People say sometimes that Beauty is only superficial. That may be so. But at least it is not as superficial as Thought. To me, Beauty is the wonder of wonders. It is only shallow people who do not judge by appearances.From childhood, however, we have been exhorted not to judge people by their appearances. In Skin in the Game (August 2019), Nassim Nicholas Taleb advises choosing the surgeon who “doesn't look like a surgeon” because their success is more likely due to competence than first impressions. Despite this, physiognomy, assessing a person's characteristics from their appearance, is as natural to humans as breathing, and has been an instinctual part of human behaviour as old as our species. Thinkers and writers from Aristotle through the great novelists of the 19th century believed that an individual's character was reflected in, and could be inferred from their appearance, and crafted and described their characters accordingly. Jules Verne would often spend a paragraph describing the appearance of his characters and what that implied for their behaviour. Is physiognomy all nonsense, a pseudoscience like phrenology, which purported to predict mental characteristics by measuring bumps on the skull which were claimed indicate the development of “cerebral organs” with specific functions? Or, is there something to it, after all? Humans are a social species and, as such, have evolved to be exquisitely sensitive to signals sent by others of their kind, conveyed through subtle means such as a tone of voice, facial expression, or posture. Might we also be able to perceive and interpret messages which indicate properties such as honesty, intelligence, courage, impulsiveness, criminality, diligence, and more? Such an ability, if possible, would be advantageous to individuals in interacting with others and, contributing to success in reproducing and raising offspring, would be selected for by evolution. In this short book (or long essay—the text is just 85 pages), the author examines the evidence and concludes that there are legitimate correlations between appearance and behaviour, and that human instincts are picking up genuine signals which are useful in interacting with others. This seems perfectly plausible: the development of the human body and face are controlled by the genetic inheritance of the individual and modulated through the effects of hormones, and it is well-established that both genetics and hormones are correlated with a variety of behavioural traits. Let's consider a reasonably straightforward example. A study published in 2008 found a statistically significant correlation between the width of the face (cheekbone to cheekbone distance compared to brow to upper lip) and aggressiveness (measured by the number of penalty minutes received) among a sample of 90 ice hockey players. Now, a wide face is also known to correlate with a high testosterone level in males, and testosterone correlates with aggressiveness and selfishness. So, it shouldn't be surprising to find the wide face morphology correlated with the consequences of high-testosterone behaviour. In fact, testosterone and other hormone levels play a substantial part in many of the correlations between appearance and behaviour discussed by the author. Many people believe they can identify, with reasonable reliability, homosexuals just from their appearance: the term “gaydar” has come into use for this ability. In 2017, researchers trained an artificial intelligence program with a set of photographs of individuals with known sexual orientations and then tested the program on a set of more than 35,000 images. The program correctly identified the sexual orientation of men 81% of the time and women with 74% accuracy. Of course, appearance goes well beyond factors which are inherited or determined by hormones. Tattoos, body piercings, and other irreversible modifications of appearance correlate with low time preference, which correlates with low intelligence and the other characteristics of r-selected lifestyle. Choices of clothing indicate an individual's self-identification, although fashion trends change rapidly and differ from region to region, so misinterpretation is a risk. The author surveys a wide variety of characteristics including fat/thin body type, musculature, skin and hair, height, face shape, breast size in women, baldness and beards in men, eye spacing, tattoos, hair colour, facial symmetry, handedness, and finger length ratio, and presents citations to research, most published recently, supporting correlations between these aspects of appearance and behaviour. He cautions that while people may be good at sensing and interpreting these subtle signals among members of their own race, there are substantial and consistent differences between the races, and no inferences can be drawn from them, nor are members of one race generally able to read the signals from members of another. One gets the sense (although less strongly) that this is another field where advances in genetics and data science are piling up a mass of evidence which will roll over the stubborn defenders of the “blank slate” like a truth tsunami. And again, this is an area where people's instincts, honed by millennia of evolution, are still relied upon despite the scorn of “experts”. (So afraid were the authors of the Wikipedia page on physiognomy [retrieved 2019-12-16] of the “computer gaydar” paper mentioned above that they declined to cite the peer reviewed paper in the Journal of Personality and Social Psychology but instead linked to a BBC News piece which dismissed it as “dangerous” and “junk science”. Go on whistling, folks, as the wave draws near and begins to crest….) Is the case for physiognomy definitively made? I think not, and as I suspect the author would agree, there are many aspects of appearance and a multitude of personality traits, some of which may be significantly correlated and others not at all. Still, there is evidence for some linkage, and it appears to be growing as more work in the area (which is perilous to the careers of those who dare investigate it) accumulates. The scientific evidence, summarised here, seems to be, as so often happens, confirming the instincts honed over hundreds of generations by the inexorable process of evolution: you can form some conclusions just by observing people, and this information is useful in the competition which is life on Earth. Meanwhile, when choosing programmers for a project team, the one who shows up whose eyebrows almost meet their hairline, sporting a plastic baseball cap worn backward with the adjustment strap on the smallest peg, with a scraggly soybeard, pierced nose, and visible tattoos isn't likely to be my pick. She's probably a WordPress developer.
