Joan Roughgarden

This book is controversial in the evolutionary biology community because Joan Roughgarden denies sexual selection in favor of her own theory of "social selection." (She is also a Christian theistic evolutionist, though this does not come up much in Evolution's Rainbow.) I am not a biologist, but these ideas, from what I know, would be considered fringe by other evolutionary biologists even if they weren't unfortunately biased against Roughgarden for being a trans woman. Please read show more biologists' critiques of this book before accepting all its arguments uncritically.

Roughgarden is at her strongest when she calls out the misogyny and transmisogyny in biological literature. She is at her weakest when she dabbles in fields outside her domain, especially the social sciences. I understand this book's overarching argument that queerness is part of the natural "rainbow" of human genetics, but Roughgarden is, in my opinion, too ambitious in scope. This book would have been more coherent if she had stuck to biological and medical topics - which she is qualified to write about - rather than veering into theology and anthropology. show less

I had some extreme ambivalence about this book. Ultimately, it is an extremely ambitious book with a broad scope, aiming to be one of the major pieces of gender and sex literature for several groups, including biologists, educators, trans, intersex/people with differences in sexual development and genderqueer individuals, queer groups debating whether to include trans issues, politicians and doctors. So the fact that it was a little weak on some of these fronts was to be expected and cannot show more be said to detract from the overall groundbreaking nature of the book.

The book is organized into three parts: gender, sex and sexual orientation in animal organisms; gender, sex and sexual orientation in people, and finally, the history of gender variation in human societies.

Not surprisingly, given that Dr. Roughgarden is an organismal biologist, the first part is by far the strongest. And it's not just strong relative to the rest of the book, it is truly a superlative work. It explores first the biologic definition of sex and speculates about species in which there could be more than two sexes on the basis of diversity of gamete size in several known species. She then goes on to discuss hemaphroditism (sequential and simultaneous.) I didn't find much of this novel, probably because I consider myself somewhat of an amateur ichthyologist, and most of these early examples involved reef creatures I was already familiar with, but Roughgarden still presents it in a way that it is compelling and flows well with the earlier portion of the book on sex. The absolute best part of the book is about gender in animal species: Roughgarden explores several species (mainly birds, lizards, fish and insects, initially) looking at the diversity of gender roles and family structures that exist in different species. She speculates as to the evolutionary advantages of having a diversity of gender roles, in that it allows for rapid response to shifting environmental factors, and argues that it provides an increased chance of offspring survival in other cases. Finally, looking at mostly primates, Roughgarden discusses same sex relationships in the animal kingdom, again arguing that same sex relationships fill an evolutionary niche, by helping negotiate alliances that increase the chance of offspring survival. Importantly, in all of this, Roughgarden is very clear that exploration of gender, sex and sexual orientation variance in animals is important for our understanding of diversity, but she does NOT argue that LGBT people should be supported BECAUSE of the occurrence of parallel traits in animals, but rather just because it's moral to support them. She explicitly states that much of animal behavior should not be accepted in humans and much of human behavior that is valuable is not found in animals. I think warning people of how easy the naturalistic fallacy would be here and actively discouraging her readers from failing for it was both courageous and intellectually honest.

So ultimately, I have only two gripes with this entire first part, and both are completely semantic. One is that she continually refers to her idea of the "genial gene" (genetic traits that have evolved to encourage interorganism cooperation so as to encourage survival of offspring and thereby increase individual reproductive fitness) as being in conflict with the Dawkinsian idea of the "selfish gene" (genes evolve to increase survival of themselves.) These are not at all in conflict. They are both consistent with evolutionary biology as it is currently understood and the "selfish gene" hypothesis supports the evolution of genetic traits that are "altruistic" in behavior if that supports the expansion of the gene in the population. The second is that Roughgarden insists on referring to genetic diversity as a "genetic rainbow." In the middle of a narrative that is otherwise talking about gametes, alleles, and other complex biologic topics, all of a sudden using "rainbow" as a scientific noun is jarring and undermines Roughgarden's credibility. I know that she wanted to increase readability, but honestly, anyone who gets through this first section has the reading comprehension to understand the word "diversity."

