Certeau on "strategy"

"I call a 'strategy' the calculus of force-relationships which becomes possible when a subject of will and power (a proprietor, an enterprise, a city, a scientific institution) can be isolated from an "environment." A strategy assumes a place that can be circumscribed as proper and thus serve as the basis for generating relations with an exterior distinct from it (competitors, adversaries, 'clienteles,' 'targets,' or 'objects' of research. Political, economic, and scientific rationality has been constructed on this strategic model." - Michel de Certeau, "General Introduction," The Practice of Everyday Life, University of California Press, 1988, page xix.