Humans are social animals. We've spent a long time having someone watch our backs; those who didn't were either eaten or mugged. Those "genetic memories", for lack of a better term, are the ones that got be passed on.

Me, I hate crowds. I get this feeling if there are ten people in a conference room, and commercial aviation is a night mare. But even I need to interact with people. If you don't have people around, you make one, ie "Wilson".