Before the 1500-2000s there were far more people with gender-diverse identities than even now (per capita). Dozens of major civilizations had official multi-gender class systems. Both gender diverse people as well as different ideas about what makes a man and woman were far more common sites for the world traveler. The reasons[1] for the relative recent decrease are well known. There has been a "war on gender" for the last 500 years and just now humanity is healing.

[1]https://www.denverartmuseum.org/en/object/2000.371