"All my early fiction tends to be rather male-centered. A couple of the Earthsea books have no women in them at all or only marginal woman figures. That's how hero stories worked; they were about men. With the exception of just a few feminists like Joanna Russ, science fiction was pretty much male-dominated up to the 1960s. Women who wrote in that field often used pen names."
January 1, 1970
https://en.wikiquote.org/wiki/Joanna_Russ