Many historians still tend to assume that the spread of an idea or an ideology is a function of its inherent content in relation to some vaguely specified context. We must now acknowledge, however, that some ideas go viral because of structural features of the network through which they spread. They are least likely to do so in a hierarchical, top-down network, where horizontal peer-to-peer links are prohibited.
( Niall Ferguson )
[ The Square and the Tower: ]
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