History sells because people like reading about other people's mistakes. History is meant to be something we study so we don't make the same mistakes.

I think history has already proven that everything is connected. I also think that sometimes we misinterpret the connection of everything. It's similar to the butterfly affect in science. If someone were to go back in time and change just one small event, it would have a lasting impact on history and the future. It's a chain reaction.