After London; or, Wild England (1885) by Richard Jefferies is a dystopian novel that indeed envisions a future in which urban civilization has collapsed following an unspecified environmental disaster. The book is divided into two parts: "The Relapse into Barbarism," which describes the environmental and societal breakdown, and "Wild England," which follows the adventures of a protagonist navigating this transformed, medieval-like world. The novel paints a vivid picture of how nature reclaims the land, and society regresses to a feudal state, highlighting themes of nature, civilization, and survival.

John Richard Jefferies (6 November 1848 - 14 August 1887) was an English nature writer, noted for his depiction of English rural life in essays, books of natural history, and novels.