Simulacra and Simulation (Simulacres et Simulation in French) is a philosophical treatise by Jean Baudrillard that discusses the interaction between reality, symbols and society.
Simulacra and Simulation is most known for its discussion of images, signs, and how they relate to the present day. Baudrillard claims that modern society has replaced all reality and meaning with symbols and signs, and that the human experience is of a simulation of reality rather than reality itself. The simulacra that Baudrillard refers to are signs of culture and media that create the perceived reality.
A specific analogy that Baudrillard uses is a fable derived from On Exactitude in Science by Jorge Luis Borges. In it, a great Empire created a map that was so detailed it was as large as the Empire itself. The actual map grew and decayed as the Empire itself conquered or lost territory. When the Empire crumbled, all that was left was the map. In Baudrillard's rendition, it is the map that people live...