A certain segment of the dogma-based community of postmodern academics and their hangers-on seems to have no difficulty whatsoever believing that Darwinian evolution explains every aspect of the origin and diversification of life on Earth while, at the same time, denying that genetics—the mechanism which underlies evolution—plays any part in differentiating groups of humans. Doublethink is easy if you never think at all. Among those to whom evidence matters, here's a pretty astonishing fact to ponder. In the last four Olympic games prior to the publication of this book in the year 2000, there were thirty-two finalists in the men's 100-metre sprint. All thirty-two were of West African descent—a region which accounts for just 8% of the world's population. If finalists in this event were randomly chosen from the entire global population, the probability of this concentration occurring by chance is 0.0832 or about 8×10−36, which is significant at the level of more than twelve standard deviations. The hardest of results in the flintiest of sciences—null tests of conservation laws and the like—are rarely significant above 7 to 8 standard deviations.
Now one can certainly imagine any number of cultural and other non-genetic factors which predispose those with West African ancestry toward world-class performance in sprinting, but twelve standard deviations? The fact that running is something all humans do without being taught, and that training for running doesn't require any complicated or expensive equipment (as opposed to sports such as swimming, high-diving, rowing, or equestrian events), and that champions of West African ancestry hail from countries around the world, should suggest a genetic component to all but the most blinkered of blank slaters.
Taboo explores the reality of racial differences in performance in various sports, and the long and often sordid entangled histories of race and sports, including the tawdry story of race science and eugenics, over-reaction to which has made most discussion of human biodiversity, as the title of book says, taboo. The equally forbidden subject of inherent differences in male and female athletic performance is delved into as well, with a look at the hormone dripping “babes from Berlin” manufactured by the cruel and exploitive East German sports machine before the collapse of that dismal and unlamented tyranny.
Those who know some statistics will have no difficulty understanding what's going on here—the graph on page 255 tells the whole story. I wish the book had gone into a little more depth about the phenomenon of a slight shift in the mean performance of a group—much smaller than individual variation—causing a huge difference in the number of group members found in the extreme tail of a normal distribution. Another valuable, albeit speculative, insight is that if one supposes that there are genes which confer advantage to competitors in certain athletic events, then given the intense winnowing process world-class athletes pass through before they reach the starting line at the Olympics, it is plausible all of them at that level possess every favourable gene, and that the winner is determined by training, will to win, strategy, individual differences, and luck, just as one assumed before genetics got mixed up in the matter. It's just that if you don't have the genes (just as if your legs aren't long enough to be a runner), you don't get anywhere near that level of competition.
Unless research in these areas is suppressed due to an ill-considered political agenda, it is likely that the key genetic components of athletic performance will be identified in the next couple of decades. Will this mean that world-class athletic competition can be replaced by DNA tests? Of course not—it's just that one factor in the feedback loop of genetic endowment, cultural reinforcement of activities in which group members excel, and the individual striving for excellence which makes competitors into champions will be better understood.