Johnson: Also, there’s a related myth—that innovation comes primarily from the profit motive, from the competitive pressures of a market society. If you look at history, innovation doesn’t come just from giving people incentives; it comes from creating environments where their ideas can connect.

Kelly: The musician Brian Eno invented a wonderful word to describe this phenomenon: scenius. We normally think of innovators as independent geniuses, but Eno’s point is that innovation comes from social scenes,from passionate and connected groups of people.

Johnson: At the end of my book, I try to look at that phenomenon systematically. I took roughly 200 crucial innovations from the post-Gutenberg era and figured out how many of them came from individual entrepreneurs or private companies and how many from collaborative networks working outside the market. It turns out that the lone genius entrepreneur has always been a rarity—there’s far more innovation coming out of open, nonmarket networks than we tend to assume.

Kelly: Really, we should think of ideas as connections,in our brains and among people. Ideas aren’t self-contained things; they’re more like ecologies and networks. They travel in clusters.

Johnson: Exactly. And that, by the way, is also a fantastic example of how ideas work. After you’d read a galley of my book, you emailed me and wrote, “It’s a book about why ideas are networks.”