Yesterday my friend Akaba gave a talk about her work with various rodents on the neural basis of sociality (and variation therein.) One of the interesting points that came out in the conversation that followed it that many of the researchers there had the impression that in the groups we study, the more social species are more docile when handled. I think this is cool, and makes a lot of sense. A big part of being social is just not getting pissed off too easily, or at least not responding disproportionately when you do get pissed off.
I hope she follows up on this.