
New Books in Sociology Beans Velocci, "Sex Isn't Real: The Invention of an Incoherent Binary" (Duke UP, 2026)
Apr 11, 2026
Beans Velocci, Assistant Professor at UPenn who studies the history of science and gender, explores how scientific practices invented an unstable male/female split. They trace debates across zoology, eugenics, gynecology, statistics, and trans medicine. Short, provocative takes show how definitions of sex shifted to uphold racial and professional power.
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Biological Sex Acts As An Appeal To Nature
- Biological sex functions culturally as an appeal to nature that projects gender norms onto the natural world.
- Beans Velocci shows the phrase "biological sex" is recent and scientists use it to sidestep social construction arguments, giving claims unwarranted authority.
Foucault Sparked A Personal Turn Toward Trans History
- Velocci recounts reading Foucault as an undergrad and realizing gendered expectations were systemic rather than personal failings.
- That insight helped them understand their own transness and motivated the book despite initial reluctance to do trans history.
Black Feminist History Reveals Sex's Instability
- Velocci combines trans history with Black feminist accounts of the degendering of Black women to challenge binary sex.
- The Frances Thompson case illustrates how accusations about gender were weaponized to discredit Black women broadly, revealing sex's instability.



