When getting on for half a lifetime has been spent in one conception of order, reorientation is no five-minute business. Looking back at the shape of things then, the amount we did not know and did not care to know about our daily lives is not only astonishing, but somehow a bit shocking. I knew practically nothing, for instance, of such ordinary things as how my food reached me, where the fresh water came from, how the clothes I wore were woven and made, how the drainage of cities kept them healthy. Our life had become a complexity of specialists all attending to their own jobs with more or
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