A ground-breaking look at gender and sex from the world's leading primatologist and New York Times bestselling author of Are We Smart Enough To Know How Smart Animals Are?

'Brilliant and fascinating... brings a scientific, compassionate and balanced approach to some of the hottest controversies about sex and gender' Yuval Noah Harari, author of Sapiens, Homo Deus and 21 Lessons for the 21st Century

How different are the sexes? Is gender uniquely human? Where does gender identity originate?

Dr...

'A profoundly illuminating book on humans by a great primatologist' John Gray, author of Straw Dogs