Matt Ridley's presentation at the recent TEDGlobal 2010 conference, in which he demonstrates how, throughout history, the engine of human progress has been the meeting and mating of ideas to make new ideas. He uses some unique examples to make his overall point: that the EXCHANGE of ideas is what moves innovation and progress forward. We like that.
www.ted.com/talks/matt_ridley_when_ideas_have_sex.html