Modern Wisdom - #960 - Dr Jerry Coyne - The Spiciest Ideas Of Evolutionary Biology

Episode Date: June 28, 2025

Dr Jerry Coyne is an evolutionary biologist, professor at the University of Chicago, and an author. Has ideology hijacked academia? In fields like evolutionary biology, the data should speak for itself, but what happens when scientific findings clash with cultural taboos? How do researchers navigate this minefield, and what can be done to protect science from political pressure moving forward? Expect to learn how Dr Coyne views evolution from a different lens, how biologists view biological sex and gender, why science communicators became too afraid of backlash to speak plainly about data, what worries Dr Coyne most about the ideological pressures in academia today, if biology has been subverted by ideology, what Dr Coyne has learned about human nature from engaging with critics of his work, & much more… Sponsors: See discounts for all the products I use and recommend: https://chriswillx.com/deals Get up to $50 off the RP Hypertrophy App at https://rpstrength.com/modernwisdom Get 15% off any Saily data plan at https://saily.com/modernwisdom Get 5 Free Travel Packs, Free Liquid Vitamin D, and more from AG1 at https://ag1.info/modernwisdom Timestamps: (00:00) Dr. Coyne’s Take On Evolution (15:34) The Impact Of Woke Culture On The Sciences (26:36) How Humans Developed Into The Conscious Animals We Are Today (35:08) Why Human Adaptations Vary Around The World (48:03) Sex, Gender & What The Science Actually Says (1:04:55) How To Deal With Controversial Topics In Science (1:16:07) Learn More About Dr Coyne Extra Stuff: Get my free reading list of 100 books to read before you die: https://chriswillx.com/books Try my productivity energy drink Neutonic: https://neutonic.com/modernwisdom Episodes You Might Enjoy: #577 - David Goggins - This Is How To Master Your Life: https://tinyurl.com/43hv6y59 #712 - Dr Jordan Peterson - How To Destroy Your Negative Beliefs: https://tinyurl.com/2rtz7avf #700 - Dr Andrew Huberman - The Secret Tools To Hack Your Brain: https://tinyurl.com/3ccn5vkp - Get In Touch: Instagram: https://www.instagram.com/chriswillx Twitter: https://www.twitter.com/chriswillx YouTube: https://www.youtube.com/modernwisdompodcast Email: https://chriswillx.com/contact - Learn more about your ad choices. Visit megaphone.fm/adchoices

How do you describe the central thread of your work over the years? Well, I'm retired now, so the thread has sort of changed direction. But when I was a scientist, I call myself a superannuated scientist now. But when I was working in the lab, I worked on the problem of speciation or the origin of species, which is of course the title of Darwin's 1859 book, and it's a problem that Darwin didn't solve.

So that's why I took it up when I was a graduate student. I think we know a lot more now. We certainly, Darwin knew almost nothing about speciation. So to call his book, the origin of species is a bit of a misnomer. He could call it the origin of adaptations, which might be a natural selection. But in terms of species, that is the lumpiness of nature. The fact that creatures are not a spectrum, but they're discreet, more or less discreet entities.

That's a problem with Darwin to solve. And that's the problem I was working on. Right. How do you, what's the layman's description of speciation? Well, are you talking about how it happens or how I define it? Give us both. Well, the definition is simply the speciation is the origin of a species. If you look at nature, as I said, you don't find that it's a continuum all

the way from bacteria to, you know, humans. If that's not a hierarchy, that's just what people perceive as a hierarchy. It's lumpy. So if you look at a bird out your window, you're going to know what it is. And so you're not going to say, I don't know. It looks like a half black bird and a half Robin or whatever. No, they come in pretty discrete packages. And that is the problem of speciation.

What on earth would make a continuous evolutionary process give rise to entities that are absolutely discontinuous? And that's really the problem of the origin of species. Right. Darwin made almost no end roads on it whatsoever. Why was it a difficult circle to square for him? Well, because in order to attack the problem with speciation, you have to know what species are.

And although we say nature is lumpy and these lumps are species, that's not really the problem. The question is, well, why do we get those lumps? And it was in about the 1930s that people realized that those lumps are kept separate by what we call reproductive isolated barriers. That is, barriers that keep the genes from one species from mixing with those of our other species. For example, those barriers could be that the hybrids are sterile or inviolable. So even if they make, you don't get any intermixing or they couldn't like each other. I mean, like a lion and a tiger, they'll mate in the zoo and produce things like

lagers or Tiglons, which they'll have. But where they co-occur, where they used to co-occur and say the gear force of india they don't have a break. Add in nature there's a lot of animals that just simply don't like the way they look like the mating behavior of the species like the pheromones of the other species. Order a case of plants they produce pollin eggs at different times. That's called temporal isolation. So there's all these barriers that keep numbers of different species apart. Now that immediately raises the problem that you want to solve, which is how do these barriers come about to keep species separate in a continuous sublutrient process? So that's what I was working on. I guess the, uh, Batman to your Bruce Wayne of, uh, work over the years has been.

Advocating for evolutionary views, advocating for the evolutionary method overall, that this is something that is true and that people should believe in pushing back against anti evolutionary positions. Is that a fair assessment? Yeah, I spent a lot of my time, particularly when I was younger, arguing against creationists and creationism. And it finally resulted in me having to write a book about it called Why Evolution is True. Because when I taught my first evolution course, which was probably in about 1983, back in the place to see,

the first thing any professor does when he or she writes a course is to say, well, you pick up the textbook that's relevant to the course and you see how it's organized and you get ideas about how to write a course. But when I did that for evolution, I looked at the evolution textbooks and none of them had anything about the evidence for evolution in them. They just assumed that you assume that evolution was true and then you go into things like population genetics and species genetics, et cetera. But they left behind all the stuff that was so prominent in the textbooks of the 20s and 30s, why biologists believe evolution is true

and why it is a scientific fact, as we call it, provisional truth and not just a mere speculation. Is it interestingly ironic in some way that you're pretty well known for pushing back on right-wing anti-evolutionary views. And it was funny that in the past, left-wing people used to use evolution as a cudgel to beat their right-wing foes' cherished beliefs. And now the right uses it for the same reason against their left-wing foes to cudgel their

cherished belief. Like in politics, it seems like, I don't know, a fact functions as a weapon that's laid out in the open and either side can pick it up, but you've got, uh, religious evolution deniers on the right and evolutionary psychology deniers on the left. You've got these two groups both arguing, but also sometimes I guess, when it's convenient, certain members of certain groups using it to hit each other over their head with

Yeah, I mean there are well evolutionary psychology is really only the It's the purview of the right-wing cudgels But in general if you look at right versus left at least in America, and I think that's probably true in the UK as well Far more people on the left accept evolution as a fact rather than the right. It's almost a touchstone of ignorance. And here I'm showing my political predilections,

but it's a touchstone of ignorance to deny that evolution is a scientific fact. And again, as fact, in science, we don't have anything as a fact that's beyond acceptance. We have things that are somewhat acceptable. And then we have things that are so widely accepted that you would bet your fortune on them, like the formula of water is H2O. And so there's various degrees of factoid. Um, but in general, the left accepts factoid more than right. But that in general, however, it's still both surprising and depressing how few

