Peter Drucker suggested the transformation into a post-modern world happened between 1937 and 1957 (when he was writing). He described an as yet "nameless era" which he characterized as a shift to conceptual world based on pattern, purpose, and process rather than mechanical cause, outlined by four new realities: the emergence of Educated Society, the importance of international development, the decline of the nation state, and the collapse of the viability of non-Western cultures

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I think of the postmodern attitude as that of a man who loves a very cultivated woman and knows that he cannot say to her "I love you madly", because he knows that she knows (and that she knows he knows) that these words have already been written by Barbara Cartland. Still there is a solution. He can say "As Barbara Cartland would put it, I love you madly". At this point, having avoided false innocence, having said clearly it is no longer possible to talk innocently, he will nevertheless say what he wanted to say to the woman: that he loves her in an age of lost innocence.
Umberto Eco
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