There is something ironic in the fact that the dominant intellectual force behind thinking about innovation in recent years has been a quietly spoken professor in a neat suit based at Harvard Business School.  Even more ironically, his big idea is concerned with disruption.

When you meet Clay Christensen smart ass thoughts about irony quickly disappear. Christensen, an imposingly tall man, also possesses an imposing intellect and look-you-in-the-eye charisma.  He is a man who patently cares about making the world a better place. “If all I leave the world is a bunch of books . . .