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Steven Johnson on Six Innovations that Shaped the Modern World

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 (Courtesy of Nutopia Ltd.)

According to writer Steven Johnson, some of today's most impressive technologies owe their origin to simple innovations dating all the way back to the 12th and 13th centuries. For example, the invention of glass helped lead to eyeglasses, telescopes and even the circuit boards found in computers today. Without the invention of glass, he argues, Silicon Valley might not exist. In his new book and PBS series, "How We Got to Now," Steven Johnson explores six innovations and how they shaped our world today.


Steven Johnson, author of "How We Got to Now: Six Innovations that Made the Modern World" and the host of the new PBS series by the same title, which airs starting Oct. 15; also the author of "Where Good Ideas Come From."