Sally Miller Gearhart
Sally Miller Gearhart (April 15, 1931 – July 14, 2021) was an American feminist. In 1973, she became the first open lesbian to obtain a tenure-track faculty position when she was hired by San Francisco State University, where she helped establish one of the first women and gender study programs in the country.
Gearhart advocated reducing men to 10% of the human population, a position more recently popularised by
"The proportion of men must be reduced to and maintained at approximately 10% of the human race." 
"The Future – If There Is One – Is Female" (essay title; same source)