Americans accept that evolution is true. If you look at the latest Gallup poll, where they asked people just about the origin of humans, did humans evolve? Were they created by God in the biblical matter? Or did they sort of evolve, but God tweaked the pathway here and there, maybe putting in consciousness or rigged brain? And you find out that only about 23% of Americans accept the fully naturalistic view of evolution, the one that I teach, that it's purely a materialistic process without any supernatural intervention. And about 30% of Americans accept the fact that humans sort of evolved but God had a

hand in it now and then. And about 40% of Americans, by the biblical view, humans were created in seven days and haven't changed since then. And in fact, all creatures have. And so basically about 71% of Americans reject naturalistic evolution. So this is what we're up against. And those include, of course, both Democrats and Republicans, but the percentage is higher amongst the right. On the scale of betting your entire finances on H2O to something that's a

lot more spurious, where would you place evolutionary psychology as a field? Well, that's problematic. I mean, I started off being a sort of a foe of evolutionary psychology, because when it started off, there was a lot of just-so stories taught. People would look at a human behavior, they'd make up a reason, not the best ones. I mean, the way I gave advice to being cosmetics would approach it

scientifically and say, well, I'm not just going to make up a story, I'm going to make up a testable story and make to being cosmetics would, you know, approach it scientifically and say, well, you know, I'm not just going to make up a story. I'm going to make up a testable story and make predictions. So to assess the field as a whole, all I can say is it's becoming less of a storytelling field and more of a scientifically mature field in which they make predictions. So it still has its problems. For example, it's not nearly as well founded as say molecular evolutionary genetics is where you can sequence

the DNA and come to absolutely the conclusions that everybody can verify. Evolutionary psychology is the problem that if you're trying to explain a human behavior, like for example, this sort of step-parent effect that step-parents tend to kill their offspring or hurt them more than a natural born parent. How do you test that? If you make up a story, well, those people left more off. The step-parents that killed off or hurt or injured their stepchildren, left more offspring than those that didn't because they left more of their own children.

Well, how do you verify that? There are predictions that you can make over about test stories like that. I'm not really familiar with that, but my own way to test it would be the pet theory. That is, if you have your own pet when you get married, then you tend to treat it really good. But if you marry somebody and they've already have your own pet, it's the equivalent of a stepchild. So my prediction, which I don't think has been tested at all, is that you would treat the step pet a lot worse than you would treat your own pet if you got married. So we need to ring David, David, this is the next, this is your next piece of

work, put down the mating research. You don't need to do it. You don't need to be bothered with that. Yeah. Well, I wrote David not long ago. I've been on him for a long time about this to write a paper about testable predictions of evolutionary psychology, just to quiet down those people. Like for example, P.Z.

Myers, the bloggers, who said that evolutionary psychology is not even a reputable scientific field because it is. It's taking a, it's taking an awful lot of heat at the moment. I think it's very unpopular, left of center. It's this sort of blank slate-ism, this denial of meritocracy. You know, if you're in a world where you can make anything of yourself, you can become whatever you want to be. And if you pick yourself up by your bootstraps, it's the same reason that behavioral genetics is wholly unpopular.

It was a great study. I don't know whether you saw Corey Clark's thing. She sent an email survey to pretty much all of the psychology professors in the US asking them what are the topics that should be taught the least? What are the ones that require the most guardrails around shock, horror, evolutionary psychology, and behavioral genetics are kind of the two horsemen of the apocalypse when it comes to that. But you know, back in the past, there was the just so story horsemen of the apocalypse when it comes to that.

Um, but you know, back in the past, there was the just so story paper, right? There was an actual paper that was around that and, uh, David's grad student, uh, William is currently in his lab. They have a paper in press at American psychologist called evolutionary hypotheses are testable and falsifiable. So, but I didn't know it would have been accepted for publication. So I was really glad to see that because it's time that people realized that the field has reached a stage of explanatory maturity and yeah, you're absolutely right. And it's supposed by the left because it puts limits on the malleability of behavior, both of humans and of animals.

And that's explicitly anti-Marxist and it's anti-Leftist, but that's, that really is a reason. That's one reason why ideology is beginning to erode away certain areas of science. Evolutionary psychology is one of those areas. Hmm. Yeah. It's that this sort of a duality of what's going on. I'm aware maybe EP has only recently got to, how would you say, testable and falsifiability escape velocity, or, you know, the, the, uh, level with which you would consider it to be, you know, you're, you're part of the real sciences now. Um, but still there is this odd duality, this it to be, you know, you're part of the real sciences now.

But still there is this odd duality, this sort of symmetry going on. The right had an issue with an area of evolution because it killed one of their sacred cows. The left has an issue with an area of evolution because it's killed one of their sacred cows as well. And yeah, it's, I don't know, I found that really, really interesting to think about when looking through your work. Yeah, that's Luana Muroja, my Brazilian colleague, and I wrote a paper called The Ideological Erosion of Biology, in which we take six areas of our own field, evolutionary biology, and show how they have been misrepresented by the mainstream media, by other scientists, by almost everybody in the interest of ideology. One of those was that human behavior, evolutionary

psychology is a worthless field. We show that, no, it makes a lot of predictions and a lot of explanations. Another one which is related to that is that men and women are different not because of any evolutionary differences in our ancestry, but because of how they're socialized. That's another pernicious guideline. Yeah, there is socialization, but men and women are different to a large degree because of evolution.

Men are more risk-taking, they're less choosy in terms of mates, they show more sexual jealousy. I mean, there's any number of behavioral differences between the sexes that are not only understood and predictable from evolution, but they're seen in other species. Our closest relatives, the great apes, show many behaviors that we have. Males are larger than females, males are more warlike, etc., etc., etc. So, you know, that's another... I mean, it's a shame these days that ideology is infecting science so much. And it's not just biology, it's in physics, even math.

We have like progressive math now. What does progressive math consist of? Well, it's basically using examples that are, thatiates a equity or something like that. You know, it hasn't affected really mathematics so much, except that there's one area in which people say that two plus two can equal five if you want it to. That's part of the sort of science that's been affected by postmodernism in which each person has their own truth. And there's no absolute truth, but just a warring of powers. And the two plus two with five is sort of the exemplar of that. People have made arguments that, yeah, you can

say that if you think about it the right way. But math has been less infected than biology because it's a self-contained system of axioms and deductions and stuff. But chemistry has, physics has, I mean, the word black hole is now. It's just like, like a brown bag lunch. You can't say that anymore to refer to your paper bag lunch because it's thought to be racist. You can't say that anymore to refer to your paper bag lunch because it's thought to be racist. I saw there was a de-gendering, de-masculinizing of different terms and one of them, manhole.

That was up for the chop. Yep. Yeah. There's any number of terms that you can't use and I just, thank goodness I don't teach anymore because I know that I would say something that would get me in trouble. It would just blur it out because almost anything could get you in trouble these days. Yeah. I guess it depends where you teach and I would also guess that if someone's doing evolutionary biology now, you know, with the field being a bit more mature, especially if you're in an EP class and

you're saying this is very judgmental, what, so you're saying that men are stronger than women, it's like, what are you doing? What are you doing taking this course? Why are you taking this course? Right. Like if you're going to come in and debate the fundamental foundation, which is you can see MRI scans of in utero developing babies after three months can tell sex differences in the brain, right? And an fMRI is able to detect at age 10 with 90%

accuracy, the difference between a boy's brain and a girl's brain. By the way, that's about the same accuracy that humans have of detecting the difference between a man and a woman by looking at their face. So it's the same level of accuracy-ish. And this is all just socialization? How many times do we need to like rid us of, like wipe this slime off of us? Well, I think, I mean, at least this is a suggestion that why the Democrats didn't do well in the last presidential election. This kind of, we call it wokeness.

