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August 7, 2009 by George Eberstadt

Most of the books I “read” these days are audio books.  Last year, that included Charlene Li and Josh Bernoff’s excellent Groundswell.  (Here it is on Audible.)  As a result, I missed this extraordinary chart, and just discovered it today.  So it’s not exactly breaking news.  But even if you’ve seen it before, it’s worth a second look.