My generation bought Men Are from Mars, Women Are from Venus the way it bought avocado bathroom suites: in bulk, with conviction, on credit, and with no plan for the day somebody asked why. Nobody can say how many copies that was. Gray’s own website claimed thirty million by 2005 (as cited in Hyde, 2005), a publisher’s blurb says fifteen (Apple Books, n.d.), and HarperCollins now says fifty (HarperCollins, n.d.). An accountant who rounded like that would be struck off. In publishing it’s called momentum.
So does the book hold up? Here’s the barbecue answer. Gray was right about the feeling and wrong about the postcode, and the postcode is on the move. Pull up a chair and I’ll take it apart in the order the evidence turned up.
What the book got right
You’ve lived the loop. One of you pushes, the other backs away, the pushing gets louder, the backing gets longer, and by Tuesday you’re running the marriage by fridge note. A review of 74 studies found it tightens because each of you sees the other as the cause (Dick Jones Communications, 2014; Schrodt et al., 2014). Gray’s stroke of genius, and I mean that as a commercial observation, was to remove the cause from the building. Nobody’s being difficult on purpose. He’s from Mars. It was couples counselling with the blame outsourced to the solar system, and relief did the selling.
Whether a paperback fixes a marriage is a question the divorce courts answer rudely: among Americans over thirty-five, divorce rates doubled over two decades (Kennedy & Ruggles, 2014). That’s hardly Gray’s fault. It does mean nobody’s sending him a thank-you card.
What the psychology sends back
My bullshit detector started beeping long before the data turned up, and it was the planets that set it off. Gray’s map explains everything. A man withdraws: Mars. A man doesn’t withdraw: he’s in touch with his Venus side. A theory that can’t lose has stopped being a theory and become a horoscope with a better publicist.
Then the clipboards arrived. Janet Hyde pulled together 46 meta-analyses of sex differences and found 78 per cent of the 124 effects she could classify were small or close to zero (Hyde, 2005). Remember the line that women speak 20,000 words a day and men 7,000 (Brizendine, 2006)? Researchers finally strapped recorders to 396 people and counted. Women: 16,215 words. Men: 15,669. That’s a gap you could lose between the pub and the car park. And the three biggest talkers in the study, all above 40,000 words a day, were men (Mehl et al., 2007; Wilson Quarterly, 2007). The man in the cave has plenty to say. He just isn’t saying it to you.
The nature camp isn’t empty-handed. Add up enough personality traits and the sexes drift further apart than any single trait suggests (Del Giudice et al., 2012), and 5,216 brain scans showed real average differences with a great deal of overlap (Ritchie et al., 2018). But an average is a postcode. It tells you roughly where the street is and nothing about who lives at number 14, whether he’s home, or whether he’s a teacher or a bikie.
Who hands out the uniforms
Linguists noticed years ago that women and men can misread each other the way people from different countries do, because the rules of friendly talk get learned young, among friends, mostly of the same sex (Maltz & Borker, 1982). Tannen turned that into a bestseller two years before Gray did, and she left everyone on Earth (Tannen, 1990). Across 166 studies, boys and girls showed their feelings in fairly similar ways overall, and differed most when other kids or unfamiliar adults were watching (Chaplin & Aldao, 2013). No hormone has ever been known to check who’s in the room.
Sociologists West and Zimmerman argued that being a man or a woman is something we do all day, in front of an audience that can mark us down: a ‘routine, methodical, and recurring accomplishment’ (1987). Connell and Messerschmidt added that the ruling ideal of masculinity needn’t be common (‘only a minority of men might enact it’) yet everyone gets graded against it (2005). So picture the man retreating to his cave. He’s obeying a committee of other men who aren’t in the cave either, who have never met, who keep no minutes, and who would deny the committee exists. He’s no villain. He’s a graduate of a very long course whose syllabus he never saw.
And the cave is a position, not a planet. Who pushes and who retreats depends on who wants the change (Christensen & Heavey, 1990). In 63 straight, gay and lesbian couples the same pattern showed up in all three, which made the researchers suspect power rather than sex (Holley et al., 2010).
Both, then
Psychology hands out small average differences. Society hands those differences a uniform, a syllabus, a dress code and an audience, then calls the result nature. Wood and Eagly’s version is that who does what in a society sets the roles, the roles shape the traits, and the traits end up looking like they were there all along (2012). Philosophers picked sides too. Gilligan (1982) said women speak in a different moral voice, one of care, though a review found little support for that as a gender split (Jaffee & Hyde, 2000), while Butler (1990) said gender is something we perform and not something we are. Gray, with his planets and a travel brochure, was nearer the first. The universe, which has had roughly thirteen billion years to take an interest in who does the dishes, has declined to comment.
