Former NBA Commissioner David Stern discusses how diversity forms the foundation of the league's recent growth and success. At one point, Stern was told the NBA was "too black to thrive." Now, it's as popular as ever.

Journalist Eric Schlosser, an executive producer on the film Food Chains, discusses the exploitation of poor workers in the American food system.

"Every system that we build will surprise us with new kinds of flaws until those machines become clever enough to conceal their faults from us." -Cognitive scientist Marvin Minsky  

Biographer Walter Isaacson discusses the contributions of both Alan Turing and Ada Lovelace to modern computer philosophy.

"I am grateful for what I am and have. My thanksgiving is perpetual. It is surprising how contented one can be with nothing definite - only a sense of existence."

Food writer Michael Pollan explains how the history of barbecue in America is one that includes all kinds of people working together in an integrated effort to produce the best possible meal.

"I believe in democracy, but in real democracy, not a phony democracy in which just powerful people can speak. For me, in a democracy everyone speaks."