Last Ape Standing: The Seven-Million-Year Story of How and Why We Survived

Last Ape Standing: The Seven-Million-Year Story of How and Why We Survived - Chip Walter The author does a very good job at explaining why us humans are so special. He looks at our journey from the ape to humans and focuses in on the development of our brain and how our long childhood past birth helps explain how we became human. Our ability to symbolically represent abstract objects in a recursive fashion makes us different from any other known object in the universe and the author shows the how, the why and the what that led to that ability.

It's very hard to find good books on this topic and this is one of the better ones.