Steven Johnson: Where good ideas come from

People often credit their ideas to individual &quot;Eureka!&quot; moments. But Steven Johnson shows how history tells a different story. His fascinating tour takes us from the &quot;liquid networks&quot; of London’s coffee houses to Charles Darwin’s long, slow hunch to today’s high-velocity web.<br><br>TEDTalks is a daily video podcast of the best talks and performances from the TED Conference, where the world’s leading thinkers