate flaunting,” and “mate concealing” respectively*.

Our research has strongly supported our theoretically based intuitions. In an article published in PlosOne (Winegard, Winegard, & Geary, 2013), we showed that men and women flaunt, and that men, but not women conceal (this was, however, close to significance). Specifically, we had participants come to a lab. We then told the participants that previous research showed that survey responses were more favorable when the survey distributors were happy couples. We were interested, we said, in this hypothesis. So some of the participants would distribute surveys with an other-sex partner and some would distribute them alone. Those who had a partner were to pretend that they and their partner were in a happy relationship. We then gave them a pamphlet that included a picture of their supposed partners, a choice of locations, and asked a few questions about their expectations during the surveying experience (e.g., about how others will view them, how anxious they will feel). We then gave them a choice between two locations. One was described as rife with other undergraduates (relevant peer group) and one was described as comprised of older administrators (not relevant peer group). We reasoned that if they wanted to flaunt a mate, they would choose the undergraduate location and that if they wanted to conceal a mate they would choose the administrative location. This supposition was supported with other measures.

We manipulated the attractiveness of the putative partners by using either a photograph of a man/woman from the top 90th percentile pre-rated photographs or a photograph of a man/woman from the bottom 90th percentile. There was, in other words, a large disparity between the attractive partners and the unattractive partners.

As predicted, both men and women desired the undergraduate location more when ostensibly partnered with attractive members of the other sex than when partnered with unattractive members of the other sex. (The desire for location was measured on a five-point scale, ranging from 1 = very strongly prefer administrative location, to 3 = no preference, to 5 = very strongly prefer the undergraduate location. We ran a control to check baseline preferences, and the baselines did not differ significantly from 3, or no preference.) That is, men and women flaunt. Men, but not women, also concealed. We have since replicated those results twice, and discovered that, contrary to the expectations of Vakirtzis and Roberts (see, for example, 2009, 2010), men actually prefer to flaunt to other men. Furthermore, the status that is granted to those who flaunt very closely resembles the status that is granted to those who flaunt luxury goods. We believe this provides excellent support for a signaling account of mate flaunting.

James Bond might be anachronistic and sexist. But the technique of indicating status through the affections and attention of the other sex is probably not going to disappear anytime soon. Like conspicuous consumption, mate flaunting might be an unfortunate but almost inevitable byproduct of our relatively noble desire to display the quality of our underlying traits. I am hopeful that this desire might find more salubrious outlets in the future. Perhaps we can learn to flaunt our commitments to nice people or our rejection of the superficial. (In an episode of Curb Your Enthusiasm, there was a display of “reverse mate flaunting.” Larry, the show’s antihero, explicitly stopped working with men who had beautiful partners because he believed it evidence of superficiality.) I am also hopeful that we will eventually destroy all nuclear missiles and develop harmonious global relations. I am not optimistic about the prospects for either.

 

 

*Before proceeding, I should note that Vakirtzis and Roberts (2009, 2010; Vakirtzis, 2011) forwarded similar ideas. Whereas their research stemmed from mate copying literature, the current ideas stem from signaling theory. Readers are advised to examine their important articles. In fact, the term “flaunting a mate” comes from their research.

 

REFERENCES

Vakirtzis, A., & Roberts, S. C. (2009). Mate choice copying and mate quality bias: different processes, different species. Behavioral Ecology20, 908-911.

Vakirtzis, A., & Roberts, S. C. (2010). Nonindependent mate choice in monogamy. Behavioral Ecology21, 898-901.

Vakirtzis, A. (2011). Mate choice copying and nonindependent mate choice: a critical review. In Annales Zoologici Fennici, 48,  91-107.

Winegard, B. M., Winegard, B., & Geary, D. C. (2013). If You’ve Got It, Flaunt It: Humans Flaunt Attractive Partners to Enhance Their Status and Desirability. PloS ONE8, e72000.
 

 

 

 

 

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Hey there, Lil’ Red Riding Hood, You Sure are Lookin’ Good..

Figure 1 Map of the approximate locations from which tales were sourced.

Map of the approximate locations from which tales were sourced.

