A Dream of John Ball and A King's Lesson is a novel by English author William Morris about the English peasants' revolt of 1381. It features the rebel priest John Ball, who appeared to be advocating a socialistic philosophy in advance of his time. John Ball is famed for his question "When Adam delved and Eve span, who was then the gentleman?" The novel describes a dream and time travel encounter between the medieval and modern worlds, thus contrasting the ethics of medieval and contemporary culture. A time-traveller tells Ball of the decline of feudalism and the rise of the Industrial Revolution. Ball realizes that in the nineteenth century his hopes for an egalitarian society have yet to be fulfilled.

William Morris (24 March 1834 – 3 October 1896) was an English textile designer, poet, novelist, translator, and socialist activist. Associated with the British Arts and Crafts Movement, he was a major contributor to the revival of traditional British textile arts and methods of production. His literary contributions helped to establish the modern fantasy genre, while he played a significant role in propagating the early socialist movement in Britain. Morris is recognised as one of the most significant cultural figures of Victorian Britain; though best known in his lifetime as a poet, he posthumously became better known for his designs. Founded in 1955, the William Morris Society is devoted to his legacy, while multiple biographies and studies of his work have seen publication.