http://www.nbcnews.com/science/environment/social-networking-technology-unlocks-mystery-chimp-civil-war-n103206 Notes of the Chimpanzees were taken over a four year period. The alpha male had died and some of the chimps followed a male named Humphrey, in the North. Others followed two brothers, Hugh and Charlie, in the South. One of the software pieces that helped figure out the social ties between chimps was UCINET. It showed that the chips decided who to stay with based upon the amount of time they had spent together before the alpha male, Leakey, passed away.
Advancing The Science of Networks in Communities