The hybridizing or compounding of these agents offers an especially favorable opportunity to notice their structural components and properties. "As the silent film cried out for sound so does the sound film cry out for color," wrote Sergei Eisenstein in his Notes of a Film Director. This type of observation can be extended systematically to all media: "As the printing press cried out for nationalism, so did the radio cry out for tribalism" These media, being extensions of ourselves, also depend upon us for their interplay and their evolution. The fact that they do interact and spawn new progeny has been a source of wonder over the ages. It need baffle us no longer if we trouble to scrutinize their action. We can, if we choose, think things out before we put them out. Plato, in all his striving to imagine an ideal training school, failed to notice that Athens was a greater school than any university even he could dream up. In other words, the greatest school had been put out for human use before it has been thought out. Now, this is especially true of our media. They are put out long before they are thought out. In fact, their being put outside us tends to cancel the possibility of their being thought of at all. Everybody notices how coal and steel and cars affect the arrangements of daily existence. In our time, study has finally turned to the medium of language itself as shaping the arrangements of daily life, so that society begins to look like a linguistic echo or repeat of language norms, a fact that has disturbed the Russian Communist party very deeply. Wedded as they are to nineteenth-century industrial technology as the basis of class liberation, nothing could be more subversive of the Marxian dialectic than the idea that linguistic media shape social development, as much as do the means of production. In fact, of all the great hybrid unions that breed furious release of energy and change, there is none to surpass the meeting of literate and oral cultures. The giving to man of an eye for an ear

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