Since the dawn of time, humans must've known that they were special creatures. Just by pure comparison with the surrounding animal reign and regardless of its sometimes overwhelming physical power, the humans must have known that they were superior. The elevated human intelligence out -shadows any other living creature on this planet, but this extraordinary feature doesn't come without its specific problems.
All of us have been angry or upset at someone else at least a few times in our lives. No matter how accepting, reconciling and peaceful you are, you are bound to get into a situation where you get angry with a friend, co-worker or a member of your family. It seems as if the anger in our lives is growing in the last few decades, but I am not sure that this is an actual true statistic. I think that nowadays we have a lot more tools to express our anger in a public manner that it has become much more obvious and in our face.