The floor under the planets
I should come clean: I’ve been round this block twice already. In the first of my two Quiet Half essays I agreed with Soraya Chemaly that women stepping out of men’s lives is overdue housekeeping (Chemaly, 2026, as cited in Hopkins, 2026c), and discovered I’d been ‘a self-made man in the way a hotel bed is self-made. Someone came in while I was out’ (Hopkins, 2026c). That’s Gray’s cave seen from the inside. It was never a planet. It was a room somebody else kept tidy.
Why does the performance never stop? Vandello and colleagues (2008) found that people treat manhood as precarious: hard to earn, easy to lose, and in need of constant public proof. Proof needs an audience, which is West and Zimmerman’s point in a different hat, and for most of history the audience was women who weren’t free to leave. When they go, or just stop clapping, it feels like finding out your laugh track was on a retainer.
Then the second essay disagreed with the first, which is what happens when you mark your own homework. If women are walking away, why is half of YouTube full of women asking where the men went? So, I counted. Worldwide there are about 102 men for every 100 women, but the young single American man has retreated: the share of single men looking for a relationship or dates fell from 61 to 50 per cent between 2019 and 2022, while single women barely moved (Pew Research Center data, as cited in Hopkins, 2026b). My theory was fear, specifically of being filmed and posted. I went looking for a study and found none, and women in the same survey were even less confident about approaching than men, 21 per cent against 29 (Hopkins, 2026b). My theory ‘went to the lab and came back with a note from the teacher’ (Hopkins, 2026b).
What survived the marking was this: ‘when the floor goes, some men don’t climb. They sit where they landed and wait for somebody to tell them it’s safe to stand’ (Hopkins, 2026b). That’s a better cave than Gray’s. His man withdraws to recharge. Mine is sitting on the carpet holding his phone like a bloke at a bus stop who’s been told the bus is cancelled and is waiting for someone to confirm it.
The postcode is moving
Now to the country I live in. In Vietnam, the people redrawing the map aren’t holding placards. They’re holding degrees. Women’s enrolment in university-level study runs about 16 per cent above men’s (World Bank, 2024). Average age at first marriage has climbed to about 27, up two years since 2019 (Carr-Ellison, 2025). Fertility fell to 1.91 children per woman in 2024, the lowest in modern history, and to 1.47 in the Southeast region around Ho Chi Minh City (Carr-Ellison, 2025; Pham, 2025). Experts point to living costs and a job market with room for women’s careers (Carr-Ellison, 2025). Nobody has found a manifesto. It’s a revolution conducted by timetable.
Count it the other way and Vietnam gets odder. Reports put around 415,000 more men than women aged 20 to 39, a gap projected to reach 711,700 by 2034 (VietNamNet, 2026, as cited in Hopkins, 2026b). On headcount alone, Vietnamese women should be holding every card at the table, and they seem to be using the cards to leave early. I found no Vietnamese ‘where are the men’ videos. If an urban, English-fluent version turns up, the numbers say it’ll be about eligibility rather than headcount (Hopkins, 2026b).
The old son preference is traced to Confucian teaching. In a modest survey of 397 people aged 18 to 30, only 2.77 per cent said a son was necessary, 78.3 per cent ranked a partner’s education as a priority, and 94 per cent said husband and wife should share the chores (Nguyen, 2025). The only time-use figures I could find, from 2015, had women doing 38.7 hours a week of unpaid care and housework against men’s 26.2 (Viet Nam News, 2017). That’s Arlie Hochschild’s ‘second shift’, where working mothers put in an extra month of labour a year compared with their husbands (Hochschild & Machung, 1989/2012), with a Vietnamese postcode. The attitude has moved faster than the dishwasher, and the research says the partner who wants change is the one who presses. A lot of young women here seem to be pressing by postponing.
There’s a scene near the start of my book Death of a Gentleman. In a Đà Lạt café two young Australians, one in a Top G T-shirt, are explaining women to a Vietnamese woman at another table. The smaller one calls out that she should smile more, ‘with the confidence of someone who has not considered the possibility that she speaks four languages and has chosen, at this precise moment, to use none of them’ (Hopkins, 2026a). She finishes her coffee, marks her page with a receipt and leaves without looking at them. I wrote it as their problem. Then I noticed I was the older model of the same product, with better manners and a master’s degree (Hopkins, 2026c). The book gives the verdict plainly: ‘They are customers. Someone has sold them this. And I, for a decade, helped build the shop’ (Hopkins, 2026a). They wanted her attention by right. I wanted it by merit, which sounds nobler until you notice we both assumed it was on offer.
