Who writes this stuff?
If you win then you get to write history. If you win you get to say what is right and what is wrong. You get to have your views in the papers and now days TV and that's the way it has been for as long as... forever. We are taught what the winners want taught.
The history of man has been edited: all of it. A vast majority was simply destroyed by conquering armies. The tactic here is, take away the peoples culture, get rid of any written text, destroying their history, their beliefs and traditions. This accomplished, there is nothing left of what held them together. By erasing their history, and those in charge of keeping it alive, you can just absorb them. The next generation, or so, won't remember.
This is a really good time to be on earth as far as history goes. Either a new system will be put in place that provides a livable environment for all life forms: or we will all die. What could be better than that? We're right on the front lines of the battle between power and ethics that could end in our own extinction. I like to think it won't end with our disappearance. Life is hard for the the destructive ones. They are sorely outnumbered so they have to fight like devils. One thing to always keep in mind if you're planning on "selling a lie" is that you have to remember, defend, and hide that lie forever, or be found out. This unveiling is taking place on a massive scale right now.
If we can get to a point, as a society, where we at last have the facts about the history of the world in which we live, then societies might finally begin to do better things.
One thing we can all agree on is that history repeats itself. On the personal level we see this potential in our own repeating patterns. If we don't learn from our mistakes and make adjustments we will repeat them. Some never learn.