The next two parts are rockier. I had the hardest problem with the middle part, in which Roughgarden makes several diversions. One is to criticize American medicine for overpathologizing people especially with genetic conditions. She makes an argument that if a trait has a certain population frequency, it must not be that pathologic. This argument is technically true: for a given allele frequency, there is a bound on the effect on reproductive fitness, given a limited de novo rate of mutation. However, this argument ignores the possibility of heterozygote advantage, given that many (most?) of the conditions that she argues therefore must be beneficial or neutral are autosomal recessive. In addition, the discussion of reproductive fitness is not a value judgement -- one of the conditions that she agrees must be the most deleterious to reproductive fitness, complete androgen insensitivity, is a condition that I would strongly argue should not be pathologized: people (usually women) with complete AIS require the use of advanced reproductive technology to have biologically gonads, because they have sperm-producing gonads, female genitalia and usually identify as women. That's a huge reproductive hit, but an otherwise normal person. On the other hand, she argues that salt-wasting congenital adrenal hyperplasia is overpathologized, and as a medical geneticist, I'm going to defend my right to pathologize genetic conditions that kill infants. She then extends herself to genetic conditions in general (not just differences in sexual development) and generalizes that the risks of genetic engineering, as well as the ethical risks of selective reproductive technology outweigh any benefit to treating these patients, whom she claims are overpathologized. Again, I'm sensitive, because this is my job, which I have a doctorate and extensive postdoctorate training in, but I see children die because of their "genetic trait, which is not necessarily a disease" and it is extremely sad. I have helped couples select embryos that do not carry the genetic condition that their sibling died of and I'm not sorry.
Dr. Roughgarden recommends at the end that the FDA certify whether a condition is a disease before a doctor can treat it, and I think this argument really showcases ignorance of the medical bureaucracy and the issues involved: FDA approval is an extremely slow process, even now, sticking to Food and Drugs, which there are clear processes for. The number of just human genetic diseases is in the thousands. She herself uses examples of allelic conditions where at one end there is clear disease and the other end is more a variant of normal (such as AIS and CAH above.) I daily see patients with alleles that have never before been reported. If I needed FDA approval to see a patient in my clinic based on their individual allele, it would probably take a decade for each patient to be approved! I wish that Dr. Roughgarden had been given an opportunity to attend a medical genetics clinic. I think modern medical geneticist are by and large thoughtful and avoid unnecessary pathologizing. I suspect that this is simply a case where Dr. Roughgarden, brilliant as she clearly is from the first chapter, is not as up to date on medical genetics. To be clear: I agree with her completely that patients with DSDs were historically overpathologized and were victimized by poorly considered operative strategies, and I understand that given her expertise in gender and sex she would be suspicious of the rest of the field.

I liked other parts of this chapter: Dr. Roughgarden thoroughly debunks the idea that there are substantial gender differences in humans. She then reviews the gender differences that have been reported and puts them into context for the reader. I wished she would have gone even further into rejecting the idea that there is scientific scaffolding for meaningful gender dimorphism in humans, but she does discuss this a little in part three, where she explores several cultures that have had a third gender as a category for either people with DSDs or people who are trans. This part is a little rocky, because at times, she imposes her categories on the narratives of the people she is summarizing. Although she is careful, she sometimes uses pronouns or nouns that are gendered differently than what the person used, claiming that the person would have identified as fe/male had that society allowed it. On the whole, I found it relatively interesting to look at the historic and geographic span that gender variation has occupied and encouraging to look at societies that were largely accepting of gender variation. show less

I know that evolutionary biology and gender studies are both rapidly developing fields, and so I wasn't sure that I wanted to read this book that's almost two decades old. But omg the Introduction alone is worth reading, just to get an idea of all the provocative ideas she's going to develop in the book proper. Clearly we're still not studying ourselves and other animals accurately, free of the bias of traditional binary roles of 'passionate male and coy female.' And clearly there's a lot of show more work to be done before we're all allowed to live our best lives.

I'm excited to read this rich work that promises to cover so much ground.
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Very carefully written. Requires attentive, careful reading. I only have time to read the first part right now, unfortunately, but plan to find it at my next library to finish it.

The first part is the most important, imo, though, because of how relatively old the book is. Biologists and biology educators are still all too stuck on "passionate male and coy female." In humans, however, a lot of progress has been made, even to giving gay people the right to marriage in the US, and to picture-books about transgendered children.

So, this very provocative statement probably isn't as necessary as it was when Roughgarden wrote it:
"What seems immoral to me is transphobia and homophobia. In the extreme, these phobias may be illnesses requiring therapy, similar to excessive fear of heights or snakes."
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Other bits from the first part, that focused on 'animal rainbows:'

"... sex is essentially cooperative--a natural covenant to share genetic wealth. Sexual reproduction is not a battle."

"Neutralists have often squared off against adaptationists in evolutionary biology." Is homosexuality in different species and therefore not evolved out, or is it adaptive?

