Sex Is A Spectrum

In Sex is A Spectrum (Princeton University Press), Fuentes challenges the traditional binary view of sex, instead offering a dynamic new framework grounded in both biology and culture. With examples and case studies from across the animal kingdom, the fossil record, and contemporary human societies, Fuentes reveals a stunning diversity and overlap in sex, gender, and social roles. This book engages with current debates in science, medicine, and athletics, with Fuentes arguing that while differences between biological males and females may exist, these distinctions aren’t as simple as we think. Provocative and accessible, this is a compelling case for understanding sex as a spectrum and for embracing the beautiful complexity of what it means to be human. 

Paw in print

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An inside look up the inside of a building, with four floors and a dinosaur skeleton visible.
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April 2026

Inside the new ES and SEAS complex; kudos for austerity; jazz at Princeton.