Single-gender world

A relatively common motif in speculative fiction is the existence of single-gender worlds or single-sex societies. These fictional societies have long been one of the primary ways to explore implications of gender and gender-differences in science fiction and fantasy. In the fictional setting, these societies often arise due to elimination of one gender through war or natural disasters and disease. The societies may be portrayed as utopian or dystopian, as seen in pulp tales of oppressive matriarchies.

There is a long tradition of female-only places in literature and mythology, starting with the Amazons and continuing into some examples of feminist utopias. In speculative fiction, female-only worlds have been imagined to come about, among other approaches, by the action of disease that wipes out men, along with the development of technological or mystical method that allow female parthenogenic reproduction. The resulting society is often shown to be utopian by feminist writers. Several influential feminist utopias of this sort were written in the 1970s; the most often studied examples include Joanna Russ's The Female Man, Suzy McKee Charnas's Walk to the End of the World and Motherlines, and Marge Piercy's Woman on the Edge of Time. Utopias imagined by male authors have generally included equality between sexes, rather than separation. Female-only societies may be seen as an extreme type of a biased sex-ratio, another common SF theme.

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