Stonewall itself—when patrons of the Stonewall Inn resisted a police raid—was led by Marsha P. Johnson (a self-identified transvestite and gay liberation activist) and Sylvia Rivera (a Latina trans woman and co-founder of STAR—Street Transvestite Action Revolutionaries). Yet, as the Gay Liberation Front (GLF) and Gay Activists Alliance (GAA) formed, they increasingly sidelined trans issues, viewing them as “freakish” or detrimental to the goal of showing homosexuals as “normal.” Rivera’s famous 1973 speech at a gay pride rally in New York—where she was booed offstage for demanding inclusion of drag queens and trans people—epitomized this early fracture.

Academic queer theory, emerging from figures like Judith Butler (Gender Trouble, 1990), initially centered on the performativity of gender. While Butler’s work opened space for gender fluidity, early queer studies often treated “transgender” as a metaphor for subversion rather than a lived material reality. Trans scholars like Sandy Stone (in “The Empire Strikes Back,” 1987) and Susan Stryker (in “My Words to Victor Frankenstein,” 1994) pushed back, insisting that trans experience is not a postmodern plaything but a site of embodied knowledge.

Before the term “LGBT” was coined, gender diversity was often conflated with homosexuality in the medical and popular imagination. In the early 20th century, European sexologists like Magnus Hirschfeld (who himself was a gay Jewish trans advocate) used the term “transvestite” to describe people who cross-dressed, some of whom would today identify as transgender. Hirschfeld’s Institute for Sexual Science in Berlin was a haven for gender-nonconforming people until its destruction by Nazis in 1933.

Furthermore, the transgender critique has destabilized the “L” and “G” of LGBTQ. If a trans woman loves a cisgender woman, is that a lesbian relationship? According to trans-affirming frameworks, yes—based on gender identity, not birth assignment. This forced the gay and lesbian communities to reconsider definitions of sexuality that were rooted in essentialist biology, moving toward a more self-identification-based model.