No offense TM but could you broad brush a little more....?
I love history, I almost majored in it, until I couldn't figure out what to do for a living with it except teach (looking back, not a bad idea). There have been tribes of people moving around this earth taking from weaker people for centuries, exploiting the riches/spoils of the land, whatever they may have seen to be at the time, before there were nations. We are still discovering are past, but we know enough to know that no people are innocent when given the upper hand over another.