Features conversations with people who offer pieces of the puzzle of “a world that just might work” -- provocative approaches to business, environment, health, science, politics, media and culture. Guests have included Ken Burns, Deborah Tannen, Andrew Weil, Jeremy Rifkin, Arianna Huffington, Roger Ebert, Bill Joy, Alvin Toffler, Paul Krugman, Bill Maher, and Norman Lear.