I'm anti-woke and yet I'm a left-winger. I'm a classic Democrat, sort of liberal towards the center, but still on the left. And yet I can see our own party sabotaging itself by insisting, for example, that there is not two sexes or that there's no differences between males and females that aren't due to socialization. And anybody with two neurons to rub together knows it. This episode is brought to you by the RP hypertrophy app. This app has made a massive impact on my gains and enjoyment in going to the gym

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You know, Steve Stewart Williams. Do you know who that is? Yes, I do. He's in Southeast Asia. Singapore, maybe University of Singapore, Twinned with Nottingham. Obviously the University of Singapore Twinned with Nottingham. His new book, I think, I can't remember the working title.

He's changed the title like five times, but his new book is all about sex differences. And it's not out. I think he's currently, it's not out. I think he's currently, it's still in process, which is hence why he hasn't decided on a, on a title. So you mentioned that you did this paper. I also saw a talk of yours, uh, where you attempted to juggle at least a couple of hot potatoes, uh, with regards to biology, what are the areas of evolutionary theory and biology

that ideology has come in and tried to pervert the most? Well, there were six. I mean, the two hardest potatoes were, and I'll give the sentences that people say that are wrong, very ideological and motivated. There are more than two sexes. That sex is a spectrum and not binary. That's one of them. The other one is that race, and this comes straight out of I think the American Medical Journal, but

it could have been the Lancet, which is also way well done, that race is a human construct without any scientific basis whatsoever. That's two of them. Males and females are not biologically different from one another. That's another third misguided statement. That indigenous science, that is the so-called way of knowing of indigenous people like the Maori and New Zealand is Just as good as modern science That's another one

That People don't differ from one another in any meaningful genetic ways But the differences between you see between people not the way they they look. Cause you obviously that's, that's the genetic basis, but the way they behave is not a genetic basis. I'm not, I can't remember the sixth one, but that's. Oh wow. So I didn't know that behavioral genetics had snuck in. Oh yeah.

So, all right. Okay. Right. This really is like the six, the, uh, I don't know, six horsemen of the apocalypse this time. Yeah. I mean, there's whole, the way we express behavioral genetics is a term called heritability, which is basically the proportion of a given behavior across members of a population that's due to differences in their genes. So for example, there's a heritability of, um, smoking.

I mean, almost every human behavior has a non zero genetic component to it. And most of the interesting ones have hereditary abilities of about 50%. This is explicitly denied by the very same people who deny evolutionary psychology. And for the same reason, because it implies that humans are not infinitely malleable, but are constrained by their genes. Yeah. Those constraints brush up against a lot of what people want to believe, I think, this sense of freedom,

this sense of autonomy. I understand. I got into evolutionary theory through Robert Wright's book from 1993, 1992, The Moral Animal, and I read this only seven or eight years ago. And some stuff has a little, looks a little silly in retrospect, but it still holds up so well. 30 years later, that book is still fucking fantastic. I love it. And, you know, I started to see, huh, there's reasons for my behavior.

Like this isn't just some weird personal curse of mine or blessing or whatever, but it's adaptive and there's a reason for it. And there's proximate and ultimate reasons for why we do things. There's the reason why you do it and there's the reason to do the thing. And there's a difference between those two. You have sex because it feels good. The reason that you to do it is so that you make babies so that you keep, I'm like, huh, I'm kind of being puppeted by my genes, isn't this interesting?

Uh, but yeah, to consider that race and ethnicity are social constructs without biological meaning and to get that published in JAMA, to have that sentence published in JAMA. I didn't realize that race or populations and ethnic groups were now socially constructed. It's like, did black people just spend more time in the sun? Like what, where do you think that's come from? Well, you know, the people that say that it's socially constructed, I don't think they really know what they're saying because clearly there are biological differences between different human groups. Now using the word race is what gets you in trouble because it implies A, you're racist

and B, the old view of race, which was promulgated by some racist biologists, which is that there is a finite, well-demarcated number of human groups that are genetically quite dissentful. That's not right. That's not right. So they were almost using a speciation argument with ethnic groups. Right. Oh, this is all of your chickens come home to roost at once. This is all of your chickens come home to roost at once. Well, but the fact is, you know, I mean, in my paper that I talked about, um, there's many, many bits of evidence that there are biological differences between human groups.

And granted, there are in general more genetic differences within what we call a race and I'm going to use the word race. I mean, I usually say ethnicity to avoid getting in trouble because the races are not well defined and they're sort of admixt along the edges and stuff. But nevertheless, if you take, well, the example I like to use is if you take a group of Americans and you ask them to self-identify themselves as to race. So, it's what they say their races are. And they're black, white, East Asian, Native Americans, and Hispanic, just like five of them. And you ask everybody to define their race that way.

And then you look at their DNA and you give all the DNA to the scientists and you're not telling where it came from, which individual it came from, and you'll see there are folds in the clusters and it happens to be about five clusters. And the co-reference between the genetic position in a cluster and the self-defined race of an individual is about 99.9%. If you have somebody's genome, you can basically... This is why 23andMe works so well and tells you what your ancestry is. People wouldn't do it if it wasn't at least some degree accurate.

That shows you right off the bat that there are genetic differences between human groups. And it arises the same way speciation arises. People in isolation in the early human ancestry did not exchange genes so much, so they evolved in different directions. And that's why, A, we have species because an animal can evolve in different directions to such an extent that it can't interbreed if it were to come back together with it again. And human populations or human races were on that same path.

I was going to say how long, so we split off from the African Plains how long ago, 30,000 years ago, 40,000 years ago? People usually give the day of about 50,000, 60,000 years ago was the big migration out of your, out of Africa that spread throughout the world. We're actually fairly young. That's right. How long do you, how long do you think that would have had to have kept going for without re-globalization for speciation to have occurred within humans?

Question. I have a book too, Speciation to have occurred within humans. Well, I have a question. I have a book too called Speciation, which is what I wrote as my technical book, my real first book. I'm not smart enough to understand that one, so I'll get you to explain it to me. My friends want to say, oh, you read this book, it's so great, can I read it? I say, no, you don't want to read it, it's for graduate students. They buy it anyway, pay 50 bucks, and they say, I can't understand it. But it was an attempt and I think a very good attempt because nobody's ever tried to duplicate

it to explain what we know about how species come about and how they're defined and stuff. I can't remember, oh, how long would it take you, you're asking. And so, well, we don't know in primates. Well, I mean, we know that chimpanzees and humans, which are definitely two different species, but we know that because the experiment has been done of interbreeding them without success, they're about seven, eight million years separate. So we know that at least at the outside, that's where it takes to make a species in primates. We were only 60,000 years separated. So I mean that's only two

figures. It varies. We did a study in fruit flies or saw flies saying how long it takes to make the species if they're separated and it's something like one to two million years. So is it it surely it's not based on time it would be based on generations right because the mechanism that this is working on is genetic mutation. I have to imagine. Yeah. But there's the thing called the molecular clock, which runs on absolute time, not generation time.

