PBS NewsHour

Searching for the ripple effects of history-making tech

Clip: 10/15/2014 | 7m 25s

In the new book and PBS series “How We Got to Now,” Steven Johnson presents six game-changing innovations and how they shaped the modern world. Hari Sreenivasan talks to Johnson about surprising connections between invention and American society.

Aired: 10/15/14

Rating: NR

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