At a women’s leadership summit a few years ago, I first heard about Reference Man. This week, I was reminded how deeply this male default has shaped a world not built for women.
Reference Man was formalised in 1975 by the International Commission on Radiological Protection. He is defined as a white, Western European male, aged 20 to 30, weighing 70 kilograms. He was created to standardise radiation exposure limits, a practical problem requiring a practical solution. Designers and scientists used the data they had. And the only data they had was data of men.
That choice, made half a century ago, embedded a bias so deep it became invisible. Reference Man became the default human.
Today, Reference Man is not a historical footnote. He is still the default in pharmaceutical dosing, medical device design, vehicle safety, workplace ergonomics, urban planning, and artificial intelligence. He is the ghost in the machine of nearly every system designed to keep us safe and women are paying for his dominance with their health, their safety, and their lives.
Consider the car. Crash test dummies have been modelled on the male body for decades. The consequences are not abstract because women are 73 per cent more likely to be injured in a frontal car crash than men, according to research published in the American Journal of Public Health. It was not until 2022 that Sweden introduced the world’s first average female crash test dummy. Nearly 50 years after Reference Man was formalised, the automotive industry finally got around to crash-testing a body that represents half of all drivers. The data gap is not ancient history. It is happening now.
Medicine tells the same story. Women were largely excluded from clinical trials until the 1990s, meaning drugs were tested, dosed, and approved based on male physiology. Women experience adverse drug reactions at nearly twice the rate of men. Heart attacks present differently in women and are routinely misdiagnosed because the textbook presentation was written from male data. Women’s symptoms are often dismissed because they were not understood.
Women are not a niche demographic. We are 50 per cent of the population, and yet we have been treated as a deviation from the norm, not even an afterthought in the design process. The smartphone was sized for a man’s hand. Personal protective equipment was scaled down from male templates, leaving women in ill-fitting gear that exposes them to injury on worksites. Even office temperature is calibrated to the male metabolic rate, leaving women chronically cold while their discomfort is dismissed as personal failing rather than systemic design failure.
The problem deepens when we apply an intersectional lens. The gender data gap does not affect all women equally. Black women, women with disabilities, trans women, and women in the Global South are further erased. Reference Man is not just male. He is white, able-bodied, and Western. The further a person sits from that template, the more invisible they become in the data, and the more dangerous the world becomes for them. An equal world cannot be built on a foundation that renders most of its inhabitants statistically non-existent.
The shift toward gender-inclusive design is gaining momentum. Some researchers now mandate gender-disaggregated data. The EU has pushed for sex and gender analysis in publicly funded research. Caroline Criado Perez’s Invisible Women brought the data gap to mainstream attention, documenting in meticulous detail how the absence of female data shapes everything from the drugs we are prescribed to the public spaces we navigate. It revealed that the default human, in research, in policy and in design, has always been male. Criado Perez stresses that this is not accidental but the compounded result of centuries of women being excluded from the rooms where decisions are made.
These are meaningful steps, but awareness is not enough if it does not change practice. Gender equality cannot be achieved when the systems designed to protect and serve us were built without us in mind. Every algorithm trained on biased data, every drug dosed for a 70-kilogram man, every seatbelt that does not account for a pregnant body, these are not neutral oversights. They are political choices with physical consequences.
Reference Man was built in 1975. In 2026, he should no longer be the default. Designing for the full spectrum of human bodies is not a favour to women. It is the bare minimum of what equality actually looks like.
Now we know his name. You cannot dismantle a system you cannot see and now that we can see it, we can never unsee it.