What can the study of world history teach about what humans are and how they think and interact?

World History teaches the origins of mankind, our evolution and much much more. It can teach us how we became what we are, why we function the way we do, find how long we have been on the earth. It can tell us we probably evolved from primates. It can tell us that we were smarter than the Neanderthals. It holds the secret to the history of mankind. (Not to sound like Morgan Freeman or anything)

History often repeats itself, so by looking at the patterns of mankind throughout history (finding a scapegoat for problems, exiling those that are different) we can see that humans have a selfish nature that sorts people into categories based on who they are. There is also a superiority complex (pecking order) that comes at play