Bill Gates. TED2011
He was guest curator of excellent Session 6: Knowledge Revolution. He also gave a talk at the TED University Session 3, on State Budgets and delivered to all a book called: Educational Economics.
For me, one of the highlights of TED, in both cases.
Full TED2011 album www.facebook.com/media/set/?set=a.10150599859310542.67360...