Sam Harris speaks with Robert Sapolsky about his work with baboons, the opposition between reason and emotion, doubt, the evolution of the brain, the civilizing role of the frontal cortex, the illusion of free will, justice and vengeance, brain-machine interface, religion, drugs, and other topics.

If the Making Sense podcast logo in your player is BLACK, you can SUBSCRIBE to gain access to all full-length episodes at samharris.org/subscribe.