For me, The Origin of Consciousness by Julian Jaynes. It has really caused me to look at the world through a new lens. While the book is Jaynes' idea, the evid

For me, The Origin of Consciousness by Julian Jaynes. It has really caused me to look at the world through a new lens. While the book is Jaynes' idea, the evidence he provides is fascinating as are some of the competing views that have originated from this book.