Reading Suggestion from Lee Carlon: "The Social Animal" by David Brooks.
Also a gorgeous illustration of seemingly smart behaviour from the simplest of rules: Braitenburg vehicles. (The Brooks reference reminded me - a lot of my thoughts on this stuff stems from my days studying cognitive science at uni, and Braitenburg vehicles are very neat)
The core concept here is the idea of intelligence and free will as an emergent property of interactions between millions and trillions of individually dumb components.
Another work from Dennett on this front is "Freedom Evolves". Very meta (albeit not as meta as anything by Douglas Hofstadter)