You’re everything a big bad wolf could want…

This is cool as shit. Thanks to Lee Dugatkin for sharing on Facebook. Jamshid Tehrani in the Department of Anthropology & Centre for the Coevolution of Biology & Culture at Durham University has conducted a phylogenetic analysis of ‘Little Red Riding Hood’ & related cross-cultural folktales. I’d heard about this type of analyses just recently from Baba Brinkman when he was in town. I believe it was the group of UK biologists who prompted him to write the “Rap Guide to Evolution” who had also been involved in a collaboration with literature scholars using phylogenetics software. Maybe this is that group.

Figure 2 Majority-rules consensus of the most parsimonious trees returned by the cladistic analysis of the tales.

Majority-rules consensus of the most parsimonious trees returned by the cladistic analysis of the tales.

They found, in a nutshell, that the story-of-someone-&-something-that-eats-her did not develop in Asia & travel to Europe & elsewhere via the Silk Road, as previously deduced based on analyses of major themes. By analyzing, essentially, the overall numbers of shared traits, they determined that the story originated in Europe & traveled to Asia. A later variant evolved into the European version crystallized by the Grimm Bros.

This will be so awesome to share with “Evolution for Everyone” students in the Spring when we talk about evolutionary applications to the humanities. At least I think so.

And it makes me think of Sam the Sham & the Pharaohs.

 

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Don’t Look Down! How I REALLY Learned about Fear of Heights as an Adaptation

Why are people scared of high roller coasters, air travel, and walking on the edges of cliffs? In short, such a fear is, in the parlance of evolutionary psychology, “adaptive.”

Fear of heights is a human universal – and can easily be explained with an evolutionary approach. The evolutionary approach to psychology (see Geher, 2014) largely focuses on how basic aspects of our behavior and underlying psychology served a function in terms of allowing our ancestors to increase their ability to survive or reproduce. And such behavioral adaptations are still in place, even if the adaptation is not needed as much in modern conditions.  We’re scared to be high up and on the edge. And this fear helped our ancestors avoid being high up and on the edge – and, thus, helped them live to be able to become our ancestors, passing on a disposition to this basic fear (see Menzies & Clarke, 1995).

This said, here’s a little secret about academia: So often times, we write about this stuff or that stuff – hand-waving it as obviously true – assuming everyone buys what we’re saying – and moving on. Fear of heights? Of course it’s a universal and of course you know what it is! It’s a classic example, in fact, that teachers of evolutionary psychology will give in demonstrating a behavioral adaptation.

But, as is true in life, sometimes you just have to experience some phenomenon to really get it. Yesterday for our son’s 10th birthday, we took him (with some good friends) climbing on the “world’s tallest ropes course” at the Palisades Mall here in NY. Should I join the kids? Honestly, I didn’t even think twice about it. I’m in reasonably good shape and I’m aware of the math – you can’t die on this thing because the company has major liability issues they’ve got to contend with. This is America! Your harness is connected the whole time – you’ll be fine. There is no way you’ll get hurt, etc.

Well, it turns out that this particular structure is the thing in my life that truly taught me about the fear of heights! Holy crap! Before I knew it, I was about 100’ up on the edge on this small platform – that is placed high up in between tightropes that you had to cross to get to the exit (or to anywhere). Our party (with me as “the grownup”) was fully and immediately dispersed before I even blinked, and I found myself, up on this platform, nearly shaking – thinking about doing only one thing – getting to the exit! I felt like a big chicken!

Well, as you can see by the fact that I’m typing now, I made it to the exit and survived! And my son Andrew apparently is an ace at this thing – completing every obstacle on the course – quickly and with a smile … and the rest of our little crew did alright.

But for me, it was a great teaching-related moment. I’d taught about how basic and adaptive fear of heights is since I started teaching evolutionary psychology in 1998. After my “fun” experience on this wicked-high ropes course, I now understand fear of heights at a whole other level – and yes, since I made it to the exit, I still stand by the evolutionary perspective on this one – fear of heights, a classic cross-culturally universal psychological adaptation definitely facilitates behaviors that increase the likelihood of surivival!  So happy to be off that ropes course!

Oh and Happy 10th Birthday Andrew – you amaze me!

References

Geher, G. (2014). Evolutionary Psychology 101. New York: Springer

Menzies, RG; Clarke, JC. (1995). “The etiology of acrophobia and its relationship to severity and individual response patterns”. Behaviour Research and Therapy 33 (31): 499–501.

 

This Blog is cross-posted at my Psychology Today Blog, Darwin’s Subterranean World

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