And so you can, I've never heard of this. What is it? Yeah. So the molecular clock is a way of calibrating how old a pair of species is by looking at the differences in their DNA. And it turns out, for reasons that I won't go into because they're rather arcane, that the clock ticks with absolute timing, not generation time. And it has to do with neutral mutation rates and population size and stuff. But anyway, you can get a pretty

accurate estimate of how old two species are by simply looking at the divergence between their DNA. So what we did was take Drosophila in all stages of speciation, different populations, species that could still interbreed but didn't like to, and then fully isolated species that couldn't produce hybrids. And we looked at the genetic differences between those groups. And that way we could get a curve of reproductive isolation over time. Nobody had ever done that before because the data didn't exist for any group except for fruit flies. And

it's still my most cited paper. Congratulations. The conclusion was that if you're geographically isolated, it's about a million, two million years until you get to the point. We had, we had bags of time. We could have spent ages bringing the modern world around and we would have still been okay.

Do we know if the offspring of homo sapiens and Neanderthals, if those two mated, do we know if they were viable? Not only were they viable, they were fertile. And we know that because we all carry, well, not all of us, but most of us carry Neanderthal genes. Right. Of course. Mates that are Homo sapiens, sapiens and Homo sapiens, Neanderthal ancestors. I consider them the same species, although there's a big argument about it. I consider them the same species because they mated with each other and some of the genes of those

harbors got back into homo sapiens sapiens and we carry them around. And that is an evolutionary remnant of the fact that yes, we interbred with them. If Neanderthals were still around, I have little doubt that they would be carrying genes from homo sapiens and sapiens. And an evolutionary artifact of the fact that people like to have sex. And if it looks about right, we'll probably make it work. probably make it work. Am I right in saying that the last remaining non-homo sapiens species, genotype, phenotype, whatever the word is for that, was it those pygmy, the really small homo-

Oh, homo- homo-fluoresiens. Yeah, in Indonesia? Yeah. Is that, because that was 12, that was onlyoresiensis. Yeah, in Indonesia? Yeah. Is that, because that was 12, that was only 12,000 years ago, right? Ish? Well, it's called the different species, which implies that it could not mate with...

And there was Homo sapiens, sapiens around it too. These Homo sapiens floresiensis were about this big or so. They're like three feet tall. Amazing, that's what they call them. I can't remember what they call them. That's human pygmies or something. They're called the different species on one basis only, which is that they're tiny and they look different. We don't know enough about them to know if they really are a different biological species. Do you know, do you know this, do you know the story of why they grew to be so small? Okay.

So I'm going to get into real just so territory here. Okay. But allow me, allow me to pontificate. Um, so the proposed mechanism, as far as I'm aware that the homo floresiensis. Uh, floresiensis. I'll let you do the technical language. I'll do the bro signs. The reason that they grew to be so small, if you look at the shape of Indonesia,

very, very small islands. So you have this sort of Galapagos effect thing going on where you can quite easily be segmented off from a mainland. quite easily be segmented off from a mainland. And what it seems like is that a group of Homo ancestors was separated off onto an island that had really, really sparse resources. So you kind of had this Malthusian-y type issue, upper bound, which means that if there's not many resources, not many calories available, the people who need the fewest calories are going to be the ones that survive. But the funny thing about this story

is that that effect obviously occurred across every animal. So apparently there are bones of miniaturized elephants also on this same island. So if you were able to go back 12,000 years ago, you would see miniature versions of humans running around with tiny little spears, chasing miniature versions of elephants running away with tiny little trunks. Well, it is true that in general, if a large species invades a distant island that doesn't have a lot of resources, It will evolutionarily shrink. We have pygmy elephants in the Mediterranean, by the way, remnants of them.

Um, I guess they could swim back then. And, and, but there are exceptions like the Galapagos tortoise, which is small in South America, its ancestor, but it got to the Galapagos and well, the reason it probably got big is that there was actually a plethora of resources, lots of vegetation, no competitors, no herbivores. So it's big. Let's go to town. Yeah. So you could get either big or small, but in general, evolutionists tend to observe

that animals that are large on the mainland, they're confined to a small resource-based space, tend to get smaller. So, but I don't know if that applies to humans. animals that are large on the mainland, they're confined to a small resource workspace, tend to get smaller. So, but I don't know if that applies to humans. I mean, I want to flurries answers because we have so few specimens. We don't have a whole skeleton or anything, just a couple of maybe finger bones or something.

We don't really know much about them. Except excuse me, they were tiny and they have a four-size replica in this Smithsonian. It was so amazingly small that I had somebody photograph me standing next to a camera about my waist and that's an adult. So that's one of the many mysteries of human evolution and there's more to come because specimens are hard to come by. Before we continue, getting mobile data while traveling is still way harder than it should be. Public Wi-Fi is sketchy, roaming charges are the worst and buying SIM cards in a foreign language after a 12-hour flight is about as fun as playing with a dead moth.

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And if you haven't activated your data plan or installed the eSIM, Saley offers a full refund within 30 days. No questions asked. Right now you can get 15% off any data plan by going to eSIM. SAIL offers a full refund within 30 days, no questions asked. Right now you can get 15% off any data plan by going to the link in the description below or heading to saili.com slash modern wisdom and using the code of modern wisdom. A checkout that's saily.com slash modern wisdom and modern wisdom. A checkout. When it comes to ethnic groups, have you looked at why it is Asians, East Asians, Africans, Caucasians? What is the reason for the main differences that we see either in the way that they present in the sort of shape, I don't know whether that's called morphology or whatever, the shape of their bodies. Do you know the adaptive explanation for why different groups

became that way? Well, for some traits, yeah, we think so. I mean, the most obvious one is skin pigmentation because you can draw a map of the world and look at the average degree of pigmentation. And you can see that in the hottest areas or the sunniest areas, you get darker skin, which is probably a protection against melanoma. And the other side of the corner is, well, why do you get light skin when you leave that area? Because you can still get melanomas from the sun. That's because you want to get vitamin D from the sun and you don't have to worry about, you know,

but the importance of getting vitamin D is more important than getting melanomas when you're in an area where there's not so much sun. So that's the explanation. That's just one trait though. There are many, many differences between, you know, most of the shape of the hair, whether it's curly or straight, eye color.

Are those adaptive? Is green eyes adaptive compared with brown? No idea. I mean- Good, see? For all of the people that say evolutionary scientists, they never say, I don't know. Here we are, evolutionary scientists saying, I don't know.

Well, there'll be a pretty pathetic scientist that never met an ignorance when he or she didn't. Now the answer, there's a lot of saying I don't know. Well, it will be a pretty pathetic scientist that never met an ignorance when he or she did. That's the answer. There's a lot of things we don't, I mean, physicists, why is there dark matter, you know, and dark energy that they have to say they don't know. Um, is strength theory right? We don't know. Um, you know, but there are some traits that we do know. For example, the Tibetans have a genetic basis to hang on to oxygen more in their hemoglobin.

