Funny, I knew about the chimp wars but totally forgot until you mentioned it. Seems like I was biased in favour of all animals, lol.

I'll search for Goodall's literature to know more. It does sound to me that cognition and self awareness is a continuous function in the sense that there is no discrete threshold in which morals emerge.

Wolves are a very interesting example too, but I also remember something about the concept of "alpha" being discovered only in captivity wolf packs. Also need more reading.

Thanks for the links!

Considering chimps and humans share - depending on source, 95-99% of DNA, I'd be much more willing to consider them closer to humans than animals. In fact, there are - biologist - voices who argue that they should be moved to the homo genus.