John Barnes is an American science fiction author known for his thought-provoking and socially conscious works. His novels often explore themes of individual moral responsibility and the effects of globalization on isolated societies. Notable series include the Thousand Cultures series, starting with A Million Open Doors, and the Daybreak series, which delves into apocalyptic scenarios. Barnes has also written standalone novels like Mother of Storms and One for the Morning Glory. His writing combines imaginative storytelling with deep social commentary.