Marion Eleanor Zimmer Bradley (1930-1999) was an American author recognized for her contributions to fantasy, historical fantasy, science fiction, and science fantasy genres. She is widely known for her Arthurian novel "The Mists of Avalon" and the expansive "Darkover" series. Bradley's writing often focused on female perspectives, a less common approach in sword and sorcery fantasy at the time. She began writing in her teens and later earned a degree from Hardin-Simmons University. She was also a co-founder of the Society for Creative Anachronism and edited the "Sword and Sorceress" anthology series, which provided a platform for emerging fantasy authors, particularly women.

While popular during her life, Bradley's reputation was significantly impacted by allegations made by her daughter in 2014. These claims included accusations of sexual abuse by Bradley herself, and that she had enabled her second husband, Walter Breen, a convicted child abuser, in his own abusive conduct. These revelations led to public condemnation from many in the science fiction community. Despite these controversies, she received a posthumous World Fantasy Award for lifetime achievement in 2000.

Marion Zimmer Bradley carved a significant niche in speculative fiction, particularly with her creation of the "Darkover" universe, a science fantasy setting depicting a lost human colony where psionic abilities evolved to resemble magic amid technological regression. Her most celebrated work, "The Mists of Avalon," offered a feminist retelling of Arthurian legend, centering the narrative on female characters like Morgaine and Gwenhwyfar. Throughout her career, Bradley championed female perspectives in fantasy, a notable departure from the prevailing male-dominated narratives in the genre. She actively encouraged new writers, especially women, through her editorship of the "Sword and Sorceress" anthology series, providing a crucial platform for many emerging talents.

Beyond her published works, Bradley was an active participant in science fiction and fantasy fandom. In her youth, she engaged with the genre through letters to pulp magazines and by publishing her own fanzines such as "Astra's Tower" and "Day*Star." She was instrumental in the founding of the Society for Creative Anachronism in 1966, even coining the group's name. Bradley also fostered a strong connection with her "Darkover" readership, initially encouraging fan fiction and even reprinting fan-created stories in commercial anthologies. While this relationship later soured due to a dispute over intellectual property, her early efforts significantly contributed to the interactive nature of the genre's community.

Bradley's legacy has been significantly complicated by serious allegations of child sexual abuse. In 2014, her daughter, Moira Greyland, publicly accused Bradley of abuse spanning several years. Greyland also corroborated earlier claims that Bradley was aware of, and did not report, the extensive child sexual abuse perpetrated by her second husband, Walter Breen. These revelations led to widespread condemnation within the literary community. Despite these posthumous controversies, Bradley had been recognized with a World Fantasy Award for lifetime achievement in 2000.