Carole Hooven Profile picture
Aug 6 4 tweets 4 min read Read on X
🧵1/4
A Harvard professor has just published a glowing review of Yale Professor Agustín Fuentes’ new book, Sex is a Spectrum, in The Lancet—one of the highest-ranked, most prestigious medical journals in the world. In it, she asserts that the “gametic definition” of sex—roughly, that there are two sexes, defined by whether the organism produces sperm (male) or eggs (female)—is not only “harmful,” but also “sophistry, not science.” (Lancet piece is below.)

I hold the gametic view. To the best of my knowledge, this is the view held by most evolutionary biologists. The author of the review has different ideas, and quotes approvingly from Fuentes’ book on the nature of sex: “sex is a biocultural construct. Gamete size represents but one of multiple components and developmental processes—including gonads, hormones, genitals, fertility, mating, parenting behaviour, secondary sexual characteristics, and gender identity.”

People disagree about the nature of male and female, and that’s OK. Respectful disagreement among scholars should be encouraged; it often sharpens thinking and research. But The Lancet review goes well beyond disagreement about the facts, and exemplifies one of the main reasons Harvard is being targeted by the government.

Nobody wants to be called hateful or bigoted (especially by faculty with fancy endowed professorships), or even tainted by close proximity to views that could be construed that way. But not only has the Harvard professor disagreed with the gametic view, she apparently feels free to publicly impugn the ostensible motives and character of those who endorse it. Without providing any evidence, she asserts that our view is motivated (at least in part) by political aims, and harmful ones. As she wrote in The Lancet:

“Although the gametic definition makes reference to biological systems, it is sophistry, not science. Those who promote this definition favour the assertion that sex inheres in gamete (sperm and egg) production because, in part, it facilitates their political aims by fuelling unhinged panic in some quarters about transgender threats to traditional gender roles.”

She praises Fuentes for recognizing scientists’ “responsibility to respond to harmful deployments of inaccurate, overly simplistic, and reductionist science by those attempting to naturalise and depoliticise their hateful views.”

And last, there’s the link between those who hold the gametic view and bigots: “Like scientific bigots of yore—such as the anthropologist J McGrigor Allan, who in 1869 pronounced in the Journal of Anthropological Science that, ‘Thousands of years have amply demonstrated the mental supremacy of man, and any attempt to revolutionize the education and status of women on the assumption of an imaginary sexual equality, would be at variance with the normal order of things’—the recent favour bestowed on the gametic definition of sex by anti-trans gender traditionalists appeals selectively to science to naturalise and rationalise inequality and exclusion.”

The subtext is that in science, simply following the evidence is ill-advised if you (or others who have power over you) think it will lead to social harms. What kind of person would want to hold, let alone give voice to such harmful views as the gametic one?Image
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2/4
“Gametic Politics: Eggs, Sperm, and Gender/Sex in the 21st Century" is the title of a recently announced workshop organized by the author and her colleague at Yale (link below). It is designed to provide mentorship to early career researchers who “are studying any aspect of ‘eggs and sperm.’” Potential topics include:

the politicization of gametes across multiple domains, such as medicine, education, sports, and law
the intersection of gametic politics with myriad forms of inequality, such as those associated with gender, race, class, and sexuality
individual experiences of and beliefs about gametes, including in relation to one’s gender identity

Would someone who holds the gametic view be comfortable participating in this workshop? Would any student in a class taught by the Harvard professor, having read her Lancet piece, feel free to write a paper that argued for a different view, of the science or politics?

Harvard and other institutions of higher ed—that is, the faculty and administrators— should feel a sense of urgency about promoting a culture that supports Veritas and prioritizes good faith disagreement and viewpoint diversity. And the public should be able to see the results. We won’t be strong enough to face down our opposition if we can’t unite under shared principles at home.
renealmeling.com/gametic-politi…

A link to Fuentes' article on why sex is not binary is in the next post.
3/4
@Anthrofuentes on why sex is not binary:
Dawkins' article on the nature of sex is next.scientificamerican.com/article/heres-…
4/4
@RichardDawkins on the science of sex (it's binary and based on gametes):
richarddawkins.substack.com/p/is-the-male-…

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More from @hoovlet

Jun 28
🧵“Philosopher [MIT prof Alex Byrne] Wraps Cooperation with Trump in Flag of Academic Freedom.”
That's the headline of UNC philosophy professor Justin Weinberg's June 26 post on his philosophy news site, Daily Nous (@DailyNousEditor). I'm posting comments here since Weinberg has chosen to not to open them on this particular post.

