Children of the Lens by E.E. Smith

Helen's story was short and bitter. Human or near-human Boskonians came to Lyrane II and spread insidious propaganda all over the planet. Lyranian matriarchy should abandon its policy of isolationism. Matriarchs were the highest type of life. Matriarchy was the most perfect of all existing forms of government -- why keep on confining it to one small planet, when it should by right be ruling the entire Galaxy? The way things were, there was only one Elder Person; all other Lyranians, even though better qualified than the then incumbent, were nothing -- and so on. Whereas, if things were as they should be, each individual Lyranian person could be and would be the Elder Person of a planet at least, and perhaps of an entire solar system -- and so on. And the visitors, who, they insisted, were no more males than the Lyranian persons were females, would teach them. They would be amazed at how easily, under Boskonian guidance, this program could be put into effect.

Helen fought the intruders with every jet she had. She despised the males of her own race; she detested those of all others. Believing that hers was the only existing matriarchal race, especially since neither Kinnison nor the Boskonians seemed to know of any other, she was sure that any prolonged contact with other cultures would result, not in the triumph of matriarchy, but in its fall. She not only voiced these beliefs as she held them -- violently -- but also acted upon them in the same fashion.