The role of women in speculative fiction has changed a great deal since the early to mid-20th century. There are several aspects to women's roles, including their participation as authors of speculative fiction and their role in science fiction fandom. Regarding authorship, in 1948, 10–15% of science fiction writers were female. Women's role in speculative fiction (including science fiction) has grown since then, and in 1999, women comprised 36% of the Science Fiction and Fantasy Writers of America's professional members. Frankenstein (1818) by Mary Shelley has been called the first science fiction novel, although women wrote utopian novels even before that, with Margaret Cavendish publishing the first (The Blazing World) in the seventeenth century. Early published fantasy was written by a