I’m a guest in this country and a boomer, and these women owe me no explanation. In one household I belong to, nobody uses my name. I’m Grandpa, a position in the family rather than the thing it orbits, and it’s the most restful title I’ve held (Hopkins, 2026c). From Đà Lạt, it looks like the clearest live test of Gray’s map I’m going to see.
Planets as flags
None of this is peculiar to Vietnam. In the United States, 63 per cent of women and 46 per cent of men aged 18 to 29 voted for Harris, the widest gap Catalist has measured in four presidential cycles (DCReport, 2026), and in a September YouGov poll 49 per cent of young women and 20 per cent of young men called themselves feminists (Padilla, 2026). Planets would predict two camps barely speaking. Yet 43 per cent of those women and 51 per cent of those men agreed society would benefit from a return to traditional gender roles (Padilla, 2026). Identity politics hands each camp a planet, and a planet is an efficient thing to belong to: it comes with a flag, a grievance, a group chat and nobody inside it to argue with.
The people who would write in
Here are the five emails I expect, and what I’d say over a beer.
You’ve shrunk differences that show up everywhere. Fair hit, and the numbers are on your side. Falk and Hermle (2018) surveyed about 80,000 people in 76 countries and found differences in risk, patience, altruism and trust were wider in richer, more gender-equal countries, the opposite of what ‘roles shape traits’ predicts. The authors read it as freedom giving each sex room to express its preferences, and evolutionary psychologists add that evolved mechanisms aren’t blind to environment (Kenrick & Li, 2000). That dents Wood and Eagly’s prediction that the gap narrows as roles equalise. It doesn’t dent mine, because I never said the sexes converge. I said an average is a postcode. If freedom widens the gap, young Vietnamese women are choosing differently from men and not turning into them, and the choosing is theirs, not Venus’s. The nature and nurture argument has run so long it qualifies for the seniors card.
It worked. Millions of couples stopped fighting, and you’re sneering from a comfortable chair. I’m not sneering. Blame stopped and relief sold the book, and I meant both. But Hyde warned that couples told they come from different planets ‘may simply give up on trying to resolve the conflict through better communication’ (2005, p. 590). I found no study measuring the book’s net effect on marriages, so nobody on either side gets to wave a statistic around. My complaint is narrow: keep the kindness, drop the cargo.
Who are you to say? A Western boomer, in the country since May 2025, turning Vietnamese women into an illustration for a thesis. Guilty on the first two, contesting the third. The numbers belong to Vietnamese statisticians and journalists, and the reasons belong to the women. I can’t tell living costs from careers from an armchair. My wife’s daughter works in Saigon and mother sends daughter money to pay her studio apartment rent, because daughter’s salary doesn’t make ends meet in an expensive city. Enrolment, marriage age and fertility are consistent with women renegotiating the arrangement. They don’t prove it, and my last line is a hypothesis wearing a punchline.
You’re cheering a national emergency. Later marriage and fewer babies are why Vietnam’s lawmakers scrapped the two-child limit in June 2025 (Pham, 2025). I’m not cheering. I’m reading. The same survey has 78.3 per cent of young Vietnamese ranking a partner’s education a priority and 84.6 per cent calling marriage necessary, though many want to wait until after thirty (Nguyen, 2025). That looks like postponement and not abandonment. Whether it’s a crisis depends on whether you think the problem is the women’s timetable or the arrangement they’re being asked to join.
Women say the men are missing, and women are walking away from men. Pick one. Both, and the headcount is the smaller part. In most countries the numerical shortage barely exists, and Russia is the large exception, where women have said it quietly for eighty years. Elsewhere, the shortage is of men who clear a floor that has risen (Hopkins, 2026b). A woman can decentre men and still hope to meet one worth recentring a little. I called that ambivalence, ‘which is what most of us feel about anything worth having’ (Hopkins, 2026b).
The map
Gray gave my generation permission to stop blaming each other. But before you ask which planet your partner comes from, ask who drew the map, who gained from the borders, and who has quietly started moving them. From my favourite café in Đà Lạt, my guess is she’s young, she has a degree, and she hasn’t looked up from her coffee.
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