six degrees of the mathematician Paul Erdös, himself a pioneer of network theory, as we have seen.13 Recent research suggests the number is now closer to five than six, which suggests that technological change since the 1970s has perhaps been less transformative than is commonly supposed.14 For the directors of Fortune 1000 companies, however, it is 4.6.15 For Facebook users it was 3.74 in 2012,16 and just 3.57 in 2016.
( Niall Ferguson )
[ The Square and the Tower: ]
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