: The mid-20th century saw the development of "gender" as a category distinct from biological sex.
: Many Indigenous cultures, such as the Two-Spirit people of North America or the Hijra in South Asia, have long-standing traditions that recognize gender identities beyond a binary. Early 20th Century Transitions
The early 1900s marked a shift as medical and psychological fields began to formalize the study of gender.
: In the 1950s, Christine Jorgensen became the first person to achieve widespread fame in the U.S. for her sex reassignment surgery, bringing transgender issues into the public consciousness. The Fight for Rights and Visibility