Among the many divisive topics animating people these days, sex and gender are perhaps the most incendiary. This is in large part because not one but two groups feel that their political identities are at stake. On one hand, many women feel blindsided by the argument that trans women should be considered literal women, and question the effect of the trans movement on female sex-based rights and protections, as they have come to define them. On the other, many trans people are aghast at what they feel are attempts to block their political advancement toward equal social and legal status. Whether the arenas of dispute are bathrooms, schools, sport, women’s organizations, or parades, the emotions are intense and the arguments apparently intractable. To understand what’s at stake, it’s helpful to delineate two argumentative positions at play: (1) sex eliminationism, which argues for the abolition of the recognition of biological sex as a meaningful category; and (2) gender eliminationism, which argues for the abolition of gender. As a feminist and philosopher who finds herself stuck between …