This paper argues that technology is no longer merely a tool for man's use but has become the environment in which man undergoes modifications. The author traces the role of technology from the Greeks to the present day. For the Greeks, Nature was governed by necessity and therefore unchangeable whereas in the Judeo-Christian tradition, nature was entrusted to man for him to dominate. Modern science studies the world in order to manipulate and dominate nature through the use of technology which has now become an end in itself, governing the solution of political problems and confronting us with problems beyond our competence to resolve. The ethical impact of technology has been to create a change from ‘acting’ which assumes responsibility for one's actions to ‘doing’ which is concerned only with the effective execution of a ‘job’ without concern for the wider consequences. It can no longer be argued that technology is good or bad according to the use we make of it since technology now makes use of us and thus transforms our ethics, social relationships and psychological being.