One of my heroes in the pantheon of people who have big ideas is ad legend George Lois. Some years ago I flew to New York just to do an interview with him. To the left you see one of his (in)famous covers for Esquire magazine (in case it's too small for you to make it out, it shows Andy Warhol drowning in a can of Campbell's tomato soup).
I've just discovered a site that has videos of a long lecture he gave at The School of Visual Arts. He's well into his 70's now (although if you look at his own site, www.georgelois.com you'll see that he prefers to feature pictures of himself as a younger man...), and he rambles a bit, but it's great to see and hear his passion and his devotion to Big Ideas. The site with the videos of his talk is here. (If you're a fan of graphic design, you'll also be interested in the talk by Milton Glaser you'll find there.)
ps: if you've been trying to access my www.yourwritingcoach.com site and not been able to do it, we've had massive problems with the server. We are in the process of moving it to a different server so the problem should be solved very soon.