Rising inequality and growing political instability are the direct result of decades of bad economic theory, says entrepreneur Nick Hanauer. In a visionary talk, he dismantles the mantra that "greed is good"—an idea he describes as not only morally corrosive, but also scientifically wrong—and lays out a new theory of economics powered by reciprocity and cooperation.

No lesson this week as we prepare for the new season, but we'll be back again soon.