After a long period of stability in the 1990s with TedBell as creative director, the last decade saw a succession of creative directors: Jim Ferguson was creative director until 2003, before relinquishing the title to Michael Patti.
He ended with a challenge to the TED audience of technologists and high net-worth world beaters, can you match what Thomas Edison, Alexander Graham Bell and others achieved in the 19th and 20th century.