John Zerzan (born in 1943) is an American anarchist and primitivist philosopher and author. His works speaks about agricultural civilization. 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), "" (2005) and "Twilight of the Machines" (2008). Zerzan is currently one of the editors of "Green Anarchy", a journal of anarcho-primitivist and insurrectionary anarchist thought.