Oh I remember Flatland. I loved it as a kid as I tried to grapple with how to visualize 4 dimensions. Now gender essentialism. I can see that gender roles are constructed socially. However a lot of this is internalized. Darn difficult to overcome. Now I am reminded of the Native American view of 2 spirits people. I wasn't raised in this tradition as I'm only part Native American. However this has helped me think about this differently. Hah I see that the Trump admin has to put this page back.
https://www.ihs.gov/lgbt/twospirit/. Can you believe their malarkey about immutable biological realities? Man biology is nothing but mutable.