
On the Meaning of Sex is a sweeping, point-by-point tour through a fast-changing public idea: that sex isn’t rooted in the body but in identity. Drawing on science, history, policy, and testimonies, Kajsa Ekis Ekman argues that this shift—rolled out through schools, clinics, courts, and corporations—repackages old gender stereotypes, reframes biological sex as negotiable, and exposes vulnerable people to new risks. From the revival of brain-sex theories to the spread of self-ID laws, from the surge of teen medicalization to the erasure of the word “woman,” she examines how an ideology can look compassionate on the surface and still produce unintended harm. Clear, provocative, and meticulously sourced, this book invites listeners to slow down, think carefully, and ask: who benefits, who pays, and what kind of equality do we want to build?