And clearly that's adaptive because they live in an oxygen-poor environment. So that's a trait where we know. And there's probably about a dozen traits where we, but they're not the kind of things that interest people. We wanna know why people have curly hair. Or another one that's probably true is that people who live in cold climates like the Inuits in Alaska or Canada tend to be short and stocky.

And that's a general rule in the animal kingdom because limbs and protruding parts tend to be heat reservoirs, giving off heat. So you don't want to have long arms or you want to have a short stocky body to prevent heat loss. So that's probably another trait for, which we think is probably due to natural selection

because it's also true in other animals. I mean, I think it's called Alan's rule, that's what it is, that as you go to a colder climates, the protruding parts, which include the ears of jackrabbits. I mean, if you look at an arctic rabbit, it's ears like this. If you look at a jackrabbit in the desert where they need to radiate heat, their ears are huge. So that's an example. And it's probably a case in humans as well. But you know, with things like hair color, eye color,

I can't remember the politically correct word for the, oh, the sun, thing means, they used to be called the sun and the Bushmen. Why they're small. I'm not sure. I mean, they live in a hard environment, but they're small and we don't know the explanation for that. It would be hard to test that. So I, uh, I was told the other day, this may be a just so story.

Again, I've got my bro signs cap on, um, the reason that Irish and Scottish and English people get rosacea. So rosacea, this sort of ruddy cheeks, reddening of the face is the next step up in vitamin D production. So it's even, it's kind of beyond pale. So if you go from dark skinned to light skinned to slightly red skinned, it's a, uh, suppose I think, um, an indication that your body is able to generate its own vitamin D more effectively. And this comes from shock horror, a place that I'm, I was born in, uh, which is pretty dark a lot of the time, uh, pretty low on sunlight, a lot of cloud cover, a lot of rain, et cetera.

And, uh, yeah, that was the, the proposed explanation for that, that a friend told me about a couple of weeks ago. Well, I would look into that. It sounds a bit dubious to me because it would lead to the prediction that, for example, the Inuit or the Siberians would all have rosacea because they live. They're going to be in darkness for three months of the year. Yeah, that's true.

Well, I just never heard that before. My explanation would be that they drink too much. No, well, either might work. That's a sad choice. But it is true that people that drink a lot tend to have their capillaries broken in their faces. Now I've never heard that one before. Going back to the state of academia, do you think science communicators have become too afraid of backlash to speak

sort of plainly about their subject areas and data as well? What's the state of it now? Absolutely. I mean, there's self-censorship all over the media. One example of that, I suppose, is that, and this is in the UK, I think that guy who was in Liverpool, who drove his van into a crowd identified in the Times. I think it was in the telegraph. I call it the Tory graph.

He was identified as a 52 year old white man, but the British newspapers never give ethnicity when they give a suspect. Now, why does, why is that? Even if the person is on the lam, as a mid-cut, they're not going to say, well, this is a black man or this is a Hispanic man or whatever, because it's considered racist to do that. And so that's the most obvious example of how the media has been censored, self-censored. Also, if you read in the New York Times, you'll see that the word white is in small letters when describing some of your ethnicity and black is in the capital B, which is a way of valorizing a minority group.

I find that sort of inconsistent. The Washington Post, by the way, uses, I think it's either big letters for both or small letters for both. Either way, it should be consistent. So these are just the most obvious things that stand out. I don't think that answers your question though. I think you're asking more about science than journalism or? I honestly don't mind at all.

One thing that I want to bring in here. Do you know what gamma bias is? No. So good. So this is Dr. John Barry from the Center for Male Psychology. So there's alpha bias, which is exaggerating or magnifying gender differences. There's beta bias, which is ignoring or minimizing gender differences. And then there's gamma bias, which is a combination of the two, but it's sext.

So if a female is in active mode and does good, then it's a celebration. If a male is in active mode and does harm, then it's perpetration. So for instance, if domestic violence happens against women, it's highlighted as a gender issue. If domestic violence happens against men, it's played down or completely ignored. Men make up the majority victims of suicide. The issues aren't highlighted or portrayed as gender issues. So there's the minimization of gender if men are the victims and there's the minimization, there's the maximization of gender if men are the perpetrators. There's the maximization of gender if women are the successful perpetrators, if they're

doing good. And there's the minimization of gender if women are the perpetrators and they're doing harm. It's like an interesting dynamic. We call that virtue signaling. If you do that, it stamps you as a good person, basically. And there's no penalty to being pro-male. I mean, sorry, there's no advantage to being pro-male because you're just seen as a sexist.

And you don't even have to be pro-male, I mean, sorry, there's no advantage to being pro-male because you're just seen as a sexist and you don't even have to be pro-male. There's a penalty to telling the truth, which is the point of our paper. There's a penalty to saying that race doesn't exist. There's especially a penalty to saying that there's only two sexes in humans. People have lost their jobs for saying that. A guy wore a, there are only two, this was a kid in probably about 15 or 16 in American high school, it was just last week.

He wore a shirt to school that said there are only two sexes and he was, he was asked to go home. And they told him to pick up his father. Well, you know, at the same school, you can wear a gay pride shirt, which is I think just about school, you can wear a gay pride shirt, which is I think just about as, well, first of all, that there are only two sections is a statement of biological fact.

Gay pride is more of an ideological position. I'm in favor of it, but it's okay to wear a gay pride shirt. It's not okay to wear a shirt that gives a biological truth because that truth is invidious. Yeah. It's invidious because it implies that there's something wrong with people who feel that they're not a member of their natal sex. Yeah.

It's just the biological fact that keeps saying this over and over again. Sex with people recognize that there are males and females years before we even identified chromosomes. Every animal and every plant, vascular plant has just two sexes, the male sex and the female sex. And sometimes you have them both in one individual, but the reproductive systems are still, there's only two. Produced in one, a large immobile gamete, which is female, a

small mobile gamete, which is male. But if you say that, you get in big trouble. And I got in big trouble because I was working for, I was on the honorary board of the Freedom from Religion Foundation, which is an organization with a good mission to keep religion and government separate in the United States. That's our First Amendment. They worked hard to do that, but one of their members decided that she, I guess it would be a they because this person, and then Kat Grant called them,

considers herself to be of both sexes. Anyway, she wrote a piece in that newsletter of that organization saying, what is a woman? That's the title of it. And she goes through all these things about, well, you can't use this and you can't use that. And in the end, what is a woman?

A woman is whoever feels that she's a woman. Okay. It's a psychological thing, not a biological thing. Well, it's like saying, I feel like I'm a horse today. So you got to call me a horse. You know, that's a bit of an exaggeration, but not too far of an exaggeration. Anyway, that offended me as a biologist. I was on the own with directors,

and so I asked permission to rebut it. And they said, okay, you can write something. So I wrote a thing saying, this is the biological definition of sex. It doesn't have any implications for the moral or legal rights of people who feel that they're not firmly embedded in one of the two sexes. You know, they have different genders. And a woman is an adult human female that produces, or has the ability or the equipment to produce eggs. And they published that. And it disappeared within a day. Then you tell me they took that down because they considered it offensive. That's the state of biological.

