Innovation may turn out to be radical, but it’s built on solid foundations of what is already working. Steven Johnson is an expert in where good ideas come from, and he picks the prime example of the World Wide Web, created by Tim Berners-Lee.  It’s a great story of making use of something that was already there, then adding to it – which is a definition of improvisation and a clear case of ‘yes-anding’.  And that’s in contrast to the equally visionary notions of Ted Nelson, who didn’t create the WWW.  In this sense, we see how improvisation is key to innovation.