I wish there was more literature about this, both academic and fictional. I've always found it amusing how far people go to believe that we're detached from the wild animal in us. From conception to some young age I'd say we barely differ from animals (hence why some animals are compared to humans at various, usually single-digit, ages). Then even once we're grown, there are many situations where I think, surely this is what a regular animal experiences too: looking for something and absentmindedly searching, having fun running around with friends, identifying a dangerous situation and either taking action to defend loved ones or flee, etc.
I recommend Jane Goodall's memoirs (In the Shadow of Man, The Chimpanzees of Gombe, and more), I think they provide a fairly balanced view on our relationship with our near ancestors (what Chimpanzees can and cannot do).
