In his later work, Heidegger argued that Western history involved a sequence of distinct understandings of being and correspondingly distinct worlds. Dreyfus illustrates several distinct world styles by contrasting Greek, industrial, and technological practices for using equipment. By reading Being and Time in the light of Heidegger’s later concerns with the history of being, Dreyfus shows how Heidegger’s own account of equipment in Being and Time helped set the stage for technology by encouraging an understanding of being that leaves equipment and natural objects open to a technological reorganization of the world into a standing reserve of resources. Seen in the light of the relation of nature and technology revealed by later Heidegger, Being and Time appears in the history of the being of equipment not just as a transition but as the decisive step toward technology.