Book excerpt: Sometimes called the “literature of ideas,” science fiction is a natural medium for normative political philosophy. Science fiction’s focus on technology, space and time travel, non-human lifeforms, and parallel universes cannot help but invoke the perennial questions of political life, including the nature of a just social order and who should rule; freedom, free will, and autonomy; and the advantages and disadvantages of progress. Rather than offering a reading of a work inspired by a particular thinker or tradition, each chapter presents a careful reading of a classic or contemporary work in the genre (a novel, short story, film, or television series) to illustrate and explore the themes and concepts of political philosophy.