E. O. Wilson; Eric Kandel; Steven Pinker

Sociobiologist and Pulitzer Prize-winning author E. O Wilson introduces his book, "The Social Conquest of Earth," in which he considers the fundamental questions: Where did we come from? What are we? Where are we going? Eric Kandel, author of "The Age of Insight," describes the importance of our unconscious processes, the science of creating and perceiving art, and explains how the Viennese intelligentsia of 1900 were able to bridge art and science. Author Steven Pinker shares his book, "The Better Angels of Our Nature," an examination of the reasons why violence has declined around the world.