John Zerzan (born 1943) is an American anarchist and primitivist philosopher and author. His works criticize agricultural civilization as inherently oppressive, and advocate drawing upon the ways of life of prehistoric humans as an inspiration for what a free society should look like. Some of his criticism has extended as far as challenging domestication, language, symbolic thought (such as mathematics and art) and the concept of time. His five major books are Elements of Refusal (1988), Future Primitive and Other Essays (1994), Running on Emptiness (2002), Against Civilization: Readings and Reflections (2005) and Twilight of the Machines (2008).