WINNER OF THE 2017 ROYAL SOCIETY INSIGHT INVESTMENT SCIENCE BOOK PRIZE

What the judges said: ‘Every man and woman should read this book on gender bias . . . an important, yet wickedly witty, book.’

Testosterone Rex is the powerful myth that squashes hopes of sex equality by telling us that men and women have evolved different natures. Fixed in an ancestral past that rewarded competitive men and caring women, these differences are supposedly re-created in each generation by sex hormones and male and female brains.

Testosterone, so we’re told, is the very essence of masculinity, and biological sex is a fundamental force in our development. Not so, says psychologist Cordelia Fine, who shows, with wit and panache, that sex doesn’t create male and female natures. Instead, sex, hormones, culture and evolution work together in ways that make past and present gender dynamics only a serving suggestion for the future – not a recipe.

Testosterone Rex brings together evolutionary science, psychology, neuroscience and social history to move beyond old ‘nature versus nurture’ debates, and to explain why it’s time to unmake the tyrannical myth of Testosterone Rex. This is an upbeat, timely and important contribution to the debate about gender in society.