"Darwin among the Machines" is an article published in The Press newspaper on 13 June 1863 in Christchurch, New Zealand, which references the work of Charles Darwin in the title. Written by Samuel Butler but signed Cellarius (q.v.), the article raised the possibility that machines were a kind of "mechanical life" undergoing constant evolution, and that eventually machines might supplant humans as the dominant species: The article ends by urging that, "War to the death should be instantly proclaimed against them. Every machine of every sort should be destroyed by the well-wisher of his species. Let there be no exceptions made, no quarter shown; let us at once go back to the primeval condition of the race." Book of the Machines Butler developed this and subsequent articles into The Book of the Machines, three chapters of Erewhon, published anonymously in 1872. The Erewhonian society Butler envisioned had long ago undergone a revolution that destroyed most mechanical inventions. The narrator of the story finds a book that details the reasons for this revolution, which he translates for the reader. In chapter xxiii: the book of the machines, a number of quotes from this imaginary book discuss the possibility of machine consciousness: Later, in chapter xxiv: the machines—continued, the imaginary book also discusses the notion that machines can "reproduce" like living organisms: This notion of machine "reproduction" anticipates the later notion of self-replicating machines, although in chapter xxv: the machines—concluded, the imaginary book supposes that while there is a danger that humans will become subservient to machines, the machines will still need humans to assist in their reproduction and maintenance: The author of the imaginary book goes on to say that while life under machine rule might be materially comfortable for humans, the thought of the human race being superseded in the future is just as horrifying to him as the thought that his distant ancestors were anything other than fully human (apparently Butler imagines the author to be an Anti-evolutionist), so he urges that all machines which have been in use for less than 300 years be destroyed to prevent this future from coming to pass: Erewhonian society came to the conclusion "...that the machines were ultimately destined to supplant the race of man, and to become instinct with a vitality as different from, and superior to, that of animals, as animal to vegetable life. So... they made a clean sweep