Invisible Women

Data Bias in a World Designed for Men

Caroline Criado Pérez

12 min read
1m 21s intro

Brief summary

Invisible Women argues that by treating the male experience as the universal human standard, we have built a world with a systemic data bias that makes life inconvenient, expensive, and even deadly for half the population. This bias affects everything from the size of your smartphone to your odds of surviving a car crash.

Who it's for

This book is for anyone interested in how gender bias shapes our society, from product designers and policymakers to medical professionals and urban planners.

Invisible Women

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Introduction: How the World Ignores Half its Population

For centuries, the male experience has been treated as the universal human experience. This habit is so deeply ingrained that it shapes our understanding of everything from ancient history to modern technology. As far back as the fourth century BC, Aristotle described the female as a natural aberration from the male standard. This perspective suggests that being male is the default, while being female is a secondary variation. This bias continues to distort the way we collect data and tell the story of our species.

Our theories of human evolution are built on this lopsided foundation. For decades, the theory that human intellect and social structures were forged by male hunting activities dominated anthropology. When critics pointed out that women were simultaneously gathering, weaning, and caring for children, their insights were often sidelined. Even today, when researchers claim that humans have an evolved instinct for deadly violence, they often ignore that such violence is overwhelmingly a male behavior.

This male default mindset even affects how we interpret physical evidence. For over a hundred years, a famous Viking skeleton found with weapons and horses was assumed to be a high-ranking male warrior. When DNA testing in 2017 proved the warrior was actually a woman, many scholars resisted the finding and suggested the bones must have been mixed up. This same bias led researchers to assume that prehistoric cave paintings were the work of men, until analysis of the handprints revealed that most were done by women.

Language serves as one of the most powerful tools for maintaining this invisibility. Many people believe that terms like man or he can be used generically to include everyone. However, decades of research show that the generic masculine is not actually read as neutral. When people hear these terms, they are far more likely to visualize men, recall famous men, and even suggest men for jobs. In languages like Spanish or French, where a group of a hundred women becomes masculine the moment a single man enters the room, the male default is woven into the very structure of thought.

The digital world and our public spaces are not immune to these old habits. Emojis were almost exclusively male for years, and phone manufacturers almost always designed gender-neutral codes as men. In the United Kingdom, there are more statues of men named John than there are of historical, non-royal women. When women are not specifically marked as female, they simply disappear from the narrative, creating a data gap with life-altering consequences.

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About the author

Caroline Criado Pérez

Caroline Criado Pérez is a British journalist, author, and award-winning feminist campaigner who exposes systemic gender biases. Her successful campaigns include advocating for female representation on British banknotes, pushing for the first statue of a woman in Parliament Square, and getting Twitter to improve its abuse reporting procedures. Appointed an OBE for her services to equality, she is a prominent voice on the gender data gap and its impact on women's lives.

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