C. S. Lewis contrasts sex and gender within the narrative of his Space Trilogy, written 70+ years ago:
Out of the Silent Planet
Perelandra
That Hideous Strength
HOW DO YOU PEOPLE KNOW THESE THINGS!!
At least 3 times a day on FR I get to feel like an illiterate!!
But thank you.
I have heard he is one of the good guys when it comes to writers and their views.