This book, first published in 1870, is the first known feminist utopian novel written by a woman. It comprises nine dreams experienced by a first-person female narrator, in which she imagines a future world where traditional gender roles are reversed. In the first seven dreams, she visits the planet Mars, finding a society where men are oppressed and women are in power. The narrator witnesses the struggle of the men on Mars for equality, and the ways in which they are oppressed by the women. In the last two dreams, the narrator visits a future United States ruled by a woman president, where women have achieved full equality with men.