Evolution

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The Custodians of Life’s Meaning

This is an inspiring video about humanism from the Carl Sagan series. Nearly every word is quote-worthy, but I’ll just pick a few of them: 
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“The significance of our lives, and our fragile planet, is then determined only by our own wisdom and courage. We are the custodians of life’s meaning. We long for a parent to care for us, to forgive us our errors, to save us from our childish mistakes. But knowledge is preferable to ignorance. Better by far to embrace the hard truth than a reassuring fable... If we crave some cosmic purpose, then let us find ourselves a worthy goal.”
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Adversity, Resilience, & Adaptation

Note: this post was inspired by the recent conversation I had with Soo Na Pak about grief and resilience.

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Now the music’s gone, but they carry on
For their spirit’s been bruised, never broken.
They will not forget, but their hearts are set
on tomorrow and peace once again.

Phil Coulter, The Town I Loved So Well1

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When I was a boy and got hurt – falling off my bike, getting hit by a baseball in the ribs, a bruised ego – my father would say to me “you’ll have a lot more of those in your life, kid.” It really wasn’t the response I was looking for at the time, which I suppose was for sympathy. My guess is that he thought a bit of cold, hard reality would do me some good. I don’t know which parental approach is the correct one, but he was undoubtedly right that adversity and getting hurt never really stop, no matter how old we are. But after being knocked down, we do our best to get up again.

My dad and I, during the great scissors shortage of 1977.

Unfortunately, we sometimes face challenging circumstances which greatly exceed falling off a bicycle – the death or loss of our loved ones, poverty, discrimination, debilitating disease or psychological trauma, famine, slavery, war, etc. Sometimes these things are chronic or even fatal, and should we be lucky enough to make it through to the other side of the tunnel, the pain can feel almost unbearable in the interim.

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Egalitarianism & Arrogance

“When men are most sure and arrogant, they are commonly the most mistaken, and have then given views to passion, without that proper deliberation and suspense which can alone secure them from the grossest absurdities.”                            – David Hume

 

Person 1: “There is no ‘I’ in ‘team.’ ”

Person 2: “True, but there is an ‘M’ and an ‘E.’ ” 

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On occasion, I have been arrogant at times in my life. To be fair to myself, I believe such episodes have been rare, and most people who know me would probably describe me as introverted, possibly even timid. More than once, I have been told that I am “too nice” and overly conciliatory. During my pre-tenure review, one committee member told me that my autobiographical narrative was too modest, and that “in academia you need to toot your own horn because nobody else is going to do it for you.” That’s probably true in most fields, but it often makes me uneasy. And if you spent some time in the cacophony in my head, you’d see there is plenty of self-doubt and insecurity in here (you’re better off not doing that). Still, like everyone else, I am complex, and have had enough instances of arrogance that they irritate me and force me to consider from where they originate.

I bring this up now because I’ve been reading about hunter-gatherer societies, and was reminded of this famous passage from the anthropologist Richard Lee (1979) on egalitarianism in the !Kung of Namibia and Botswana.

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Part 6. Humans are (Blank) -ogamous: Many Intimate Relationships

This is the sixth part on the evolution of human mating behavior, comparing evidence for promiscuity and pair-bonding in our species. Please see the Introduction here.

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“So be sure when you step, Step with care and great tact. And remember that life’s A Great Balancing Act.” – Dr. Seuss

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…………………………………………………………………………………………………………………………………………………………………. Varieties of Intimate Relationships. Click for larger image. (from Informationisbeautiful.net)

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David McCandless at “Information Is Beautiful” gave me permission to reproduce the above image. I though it fit well with the series I started months ago titled Humans are (blank)-ogamous, which looked at the evidence for pair-bonding and promiscuity in human evolution. In the first post of the series, I wrote:

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To begin, let me say that I side with Sapolsky. Individuals may figure out what works best for themselves in terms of balancing sex, love, intimacy, and commitment, but collectively we are a tragically confused species. …

Across the spectrum of human cultures, we can find examples of heterogamy, endogamy, polyandry, polygyny, monogamy, non-monogamy, polyamory, and so on. However, these do not all occur in equal frequencies, so I don’t think we are truly “blank-ogamous.” There is also lots of room for variation within each culture. Being good Popperians committed to the principle of falsifiability, it is probably easier to say what we are not than what we are. One thing is clear: we are not simple.”

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On the Odds of Your Existence

Last week I volunteered to read a story for my older son’s 3rd grade class. The book I selected was Dr. Seuss’ “Oh the Places You’ll Go” because I think it does a nice job of conveying the theme of perseverance in a kid-friendly way, which is the reason I read it often to my boys at home.

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Cosmically Connected Primates

“For small creatures such as we, the vastness is bearable only through love.”                 

– Carl Sagan, Contact

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Three different people have shared the inspirational video below with me in the past two days, and I thought it deserved to be disseminated as widely as possible. It’s the response of astrophysicist Neil deGrasse Tyson to the question: “what is the most astounding fact you know about the universe?” In his answer, Tyson elaborates on the majestic idea that the heavier elements crucial for organic life owe their origins to the incredible pressures created within aging stars. Those stars then exploded and released their newly forged contents into surrounding space, some of which eventually coalesced into us (to make a long story short).

