Le Guin's interest in Taoism influenced much of her science fiction work. According to academic Douglas Barbour, the fiction of the Hainish universe (the setting for several of Le Guin's works) contain a theme of balance between light and darkness, a central theme of Taoism. She was also influenced by her early interest in mythology, and her exposure to cultural diversity as a child. Her protagonists are frequently interested in the cultures they are investigating, and are motivated to preserve them rather than conquer them. Authors who influenced Le Guin include Victor Hugo, Leo Tolstoy, Virginia Woolf, Italo Calvino, and Lao Tzu.
