Nautilus has a fascinating article about the psychologist Julian Jaynes, author of the influential cult classic The Origin of Consciousness in the Breakdown of the Bicameral Mind. In it, he argues that ancient peoples were not conscious; one half of their mind spoke to the other with ugidance in the voice of the gods until about 3000 years ago, when self-awareness emerged. Jaynes conducted animal behavior research as a graduate student at Yale before moving to England to become a playwright and actor. “O, what a world of unseen visions and heard silences,” his only book begins, “this insubstantial country of the mind!” Jaynes’ theory treats consciousness as a cultural rather than biological phenomenon, which is not a popular view these days. However, more than one neuroscientist that I know has cited Julian Jaynes and his The Origin of Consciousness as an inspiration for entering the field.