So I'd like to leave you with these thoughts. First of all: we all form tribes, all of us. You're in tribes here. Hopefully you're extending the reach of the tribes that you have. But the question on the table is this: What kind of an impact are the tribes that you are in making? You're hearing one presentation after another, often representing a group of people, a tribe, about how they have changed the world. If you do what we've talked about, you listen for how people actually communicate in the tribes that you're in. And you don't leave them where they are. You nudge them forward. You remember to talk all five culture stages. Because we've got people in all five, around us. And the question that I'd like to leave you with is this: Will your tribes change the world? Thank you very much. (Applause)