A very good book that was excellently read by the author. It gives a quick history of the people and technologies (canals, roads, telegraphs, railways, telephones, radios, highways, and television) that have connected the peoples of the USA. This point of view gives an interesting angle from which to comprehend the historical development of the USA, and complements well Schama's book on the USA, "American Futures" (at least among popular histories).
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The Men Who United the States