A city-state is an independent or autonomous entity whose territory consists of a city which is not administered as a part of another local government. A city-state can also be defined as a central city and its surrounding villages, which together follow the same law, have one form of government, and share languages, religious beliefs, and ways of life.

Historical examples include the oldest known Sumerian cities of Mesopotamia and Ur, the Phoenician cities of Canaan (such as Tyre and Sidon), the Berber city-states of the Garamantes, the city-states of ancient Greece (the poleis such as Athens, Sparta, Thebes, and Corinth), the Roman Republic which grew from a city-state into a great power, the Maya of pre-Columbian Mesoamerica (including sites such as Chichen Itza and El Mirador), the central Asian cities along the Silk Road, Venice, Croatian city-state of Ragusa (Dubrovnik) and many others. The Viking colonial cities in medieval Ireland, most importantly Dublin, have recently been classed as genuine city-states.

Michael Bruce Sterling (born April 14, 1954) is an American science fiction author, best known for his novels and his work on the Mirrorshades anthology, which helped define the cyberpunk genre.

Sterling is, along with William Gibson, Rudy Rucker, John Shirley, Lewis Shiner, and Pat Cadigan, one of the founders of the cyberpunk movement in science fiction, as well as its chief ideological promulgator, and one whose polemics on the topic earned him the nickname "Chairman Bruce". He was also one of the first organizers of the Turkey City Writer's Workshop, and is a frequent attendee at the Sycamore Hill Writer's Workshop. He won Hugo Awards for his novelettes Bicycle Repairman and Taklamakan.

His first novel, Involution Ocean, published in 1977, features the world Nullaqua where all the atmosphere is contained in a single, miles-deep crater; the story concerns a ship sailing on the ocean of dust at the bottom, which hunts creatures called dustwhales that live beneath the surface. It is partially a science-fictional pastiche of Moby-Dick by Herman Melville.