David Reimer Gender Reassignment Case (1966)

The David Reimer case remains the most cited refutation of pure social constructivism in gender identity research. After a botched circumcision destroyed Reimer's penis, psychologist John Money convinced his parents to raise him as a girl named Brenda, using the case to promote the theory that gender identity is entirely learned. Money reported the experiment as a successful female gender acquisition for decades, but Reimer rejected his female identity from childhood, transitioned back to male at 15, and died by suicide at 38. Over 80% of contemporary psychological studies now recognize a strong biological component to gender identity, a complete reversal from Money's era. Reimer's tragic outcome provides the concrete data point of a 100% failure rate for the social construction theory in this single case, cementing the study as a cautionary tale against ideological bias in science.