When Darius was the leader the Persian empire was at its height, since he was tolerant of other cultures as long as they payed taxes the economy was pretty good, during this time he also expanded the Persian road system that included a mail system Under Xerxes the empire fell into decline the Persian wars devastated his economy and his intolerance of other cultures led to costly revolts and the demise of the Persian empire more.
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.