"An invention has to make sense in the world it finishes in, not in the world it started. " Tim O'Reilly
Follow the links to read more about how Tim O'Reilly changed the world of computing by starting as a technical manual publisher to being a driving force in Open Source Software and Web 2.0, not necessarily by being the guy with the big idea, but rather being the guy that enabled it to happen.
While hundreds of techies had proven that 'open source' would work, that 'web 2.0' would work, it wasn't really 'happening'. O'Reilly, seeing this, pulled them all together and forced the change by adding structure.
As silly as it may sound, much of that structure was just giving it the name Open Source and Web 2.0, creating a conference, then letting the technical folks at the conference figure out what that really meant.
O'Reilly is a classic example of a way to drive change. It's being in a position to see that it could BE different and then putting it into a framework that brings others to embrace the change.