What's Byrne's sin? He served as one of nine co-authors on the recently released HHS report “Treatment for Pediatric Gender Dysphoria: Review of Evidence and Best Practices.” (Available on the HHS website.)
Weinberg clearly disagrees with Byrne (who, for the record, did not vote for Trump) about whether serving as a co-author of the report was the right thing to do.
I happen to have intimate knowledge of Byrne’s motives—I'll refer to him as “Alex” from here on—because I’m married to him. We talked extensively about his decision, and I came to fully understand and respect the choice he made, even if I might have made a different one.
Alex believed that his participation would help to ensure that the report was of the highest possible quality, and that it would be a useful resource for parents in particular who are looking for clear information about the costs and benefits of medical treatment of their children's gender dysphoria.
Overall Alex believes that medical practices (especially those involving children) should be based on strong evidence, produced and discussed in an open environment free of harassment and threats of reputational damage.
Especially after working on the report, he is convinced that the evidence supporting medicalization of gender dysphoric kids (AKA "gender affirming care") is weak.
After Alex’s name was leaked as a co-author, Weinberg wrote (in his May 6 post) that it would be “appalling” for a philosopher to participate in such a project. Doing would mean that the philosopher had “decided to help Trump” with his “selfish and authoritarian ambitions,” “cruelty” regarding “immigrants, government employees, the disabled, and the domestic and global poor,” and “transgender women and men.” So perhaps authors should have been limited to extreme right wingers?
After Alex confirmed his participation in a June 26 OpEd in @WaPo OpEd,
wapo.st/44oV5Pg
Weinberg responded with his thoughts in a post that same day.
dailynous.com/2025/06/26/phi…
BTW here is what the @washingtonpost editorial board had to say about the HHS report:
"Clocking in at more than 400 pages, including appendixes, the HHS report is a careful, thorough and definitely skeptical tour through the subject, including the history of gender medicine, the evolution of pediatric interventions, the evidence for pediatric medical transition, and the ethical conundrums that researchers and practitioners face. Critics have been scathing about what they see as the report’s bias and shortcomings. But it makes a legitimate case for caution that policymakers need to wrestle with." wapo.st/449pZwg
Read 5 tweets
Apr 8
Cordelia Fine and I disagree about the degree to which differences in sexual selection and testosterone contribute to behavioral sex differences humans. In this "spirited" exchange (link in comments), we probe the source of our divergent views. It's been a few years in the making, and I wasn't sure it would see the light of day. Thanks to Aeon (especially Sally Davies) and Cordelia for sticking with it!
Cordelia pulled a quote from my recent @TEDTalks, writing: "Carole has denied that she thinks that testosterone ‘makes men what they are’. Yet in her recent TED talk, she stated that prenatal testosterone ‘made my son who he is today’." So I wanted to provide the full talk for context (I say this in the last few minutes, and yes, I was tearing up). ted.com/talks/carole_k…
Cordelia also pulled a quote from the Boston Globe, so again, here's the full article for context: archive.ph/2025.02.20-110…
Read 5 tweets
Mar 25
🧵World Athletics (the international governing body for track & field competitions & world records) will now require genetic testing to verify female sex. The Guardian says doing this will also "bar athletes with a difference of sex development (DSD) – who are reported female at birth but undergo the physiological benefits of male puberty – from the female category."
This is a misleading comment, and it's brought to you by the erosion of clear & shared language. Unfortunately there's been full buy-in from progressive outlets like the Guardian. theguardian.com/sport/2025/mar…
"Assigned female at birth," is often taken to mean, simply, "female." "Reported female" is better, but the casual reader likely doesn't make distinctions between "reported" and "assigned." But either way, are these DSD athletes male or female? Unclear in the article, but not in reality. That's because there's no mention of the fact that the athletes with DSDs who will be barred from the female category are male, with XY chromosomes and testosterone-producing testes. If they experience the "benefits of male puberty," testosterone is having a profound, positive impact on their athletic ability.
The Guardian article can easily give the impression that these athletes are females who happen to have high testosterone, and are being discriminated against for their natural variation. That's not true.
Here's more info (from a previous tweet) on that particular DSD and the relevance for sports: x.com/hoovlet/status…
Here's another Guardian article (2018) explaining how "women such as South African athlete Caster Semenya"(see above) have naturally high testosterone levels, and that the IAAF’s (now World Athletics) testosterone test is "irrational, idiotic and unfair," because "research suggests that the testosterone gap that exists between men and women disappears among elite athletes." Really? La la land. theguardian.com/commentisfree/…
Read 5 tweets
Nov 16, 2022
🧵The Archives of Sexual Behavior recently published a special section on the difficulties scholars are facing in teaching, clinical practice & research in the area of sex & gender. Open access links to the 4 articles (including mine) are below. 1/
I described some of the trouble I’ve had at Harvard in response to speaking about the binary nature of sex, & I make some recommendations about how universities might better handle these kinds of situations in the future. We are telling our stories because #academicfreedom, 2/
particularly around #thescienceofsex, is under threat, handicapping ability to produce & communicate knowledge, discuss/challenge & ideas. This matters for lots of reasons, but especially because understanding the nature of problems we face is a crucial step in solving them. 3/
Read 10 tweets
Aug 27, 2022
"the idea of maternal instinct as something innate, automatic and distinctly female is a myth, one that has stuck despite the best efforts of feminists to debunk it from the moment it entered public discourse." nytimes.com/2022/08/26/opi…
The reason that the idea of a "maternal instinct" has stuck is that it is true. The whole point of instincts is that they are "innate," meaning, the capacity is present from birth—natural or inborn. Ready to go given the "right" developmental stage, individual circumstances,
and social/ecological environment. "Innate" does not mean that a particular trait is inflexible, universal, or morally sanctioned by nature. And I'm not sure how "maternal" can mean anything other than "distinctly female."
Read 7 tweets
May 14, 2022
Long 🧵
In his article entitled “Biological Science Rejects the Sex Binary, and That’s Good for Humanity,” Princeton anthropologist Agustin Fuentes informs us that “Science points to a more accurate and hopeful way to understand the biology of sex…
sapiens.org/biology/biolog…
that is more conducive to respect and flourishing.” What is this new take on the biology of sex that should replace the “sex binary,” and how will it promote respect and flourishing? Neither question is clearly answered in his essay. What is clear is that Fuentes thinks
"the belief that biology creates two types of humans”—a “sex binary”—is not only wrong, but bad for humanity. Evidently, better beliefs about biology and the binary should be informed by an appreciation for the diversity of genitalia, hormones, and behaviors across male and
Read 15 tweets

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