I'm kind of torn, right? I on the show have spoken about a variety of topics pertaining to evolution, behavioral genetics, psychology, sex differences. And I kind of like, it feels a little bit like a high wire walking, right? To sort of do play the game appropriately to be able to get across what you mean, but to not step on too many landmines that cause you to get completely blown up. Maybe you could lose a toe, but that's, that's an acceptable cost of war or whatever. But even I find myself, you know, when we start

talking about like, what is a woman? You know, the, the question that, uh, often gets put against people that think gender, sex is a social construct. They say gender is a social construct, but they push it into sex as well. And even I find myself going like, I, I know that it's a useful rhetorical tool. I know it might even be a useful biological teaching tool to ask this question, to sort of allow people, encourage people to arrive at this sort of non sequitur recursive loop

thing that they're in. But I find myself going like, I really want to use that because it's, it's sort of become so captured by a group of people who really want to use it again as a cudgel to sort of beat down and, and creep out what it is that they mean. They don't just mean this. They mean, and what are your beliefs about marriage and what are your beliefs about reproduction and what are your beliefs? You know, it sort of starts to get into this kind of icky world because of the way that mean this, they mean, and what are your beliefs about marriage and what are your beliefs about reproduction and what are your beliefs?

You know, it sort of starts to get into this kind of icky world because good arguments are very, very good. The, the, the like, uh, evolution of the meme, I suppose, but this is like an academic meme or an intellectually useful meme and it propagates. And I find myself, I'm like, well, how having this conversation in a way that is persuasive, that is accurate, that is, I don't want to say the word sensitive, but speaks to the cultural temperature in a manner that allows people to get on board without getting their defenses up to, you know, I find myself tiptoeing through this in a little bit of a way.

Uh, for instance, if I ever want to talk about the issues that are facing boys and men, there's this weird social land acknowledgement that I need to do beforehand where I say, well, we must remember that women have had it, women and girls have had it bad for a long time and I'm not minimizing the issues that are facing. We must remember that women and girls have had it bad for a long time, and I'm not minimizing the issues that are faced. We must remember that domestic violence, what about the subjects of gender pay? After I've done this thing,

I've prostrated myself. Speak the truth. Now I'm allowed to actually say the thing that I wanted to say. Unfortunately, there's no disclaimer. Research peptides and stuff that people can buy on the internet. It's like, these are not for human use or like this website is for entertainment purposes only, whatever. There's like one disclaimer that sits there.

Unfortunately, in the world of communication on the internet, like this kind of communication, you need to do that disclaimer every single time. You're like an Australian plane coming into land that every time you land, the first thing you say, we must remember that we're here on the ground of the heebie-jeebie tribe, that this was ancestral land and blah, blah, blah. But it needs to happen every single time. And I, especially around the, in the conversation around men and boys, disparities, socioeconomic status, men and boys falling behind,

suicidality, domestic violence, all of this stuff. It really gets to me because I'm like, for fuck's sake, like, have I got to do this weird rain dance? I've got to like wave sage around myself in order to. That's what you're doing. Um, my answer would be no, you don't have to do that. All you have to do is be civil and speak the truth. I mean, the whole purpose of college in America, at least, as stated by the

American Association of University Professors, is to allow people to have disagreements about factual matters without feeling offended by them. So, a long time ago, with one exception I'll mention, I've given up putting these disclaimers in about, in my paper that I wrote about these things. I will put in a disclaimer, for example, when I'm talking about the two sexes, I will say, well, just because there are two sexes doesn't mean that people that feel that they're male when they're biologically female, there's something wrong with them. Okay.

It's important to show that what I call the reverse naturalistic fallacy, that nature is what you want it to be, is wrong. But every time you, now these disclaimers, you're sort of buying into that mindset that, yeah, you know, I have to satisfy the other side before I can speak the truth. And so I, you know, I've just given that up more or less. And the way I deal with that is just to be civil and polite and, you know, not heated because the whole point is to, to have a difference of opinion and try to persuade the other person

if you think you're right of your viewpoint. I used to do that on my website. I would cite a paper like The Telegraph, which is I think considered right-wing in England, although not as right-wing as it would be in America, or the Daily News in America, the equivalent of the Wall Street Journal opinion section, right, Wayne? And I would say, well, you know, this comes from their Wall Street Journal op-eds, but it speaks the truth anyway. And then I really just flying into that mentality that you have to qualify the

truth if it's said by the wrong people. Yeah. Wow. And you've called that the reverse naturalistic fallacy. The reverse naturalistic fallacy, which underlies all these six examples that I gave you before, is the ideal of ideology that nature is how you want to be. So, for example, if you feel like you're a transsexual or if you feel like you waver between the sexes, I guess gender fluid is the word for that,

then it must be true that there are not two sexes. That's an example of that. Or if you think that humans are infinitely malleable in their behavior, then you have to say that there are no such things as biological differences between men and women or ideological groups because nature has to conform to your political sensibilities. That's the object, that's the reverse of the naturalist, the naturalistic fallacy, which is what is in nature is what is good. I've just reversed that and said, well, what is good is what you must see in nature. And that's the reason for the whole ideological erosion of science these days.

Making, and it comes from postmodernism, I think the idea that, uh, there's a pluck rose and Lindsay were a book about this. I can't remember the third. It was quite good. Um, where they pin it all on postmodernism and its idea that there is no absolute truth, there are only personal truths in different groups and who wins is based on how much power they have. And that's sort of the thing behind this view that nature conforms to what you want it to be. If is it? If you're a scientist, you have to believe

there's an external reality and you have to believe because I mean, it works. We don't have to believe that. It didn't come about because this, you know, we have an ideology that there is a good external world that we can find out about. It just happens to be that there is and that, you know, COVID is caused by a small

viral particle and we can attack it this way and here's this DNA sequence. So that happens to be the truth, you know, it's not a personal truth. It happens to be a truth that scientists of any stripe can agree on. So, you know, the whole, I mean, this is what's happened to the whole world in the last 15 years or so is that ideology has taken over almost every discipline. Fortunately, it hasn't completely consumed science, but it's starting to. A quick aside, I've been drinking AG1 every morning for years now, and it just got even better. AG1 Next Gen keeps the same simplicity, one scoop once a day, but now comes with four clinical trials backing it.

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switch but I haven't, which is why I still use it. And if you're still unsure, they've got a 90 day money back guarantee so you can buy it and try it for three months. If you don't like it, I'll just give you your money back right now. You can get a year's free supply of vitamin D3 K2 and five free AG1 travel packs plus that 90 day money back guarantee by going to the link in the description below or heading to drinkag1.com slash modern wisdom. That's drinkag1.com slash modern wisdom. I don't know how I, I don't know where my position is on this now because, uh, I got not embroiled, but I certainly got interested in this world, this slow march through the institutions, this sort of progressive overreach that I think was doing a lot of

damage to a lot of academia. And that maybe reached fever pitch in 2020, 2021, something like that. And now I don't, I don't quite know what's going on. I think when the right are in power in America, there is much less of an impetus to talk about the crazy overreaches of the left, because the right feel like they've already won. They're still inside of the tent pissing out,

as we would say in the UK. out as we would say in the UK. And I don't know whether this also that fever pitch that reached in 2020. Is that a genuine pullback? Is that this March has been slowed? Is it, we've kind of realized that some of this stuff was a little bit kooky and people kind of went along with a social contagion idea thing that made them seem cool or seem trendy and now the trend seems to have swung in another direction a little bit or whatever. Is it that this is a genuine pullback or is it that there is a smarter game afoot from

the people who are trying to encroach on science with ideology where they're doing it in a much smarter way that doesn't get as many headlines, they're doing it in a much smarter way that doesn't get as many headlines they're continuing to try and repurpose math, repurpose chemistry, repurpose biology. I'm not really too sure but I certainly see fewer and fewer of those crazy woke lunatic story thing. I also think I certainly had a ton of news fatigue. Like how many right-wing articles and stories and videos do I need to see about the excesses of wokeness? And they always seem justified, right?

