Our ultimate goal is to use the empirical knowledge about non-human primates to inform our understanding of how the human mind has evolved. Even if the human mind is unique, it is nevertheless possible to trace the evolutionary origins of (some of) its elements and precursors. Some of these are the result of shared ancestry, such as our big and powerful brains, whereas others, such as our cooperativeness, are more likely the result of convergent evolution in the context of cooperative breeding.
According to this working model, at least part of the answer of what made the human mind special is that early in human evolution, a chimpanzee-like intelligence was combined with the prosocial attitudes inherent to shared infant care. This combination is unique in the animal kingdom, and unleashed cascading processes with far-reaching consequences for cooperation, communication, cognition and culture.