There is a line of argument that says that most growth comes from innovation. While some of it surely does, I think interconnectedness is much more important. It's sad this just turns into ideas having sex in the article. But then again lots of stuff is important in how inter-human relations develop over time. It's foolish to obsessively attribute much of the growth of the economy to one thing.
For a scatterbrained, but much more interesting and less dogmatic, rethinking of economics theory I recommend Origin of Wealth by Eric D. Beinhocker.