Hughes' book, an exhaustive study of electrification from 1880 to 1930, primarily focuses on the development of electric grids in the United States, Great Britain, and Germany. Hughes is primarily concerned with working out a complex conceptual framework for understanding technology as system. He characterizes electrical systems as fundamentally constituted not only of interconnected technological artifacts (generators, couplers, relays, lamps) but also local, regional, and national political structures, perceived (and manufactured) societal need, geographical features, etc. The form that electric grids take is not determined by internal (mechanical or scientific) necessity, but by external social factors. Thus the electric grid developed very differently depending upon the structures of the local governments that had jurisdiction over them...
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