Moral Tribes; Ann Patchett on Her Memoir; Mao Changed China; Ben Franklin's Sister

Neuroscientist Joshua Green explains how human brains have evolved to deal with the conditions of our modern societies. Ann Patchett discusses writing and relationships in her new memoir, This is the Story of a Happy Marriage. We’ll look at the rise of Mao Zedong and his attempts to transform the Chinese into “The New People” at whatever cost. Historian Jill Lepore introduces us to Benjamin Franklin’s sister Jane, who was a gifted writer and a shrewd political commentator.