Foregrounding the work of James Dobson, Joseph Nicolosi, and George Rekers, whose writings toed the lines between psychology, religious moralizing, and political spokesmanship, I investigate how they repurposed what was then a niche sexological term to help articulate the vision of Christian parenting that became central to the religious right’s family values in the late twentieth century. I argue that they developed a conviction that childhood gender nonconforming identity predicted future homosexuality by repurposing sexological uncertainty about gender development and, in doing so, contended that homosexuality could be prevented through correct gender socialization in childhood. Transforming childhood gender into a harbinger of adult sexual disorder, thinkers like Dobson, Nicolosi, and Rekers claimed they could prove homosexuality’s nonbiological origins even after the American Psychological Association declared homosexuality a “natural sexual variant” in 1973. This paper ends by considering the legacy of these developmental arguments in debates over gender nonconforming children today.