Today the challenge to urbanists is to develop a vocabulary that can speak to the ongoing process of development rather than its spatial contours at any moment. Similarly, we need terms that will emphasize the new patterns of social and economic interaction that our longstanding preoccupation with proximity and place has obscured. In short, as urban geographers have long maintained, we need to address the temporal as well as the spatial dimensions of the modern city. Doing so will require us to move from definition by negation (de-centered city, non-place urban realm, doughnut) to a new set of positive terms.... Whatever words we employ, field or atom or something as yet unnamed, they will help shape our city, for the kind of metaphors we choose will influence the kind of city we see. As the examples of (FRIEDREICH) ENGELS...show(s), learning how to read the city is a necessary part of learning how to change it. William Sharpe and Leonard Wallach (1987) "From the Great Town to the Non-Place Urban Realm" in Sharpe and Wallach, Eds., Visions of the Modern City. Baltimore: Johns Hopkins University Press. P.38-39.