They always seem by the people that are trying to push back against them. This is the over, this shows the overreach that we've said was always going up. So, and there's this Cassandra complex. We told you about this before. This is going to go, but I'm not seeing as much anymore. And I wonder what that indicates. Well, it could be that, you know, they're winning. I mean, you're asking me to predict the future and I don't really know, but I think a bellwether for that is the loss of Kamala Harris in the United States in the election.

She was a real virtue signaler to the point where she, that's all she did. She never said anything true or anything rational or anything like that. I was not a fan of hers. I did vote Democratic, but I wasn't happy about it. And she lost pretty big time, you know? And at least some of that came from her rejection of the sex binary. I mean, that's, you can find that out by asking in the polls. So I don't think the right is winning because they're smarter. I think the right is winning. And I don't think that the pendulum has started swinging the

other way. I think the right is winning simply because something happened to the left and it may be the death of George Floyd. I don't know. That was about five years ago. That instilled us with a deep sense of guilt for being responsible for treating every marginalized group very badly.

And so we're hesitant to fight against this kind of wokeness because it makes us look like we're right-wingers too. So when I say, I mean, sex is a binary. I will swear to that. You know, I mean, when you look at why, and so you look at kangaroos, you don't say, well, there's a male kangaroo, there's a female kangaroo, that kangaroo looks like he's gender fluid to me. I mean, it's only in humans that you see this kind of stuff, which gives you a clue

that it has something to do with human psychology rather than biological reality. But, I can't forget my question. I guess. Oh, but yeah, about where this is going. Yeah. So for some reason, left has been deeply imbued with a sense of guilt. And of course the marginalized groups, I mean, they want that to happen because it means more stuff for them. Um, and to some extent it's true. I mean, they were treated horribly.

Um, N, um, Native Americans were treated horribly. Blacks were made slaves. And, you know, I, when I was a kid, I still remember when I arrived at college, there were two men's rooms and two women's rooms in the bus station. And I said, why's that? I was from Northern Virginia. I went to Southern Virginia.

And then I realized that one was for black people and one was for white people. So yeah, they were treated badly, but I think that people realize that and they're trying to make amends for it. The problem is they're going too far in the other direction now to valorize people that don't deserve to be valorized or to give unwarranted advantages to members of different groups, equity it's called, where my view is that everybody should have equal opportunity

to achieve from birth, but that's almost impossible to achieve. I mean, imagine a United States in which every person had the same resources, had two parents, had good schools, so they all had started out at the same point. I can't imagine that. It would take so much money to do that. And that, though, I think is the ultimate solution. You don't solve the problem by after the groups become different in different

ways, largely due to culture, by trying to make them equal by giving equal representation and groups. So I guess we've gone far off the topic. No, not at all. I'm interested in what you've learned about human nature from engaging with critics of your work. Well, about the reverse naturalistic fallacy, that people really aren't deeply wedded to what's true about the world. I guess people, you know, it's always been known that that's true, that people,

like religion to me, I mean, I'm an atheist, I have always been known that that's true, that people like religion to me. I mean, I'm an atheist. I have no bones about admitting that. And I don't believe in God because there's no evidence for God. I've never seen anything supernatural or any sign of divinity. And yet the vast majority of the world believes in God. I think 85% of Americans do, not so many Brits because they're more sensible, I guess. Religion has almost vanished in Scandinavia and Iceland. But that shows an example of how people will believe something that's true about the universe when there's not a wit of evidence for it. I'm only now, as I speak to you, coming to realize that this is not just something that's unique to science or to American society since the death of

George Floyd, that people always believe what makes them feel good, but gives them consolation. I think Karl Marx said that, right? What was his famous statement? Religion is the opium of the people. Of the masses. Yeah. Yeah. People, man, it's because what he meant when he said that was that he wanted, he wasn't,

he wasn't touting religion, of course, because he was, he was just saying that people that have it really bad in the world find their solace in a non-existent sky deity. And it's the same, I guess that you could draw a line between that and the people that find their solace who are, say, genitivist for it and thinking that sex is a spectrum. You believe what makes you feel good. Unfortunately, in science, we have such a thing as empirical truth, which comes back up against what many people want to be true. So, what would you say, given that we're an hour deep now,

we can talk about whatever we want. The only people left are the reasonable ones. Um, what would you say is a theory that you believe in and stand behind, but is currently the most publicly inflammatory or cantankerous I've, I've got one, uh, but I'm, I'm interested in hearing yours as well. Oh yeah, but I want to hear yours too. Well, a theory or a fact. You can pick, you can pick between the two. Well, the one that's got me in the most trouble lately is my assertion

that there's two sexes and no more. I mean, you know, to me, that's an indubitable fact because it, and not only is it indubitable, but it's explanatory. First of all it's universal because every animal and plant has two plant species as two reproductive systems. But it's not only. The reason I want to tout it is not just because I'm trying to force that down the throat of people that are gender dysphoric is because it's explanatory. It explains the notion of sexual selection.

Why males and females behave differently. Why males compete for the attention of females, which explains so much in the animal kingdom from the larger sizes of gorillas to the tail of the peacock, to the fact that when one sex is usually ornamented or brightly colored, it's almost always the male. I mean, it was Darwin in 1871 who raised that theory.

So that's one reason why it behooves us to believe what the truth is. Because it's, you know, I guess some people don't get this failure of wonder when they finally realize, by God, that is the explanation. Now certainly Darwin did, but he was reluctant to publish it. I mean, it was in the 1830s or early 1840s when he hit on natural selection, but he didn't publish it until 1859 because he was so worried about being damned for that.

But, you know, scientists, and we become scientists because of this sense of wonder, wonder at the truth of what really is out there in the universe, and we can understand it. But some people, I mean, I guess it just doesn't move some people, you know, they'd rather have their own personal truth, even if there's no evidence for it, because it makes them feel good. All right. Okay. Let me give you, let me give you mine. Let me give you mine. truth, even if there's no evidence for it, because it makes them feel good. All right. Okay.

Let me give you, let me give you mine. So you mentioned earlier on, you mentioned John Tooby. Uh, I, I very fortunately got to meet, got to meet him at HBES a couple of years ago. Um, I was, you say I was the least credentialed person in the room, uh, speaking at a, uh, speaking at a, uh, uh, speaking at a part of a symposium. Uh, and he came up after and he said some really lovely things about the show, uh, which was super nice to meet him.

And, you know, it was only a few months later that he passed away. Um, he's got his theory. I think it's the dysgenic theory of gene erosion with regards to mutational load. No, I don't know. Okay. So this is one of those, this is me doing a high wire act. Okay. Are you ready?

