Sure, they are some people who are okay with being alone and would be okay with living on a desert island without other people around, but I think these are muc

Sure, they are some people who are okay with being alone and would be okay with living on a desert island without other people around, but I think these are much fewer people than most people think. Even people who claim to hate other people find it very difficult to work in environments where their work is unappreciated or useless. Almost no one in the world would be happy digging a ditch and refilling it the next day and repeating it even if they were paid $1000 a day to do it. Why is that? Why would a programmer who isn't very social want only work on stuff that is useful to other people? It's because the vast majority of us are hard wired to be useful to society and other people. We desperately need to feel some connection to others. The only way digging a ditch and filling it in would be satisfying is if you knew you were taking care of your family by doing it. >Cohesion in large groups are aided by strong personalities that create and sustain larger groups(hierarchies) and than in turn enables larger groups. I completely disagree. Cohesion is stronger in small, less hierarchal groups. The key is grouping groups together. Why did the American states unite and form the USA and the Greek city states before the rise of Macedonia not? It's not an easy question to answer, but strong man personalities doesn't seem like it's an answer.