Who was the greatest persian king?xerxes,cyrus or darius?

Cyrus (also known as Cyrus the Great). "Cyrus was distinguished equally as a statesman and as a soldier. By pursuing a policy of generosity instead of repression, and by favoring local religions, he was able to make his newly conquered subjects into enthusiastic supporters.32 Due in part to the political infrastructure he created, the Achaemenid empire endured long after his demise.

The rise of Persia under Cyrus's rule had a profound impact on the course of world history. Persian philosophy, literature and religion all played dominant roles in world events for the next millennia. Despite the Islamic conquest of Persia in the 7th century CE by the Islamic Caliphate (Arab Empire), Persia continued to exercise enormous influence in the Middle East during the Islamic Golden Age, and was particularly instrumental in the growth and expansion of Islam.

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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.