Okay. Let me do this dance in front of you, Jerry. So all species, but we're talking about humans, accumulate mutational load as you go generation to generation. Stop me when I get the technicalities wrong, but the principle is correct. Mutations occur. Many of these mutations are junk, make the species less effective, make the next generation less effective. They're less adapted to their environment.

And when you have heavy selection pressures, small changes in the the species less effective, make the next generation less effective, they're less adapted to their environment. And when you have heavy selection pressures, small changes in the animal are selected out if they're suboptimal, if they're not as good. You're less likely to survive and reproduce and pass on your genes. The issue in the modern world is that we have removed a lot of those selection pressures with healthcare. So there are a lot of examples. The one that's the least controversial that I can see you suffer with would be myopia or some sort of eye issue. Now, ancestrally, a mild blurring of the eyes maybe, you know, you wouldn't be able to read the grains of

sand on your hand, probably not that big of a deal. But as you start to push it a bit, I would guess, and even the grains of sand, I'm going to guess it's not that adaptive. I'm going to guess that over time, people who couldn't see quite as well would be less likely to survive and reproduce than people who could see well. But now we have glasses. So people who can't see particularly well have had the selection pressure on their eyesight removed to a degree, which means some people find glasses sexy.

Maybe that's even, maybe it's even an advantage for you to wear glasses. Maybe it frames the face in a manner. Maybe it's, it makes you seem a little bit more intellectual and academic and considered or something. It makes you seem a little bit more intellectual and academic and considered or something. But what that means is that you are accumulating a load, genetic mutations that makes further eye degeneration more likely over time. And it was his belief that this occurs across everything because we have life support systems and asthma inhalers and wheelchairs and all sorts of things.

And that if you remove the selection pressure, you will start to accumulate dysgenic mutational load, which means that the crumbling genome, I think as it's referred to, starts to get worse over time. And when you first proposed this, I think this was before genetic engineering was that likely. Could this be fixed by some gene therapies assisted by AI and advanced technologies at some point over the next 200 years? I would guess that seems probably at least partly likely. You're smiling.

Well, there's many conditions like heart disease and general decrepitus, you get older, are caused by many, many genes. So you'd have to fix each one of them and you have to fix them in your mother's DNA, not in your own DNA, because you can't edit every cell in your own body. But I think what you say has been duly true with the caveat that a lot of the conditions like wheelchairs and stuff did not obtain early in human evolution because we never got that old to be able to show these symptoms.

So the decrepitude was probably built in a lot of it, um it before, right. Because we didn't live that long. So you also need to have a, there is early onset decrepitude in a variety of different ways, right. And, and that, you know, you could say people at 30 are the way that they in 500 years time are the way that people at 60 would have been in 2025, let's say something like that. Because we, well, we've just got all of this technology to support them and we can continue to keep them living and so on and so forth. So unless you intervene in that regard, maybe that is.

But I mean, that is, you're getting perilously close to the E word of eugenics when you start talking about this, which is a topic. Actually that, that actually gets us to probably like the, whatever, the point of no return of the black hole when it comes to talking about anything in this realm. Yeah, we didn't even mention that. There's a lot of things to say about it, but I haven't studied eugenics much. Certainly in the UK, eugenics was always, it wasn't like the Nazis practiced. It wasn't like in the US where people were involuntarily sterilized. The Brits just wanted to up the reproduction of the upper classes.

That was their form of eugenics. And, you know, I don't believe that certain people should be rewarded for having kids and others penalized, but what happened in Britain is different from what happened in Nazi Germany and what happened in the UK. But getting back to what you said, yeah, I think you're absolutely right. There's no penalty now, pre-reproductively, for mutations that can be fixed medically. Now this of course only applies to humans because animals and other species don't have the,

you know, the workarounds to fix, you know, mutations. Well, you know, so interestingly here, one other animal group that I think you could say you're observing this, all of this was more to do with selective breeding would be dogs. You know, you look at English, British bulldogs, the shortening of the nose, we're going to make them cuter. We're going to make the hind legs shorter. We're going to do the whatever.

Like look at the shape of an Alsatian over the last hundred years due to selective breeding and you have these weird spinal problems, dash huns have got progressively lower and longer. And they end up snapping their own spines because they can't support them because, oh, it's so cute, he's exactly like a hot dog. And obviously that's being done selectively, but that is a kind of dysgenic breeding in a way.

Yeah, it's, yeah, as you said, it's zero artificial selection. Whereas what you were talking about is just due to the accumulation of mutations that have no clear penalty. Or the penalty can be offset somehow by, by technology. Yeah. But once you reached the post reproductive age, which is earlier for women than it is for men. I guess men can keep having babies till they're 80 or 90, women have to stop at man plus.

So mutations that arise after that post reproductive stage carry no penalty at all. You can still fix them with wheelchairs and catheters and stuff like that. But, you know. I suppose that, well, no, with wheelchairs and catheters and stuff like that. Right. You know, that's suppose that, well, no, you're right. You're right. I was about to say something like, um, I was about to say post-reproductively, if, if this was happening ancestrally, somebody that was a, uh, that was less robust would be a larger drain on resources, which would be maladaptive, but there is no mechanism for that person to be selected out of the gene pool because they are past their reproductive age.

So it's like a line has been drawn into the future from their impact on what's happening from a genetic standpoint. Is that a fair way to put it? Yeah, I mean the other alternative is the sort of grandparent effect that you know even though if you're not robust or healthy it's the advantage of your genes to hang around and take care of your parents or your grandchildren etc. But we don't know anything about that really. So, Jerry coin, ladies and gentlemen, Jerry, you're awesome. I really enjoyed today.

Today's been so much fun. Uh, where should you actually might be the most prolific blogger that I know. It is terrifying the amount of words that you put out on the internet. So where should people go if they want to keep up to date with your work? Yeah. the amount of words that you put out on the internet. So why should people go if they want to keep up to date with your work? Yeah, so the name of the website is Why Evolution is True, which is the title of my first book. I'd still recommend it because I really, really like that book. I don't think I could write it again. Why Evolution is True.

But if you want to come to the website, you just string all those together into one word, www.whyevolutionistrue.com. And you can see the website. It's very eclectic. I write about biology, but I also write about whatever. It started out as a way to publicize the book, the eponymous book that same day after my agent said, well, you know, maybe you should do what Neil Schubendale did. He wrote an awesome book called Your Inner Fish, about how we show the remnants of our fishy ancestry. He started a website to publicize that. My agent said, why don't you do that too?

I did it and that was a monster. I discovered that I'd like for A-9. I envisioned it as every couple of weeks I'd put up a piece of evidence for evolution. Well, now I just discovered it's becoming chronicle of my existence and of my thoughts. Yeah, I put it three or four pieces a day maybe. It's a big time sink, but I've gotten a lot more out of it than I have putting into it because I get feedback from readers.

I've made friends all over the world. I've even had two views from North Korea, although I don't know what have the internet in North Korea. Look at my website, but yeah, it's a, it's a good thing. And I have not yet grown tired of it. So long may you continue doing it, Jerry, you're great. And we didn't even talk about why evolution is true. We need, we can do an entire, another episode on, on all of the, all of the

stuff around that, but for now you can buy the book and you can buy the book now. And then when we do the next episode, you'll be a few steps ahead and you'll understand what we're talking about. Well, thanks for having me on. I appreciate you. Thank you. Sure.