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By itself, that concept is sublime, and it should be enough to sustain one’s sense of awe for a long while. But Tyson also goes a bit farther, speculating on why this idea elicits such an emotional response within us. 

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Empathy in Flux

“All is flux.” – Heraclitus

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“Before criticizing someone, you should walk a mile in their shoes. That way, when you do criticize them, you are a mile away… and you have their shoes.”      –Jack Handey

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Stop motion photo of a girl jumping rope. A few moments of an individual life. (Photo by Harold Edgerton).

My advisor in graduate school, Mike Little, once shared with the class that he fantasized about a machine that would provide instantaneous biological data just by having a person walk through it. As he described it, the machine would work something like an airport metal detector, only instead of revealing any concealed objects, it would assess the types of variables that biological anthropologists salivate over – anthropometrics, body composition, blood pressure, hormonal profiles, presence of infections, etc. If only…

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On Life, Death, and Shaking Hands with Your Ancestors

Appropriately, I’m writing this in the middle of Hurricane Irene.

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.A couple of days ago, NPR posted this quote on death by Steve Jobs. 

No one wants to die. Even people who want to go to heaven don’t want to die to get there. And yet death is the destination we all share. No one has ever escaped it. And that is as it should be, because Death is very likely the single best invention of Life. It is Life’s change agent. It clears out the old to make way for the new. Right now the new is you, but someday not too long from now, you will gradually become the old and be cleared away. Sorry to be so dramatic, but it is quite true.”

Direct ancestor/ descendants holding hands (my sons and I)

Digging a bit deeper, I was able to find that the quote came from a commencement speech Jobs gave at Stanford University in 2005, about a year after he was diagnosed with pancreatic cancer. By now, most people probably know that Mr. Jobs stepped down as CEO of Apple last week, and there has been speculation that this may tie into his past health issues. Such a close encounter with mortality would likely make any person pause and reflect on the big picture, and why it is that we ultimately share the same destination. I empathize deeply with Mr. Jobs, Christopher Hitchens, the people of Somalia and, well, everyone, since we must all one day confront the fact that our time here is finite. Death is the ultimate equalizer.

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Part 4. Humans are (Blank) -ogamous: Promiscuity & Physiology

This is the fourth part on the evolution of human mating behavior, comparing evidence for promiscuity and pair-bonding in our species. Please see the introduction here.

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We left off with a list of eight traits in humans suggesting promiscuity in humans. Admittedly, the previous post was a little thick, as it dealt with imprinted genes and population genetics. The current one concerns human reproductive physiological and anatomical traits consistent with a multiple-partner mating structure, building on a couple of points addressed by Ryan and Jethá in their book. If you’re paying attention, that’s three posts concerning promiscuity and one (yet-to-be-written) on pair-bonding. Perhaps it seems I’m stacking the deck, but please reserve judgment. One reason more space is needed to make the case for the evolution of promiscuity is that the biology is less well known, and more effort is needed to bring it into the light. That single post on pair-bonding will be an important one, and quality matters just as much as quantity.

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Continuing on with our list of traits hinting at promiscuity…

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9. Sexual dimorphism in body size. This point remains somewhat contentious. In the majority of anthropoid species (monkeys, apes, and humans), males are the larger sex, with the degree of dimorphism ranging from slight to extreme (Plavcan 2001). This pattern correlates strongly with mating structure and male-male competition (Plavcan and van Schaik 1997). For monogamous species like gibbons, males and females tend to be roughly the same size. In species where females prefer larger males or where males compete for access to females, bigger males will leave behind more descendants. This is true for polygynous gorillas and dispersed, territorial orangutans, where males are physically about twice as large as females. A good non-primate example is elephant seals. On the other hand are horseshoe crabs, where smaller males cling to the backs of larger females and wait for the release of her eggs. This ‘reverse dimorphism’ is found in a few primates, but is slight and only in some prosimians such as lorises and lemurs.

Former sumo wrestler Konishiki and his wife Chie Iijima, an obviously cherry-picked example of extreme dimorphism. (From smh.com.au).

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Part 2. Humans are (Blank) -ogamous: Promiscuity

This is the second part on the evolution of human mating behavior, comparing evidence for promiscuity and pair-bonding in our species. Please see the Introduction here.

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“I’ll be frank. True monogamy is rare. So rare that it is one of the most deviant behaviors in biology.” (Olivia Judson 2002: 153)

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In their best-selling book, Sex at Dawn, Chris Ryan and Cacilda Jethá suggest that there is a good amount of direct and circumstantial evidence that extended monogamy does not come easily for humans, and that this derives at least in part from our fairly promiscuous evolutionary history. (To clarify, they use the term ‘promiscuous’ not in a judgmental way, but merely to convey having multiple sex partners). Their main premise is that rigid monogamy became common only after our ancestors made the shift from hunting and gathering to agriculture. With agriculture came an emphasis on fixed settlements, private property that could be inherited, genetic paternity, and female sexual fidelity. They argue that this stands in contrast to our hunting-gathering past, when sexual relationships were more open and not confined to an exclusive pair-bond.

Bonobo sex. From Lola ya Bonobo

Bonobo sex. From Lola ya Bonobo

 

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