The Other Big Bang: The Story of Sex and Its Human Legacy

by Eric S. Haag

Sex shapes who we are as individuals and as a species. Where in the mists of time did something so important—and eye-catching—originate, and what does this history tell us about ourselves? Why do we have sex, and sexes, at all?

In The Other Big Bang, the evolutionary and developmental biologist Eric S. Haag explores the two-billion-year history of sex, from the first organisms on Earth to contemporary humans. He delves into the deep history of sexual reproduction, from its origins as a fix for a mutational crisis to an essential feature of all complex life. Haag traces sexual differentiation from its earliest forms in microbes to its elaboration in animals, showing why sex differences in cells and organisms help species adapt, persist, and evolve. Humanity’s clear sexual kinship with yeast and clams exists even as we evolved differences that distinguish us from other mammals, and even other apes.

Bringing the story up to the present, Haag argues that the evolutionary history of human sexuality helps us better understand contemporary society. Our ancient male-female sexual system remains an important fact of life, even as we see increasingly diverse sexual orientations, gender expressions, and parenthood choices. Witty and inviting, The Other Big Bang offers a clear view of the evolutionary roots of human sexuality and their significance today.

304 pages, Hardcover

Published December 3, 2024

Reviews

[Maher Razouk · Rating 5 out of 5]

لماذا يحدث انقطاع الطمث وتصل النساء إلى سن اليأس ، إذا علمنا أن العديد منهن يعشن لأربعة عقود بعد انقطاعه، وأن الرجال لا يعانون عموماً من فقدان مماثل للقدرة الإنجابية؟

هل انقطاع الطمث تكيف يتشكل من خلال الانتقاء الطبيعي أم نتيجة غير متماسكة لديناميكية أخرى؟

إن عدم القدرة على الولادة بينما لا تزال هناك حيوية كبيرة متبقية يضمن أن آخر نسل تلده المرأة، والذي يحتاج إلى أكثر من خمسة عشر عاماً من الرعاية أو أكثر، سيتم الاعتناء به حتى يبلغ سن النضج. وهذا رهان أفضل من إنجاب الأطفال قبل الموت بفترة وجيزة، والذين من المرجح أن يموتوا أيضاً (بلا رعاية). ويمكن أيضاً تمديد هذه الفائدة إلى الجدات ــ فمساعدة المرء لأطفاله على تربية أطفالهم هي قاعدة في جميع أنحاء العالم.
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Eric S. Haag
The Other Bing Bang Theory
Translated By #Maher_Razouk

[Adam Carter · Rating 3 out of 5]

Eric Haag’s The Other Big Bang tackles one of the most perplexing mysteries in biology: the origins and evolution of sexual reproduction. Why do so many animals bother with sex when asexual reproduction—cloning oneself—seems like the far simpler and more efficient strategy?

The book’s first part is full of interesting insights. Haag unpacks the pressures faced by early eukaryotes, the ancestors of modern complex life, and how those pressures likely gave rise to sexual reproduction. He considers the evolutionary puzzle of why early hermaphrodites gave way to distinct male and female sexes, and why mammals abandoned egg-laying in favor of pregnancy—a shift that created profound challenges for mothers.

The second half of the book pivots to human sex development, gender norms, and sexuality. While Haag’s approach is thoughtful, this section treads more familiar ground. The discussion is balanced and engaging but offers little that hasn’t already been explored in contemporary debates on human biology and gender diversity.

Overall, The Other Big Bang is a thought-provoking dive into the ancient history of sex and the forces that shaped it. However, Haag’s pacing can feel uneven, with some explanations lingering too long and others breezing past key ideas. Even so, readers intrigued by the deep evolutionary roots of sex will find much to ponder in this wide-ranging work.

[Andrea Wenger · Rating 4 out of 5]

Uncover the two-billion-year history of sex, from its origins in early organisms to its impact on modern humanity. This book explores the evolution of sexual reproduction, sexual differentiation, and the enduring influence of our ancient sexual systems on contemporary society, even amid evolving gender expressions and sexual orientations. Interesting, thorough, and informative, this book is a good overview for a professional and a lay audience.

Thanks, NetGalley, for the ARC I received. This is my honest and voluntary review.

[Maggie Shideler]

Not a huge fan. The first half was very biology-heavy. Some parts were interesting, but most of it I skimmed. Then he really lost me in the second half. The author is fundamentally an evolutionary biologist, but he claims that he can use evolutionary biology to answer huge social issues (e.g., patriarchy, queer/trans issues, etc.) Had some HOT TAKES about why queer and trans people exist and somewhat alluded to the fact that some of trans people aren't really trans and lowkey advocated for conversion therapy.

Read for Columbia Alumni Event.

[Mark Wimer · Rating 4 out of 5]

I recommend the paper not audible version just because you’ll want to go back and re-read parts to let it sink in. I listened to it and for whatever reason it felt a little like being pelted with facts (the emphasis added by the narrator didn’t match how I would have read it). But I still enjoyed it and learned a lot. If you’re worried about too much detail - each chapter has a useful synopsis AT THE START which was helpful. Great fodder for discussion of sex and gender topics.