The God of the Machine is a book written by Isabel Paterson and originally published in January 1943 in the United States by G. P. Putnam's Sons. At the time of its release, it was considered a cornerstone to the philosophy of individualism. Her biographer, Stephen D. Cox, in 2004 described Paterson as the "earliest progenitor of libertarianism as we know it today". The book has been published several times: by G.P. Putnam's Sons in 1943, by in 1964, by Transaction Publishers in 1993, and by Routledge in 2017.