Being human entails an astonishingly complex interplay of biology and culture, and while there are important differences between women and men, there is a lot more variation and overlap than we may realize. Sex Is a Spectrum offers a bold new paradigm for understanding the biology of sex, drawing on the latest science to explain why the binary view of the sexes is fundamentally flawed鈥攁nd why having XX or XY chromosomes isn鈥檛 as conclusive as some would have us believe.
In this lively and provocative book, leading biological anthropologist Agust铆n Fuentes begins by tracing the origin and evolution of sex, describing the many ways in the animal kingdom of being female, male, or both. Turning to humans, he presents compelling evidence from the fossil and archaeological record that attests to the diversity of our ancestors鈥� sexual bonds, gender roles, and family and community structures, and shows how the same holds true in the lived experiences of people today. Fuentes tackles hot-button debates around sports and medicine, explaining why we can acknowledge that females and males are not the same while also embracing a biocultural reality where none of us fits neatly into only one of two categories.
Bringing clarity and reason to a contentious issue, Sex Is a Spectrum shares a scientist鈥檚 perspective on why a binary view of sex and gender is not only misguided but harmful, and why there are multitudes of ways of being human.
Awards and Recognition
- A Nature Best Book of the Year
"In clear, accessible language, Agust铆n Fuentes has written The Book explaining the expansiveness of human biology based on scientific evidence and biocultural reality."鈥擪arla J. Strand, Ms. Magazine
"At its heart, Sex Is a Spectrum is not an argument against difference. It is a celebration of diversity鈥攐f the subtle, shifting, and beautifully complicated ways we inhabit our bodies and our identities. It doesn鈥檛 ask us to reject biology, but to embrace it in its fullest, most generous form. Fuentes has given us more than a book. He鈥檚 offered a lens鈥攁 way to see ourselves more clearly, and each other more kindly."鈥擫ixing Sun, Psychology Today
"Fuentes does a good job of summarizing what we know about the evolution of sex.... Sex Is a Spectrum will be important for introducing a wide readership to the nuances of scientific understandings of variability in sex and of the biocultural constitution of humans... there is much for biologists to appreciate in the book as well."鈥擬alin Ah-King, Science
"Reproductive anatomy is more variable than commonly understood, according to this eye-opening study....The raft of research convincingly debunks the idea that sex anatomy has much consequence on behavior, character, or cognitive ability...and the illuminating discussions of animal biology demonstrate the profound diversity of sex expression in nature.... [Sex Is a Spectrum is] a resounding refutation of the idea that there’s anything natural about the gender binary."鈥�Publishers Weekly
"Fuentes . . . flexes his considerable powers of communication to lay out the argument that human gender cannot be understand as binary. . . . [Sex Is a Spectrum] is a highly readable popular science investigation of sex and gender, rich with 'did you know' moments for those who love the extraordinariness of nature and human bodies."鈥�Library Journal
"A timely cri de coeur that seeks to reset the distorted and politicised public discourse about the biology of sex and gender. The book is a zingy, concise exposition of the variation in sexual forms and systems found in the animal world....Fuentes respectfully explains science in plain language to a wider public, presents biological knowledge as one among many sources of sense-making about the world, and recognises biomedical scientists’ responsibility to respond to harmful deployments of inaccurate, overly simplistic, and reductionist science by those attempting to naturalise and depoliticise their hateful views. This interdisciplinary, scientist-humanist voice is vital in our time."鈥擲arah Richardson, The Lancet
"A timely and valuable contribution. [Sex Is a Spectrum] synthesizes research from biology and biological anthropology to argue that from a biological perspective, sex is not binary (male/female) and to assume so is not only bad science but also harmful. The book's strengths include its grounding in evolution and comparative biology, as well as its extensive references to the most recent research on this topic."鈥�American Journal of Human Biology
"[Sex Is a Spectrum is] bursting with biological complexities, entering into a debate that many...want to inflame with the use of broad brushstrokes."鈥擩avier Salas, El Pa铆s
"For Fuentes, human behaviours and concepts are shaped by biology and culture. We are diverse as a result; when that diversity is ignored it narrows our ability to understand ourselves....The onus is on all who wish to take part in the sex-gender debate to be reminded of what is fact and what is conjecture. [Sex Is a Spectrum provides] the facts."鈥擜nna Machin, Times Literary Supplement
"[A] fascinating book."鈥擜ndrew Robinson, Nature
"This is a beautifully understandable book that should be on the reading list of every individual interested in the current discourse regarding gender and sex biology. . . . Sex Is a Spectrum is both concise and direct, and Fuentes provides ample documentation for the research he quotes and relies on. His accessible text serves as a valuable resource for navigating the frequently confusing and confounding public conversations surrounding gender issues."鈥�Choice
鈥淭here has been an outpouring of new research on the nonbinary nature of sex and gender, both in humans and in nonhuman animals. Agust铆n Fuentes has put it all together in a readable and up-to-date narrative. Sex Is a Spectrum will help us move past the sex/gender binary and allow us to understand and embrace human diversity.鈥�鈥擜nne Fausto-Sterling, author of Sexing the Body: Gender Politics and the Construction of Sexuality
鈥淎gust铆n Fuentes is a pedigreed and fearless thinker with a talent for carefully debunking cultural myths using hard facts and ruthless logic. Through a litany of research and great storytelling, he explains how the unique biocultural nature of humans makes binary expectations of our sex biology problematic. A fascinating must-read for anyone interested in the science of human sex and gender.鈥�鈥擫ucy Cooke, author of Bitch: On the Female of the Species
鈥淚nvaluable in our era of culture wars, Sex Is a Spectrum shows in clear, accessible language how sex biology is far from a simple binary. Fuentes demonstrates how humans fit into an array of wonderful and often surprising animal sex and reproductive diversity while also highlighting what makes us unique. The result is a fascinating, informative exploration of how people experience the dynamic intersections between bodies, minds, and culture.鈥�鈥擱ebecca Wragg Sykes, author of Kindred: Neanderthal Life, Love, Death, and Art
鈥淭he fact that sex is complicated isn鈥檛 weird. It鈥檚 weird to think it wouldn鈥檛 be. A lively introduction to the topic from a scientist who鈥檚 a force for good.鈥�鈥擟at Bohannon, author of Eve: How the Female Body Drove 200 Million Years of Human Evolution
