Our ability to think is one of our most puzzling characteristics. What it would be like to be unable to think? What would it be like to lack self-awareness? The... » 

Our ability to think is one of our most puzzling characteristics. What it would be like to be unable to think? What would it be like to lack self-awareness? The complexity of this activity is striking. Thinking involves the interaction of a range of mental processes - attention, emotion, memory, planning, self-consciousness, free will, and language. So where did these processes arise? What evolutionary advantages were bestowed upon those with an ability to deceive, to plan, to empathize, or to understand the intentions of others? «