"Mating is one component of fitness, but a preoccupation with 'mating success' has led to an emphasis on mating to the exclusion of other components of fitness. In reality, female choice considers the overall production of offspring, keeping mating in perspective." " I argue that almost all diversity is good and that female choice is more for the best match than for the best male."

"The problem with female mimicry is not that it is bizarre; the problem is that female mimicry is a myth."

"Deceit theory is a trap. Deceit theory forces scientists to take sides on who is smarter--in this case (that of European kestrels), claiming that females are smarter than males."

"I believe scientists have failed to publicize effectively that the notion of a tooth-and-claw struggle for existence was discarded over 50 years [70, now] ago, What actually happens in nature is much kinder than people have been led to believe."

"As ever-increasing similarities between animals and humans are revealed, do animal societies become more relevant to human societies than previously believed? Should political science and sociology, basic subjects in the human social sciences, be widened to include investigations of how animal societies function? I think so."

"Biology need not limit our potential. Nature offers a smorgasbord of possibilities for how to live, and an endless list of solutions for every context...."
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Btw, a lot of other reviewers miss the points. For example, one scolded the author for socio-political commentary... apparently they had read neither blurb nor introduction. Another said the author over-reached... apparently they missed all the times that she said she was theorizing, and that she was exploring ideas, and that she was suggesting avenues of research.

Bottom line, I do recommend the book and give the intro. and first section (especially the last chapter of that section, Chapter 9, "The Theory of Evolution") 4 stars. show less

Very mixed feelings about this one.


Biologist Joan Roughgarden (who used to be Jonathan Roughgarden and who therefore has some personal insight into the situation), probably annoyed at being preached at for being “unnatural”, has compiled a detailed and meticulously documented list of “unnatural” behavior in nature, including multiply-gendered sparrows, adulterous blackbirds, sex-changing fish, lesbian geckoes, bonobo prostitutes, and butch hyenas. A lot of this stuff is just show more fascinating. We’ve had a thread about intersex fish, with pesticides, “endocrine disruptors” and so on blamed for their “unnatural” condition. Well, Roughgarden documents lots of fish have such “conditions”, changing sex one or more times during their lives.


Similarly, Roughgarden describes in fine detail exactly what goes on during the gender development of humans, from egg and sperm on up, and various places where this can go “wrong”, aka "different".


Finally, although it’s outside her field, Roughgarden has an anthropology section discussing various human groups with different attitudes toward gender roles, such as the “two spirit” Plains Indians. This is a little weak compared to the other sections, although I don’t think that’s Roughgarden’s fault; the problem is that the anthropological literature is weaker and also prey to political interpretations. Nonetheless it’s interesting and a starting point for more research.


If that was all there was to the book, it would be outstanding. Unfortunately, Roughgarden gets carried away with what are clearly hot-button issues with her. The first is sexual selection theory (the subtitle is “Why Darwin Was Wrong About Sexual Selection”). In case you’re not familiar with the concept, “sexual selection” was Darwin’s explanation why certain animals (usually only the males) have apparently non-adaptive characteristics (such as the tail plumage in a peacock). Sexual selection theory suggests that peahens that select males that make the proudest display will be favored, because any peacock that can carry that much extra baggage around and still escape from predators must be a good specimen. Roughgarden doesn’t like this (in fairness, she’s not anti-Darwinian, just anti-sexual selection). She never really fully explains why, at least not enough for me to understand. However, it’s a little puzzling that someone who did such a thorough literature search for her gender diversity examples doesn’t mention some of the experiments supporting sexual selection.


Finally, in her appendix, Roughgarden just leans back and lets political correctness take control. The appendix is entitled “policy recommendations” and includes the following, presented without any comment – it would be superfluous:


*Premed curricula have required course on biological diversity.

*Medical curricula have required courses on human sexuality

*The FDA should maintain an official list of “diseases”

*The FDA should regulate surgical and behavioral therapies

*Biotechnologists should take an oath to “protect the human gene pool” and to “use biotechnology for peace”.

*Biotechnologists should be licensed

*Biotechnology companies should be required to commit to “protecting the human gene pool” and “pursue peace”.

*There should be “epidemiological impact reports” for new therapies similar to environmental impact reports.

*There should be a common code for ecological and environmental impact reports.

*And, lastly, there should be a “Statue of Diversity” in San Francisco similar to the Statue of Liberty in New York.


Well, I said I had mixed feelings about it. I haven’t read a book in a long time where the desire to jump out and shout “This is great!” alternated so frequently with the desire to hurl the thing against the wall. show less