Why was the concept of one world or the unification of all people important to persia

They had no tolerance for other cultures, so they made their conquered peoples to adopt the Persian culture.  

Explanation:

The Persian civilization was one of the most significant civilizations of antiquity. Persia was located east of Mesopotamia, on a large plateau where it now corresponds to Iran, located between the Persian Gulf and the Caspian Sea.  

The Persians conquered many peoples who lived near the highlands of Iran, imposing the same administration and customs on all, creating the concept of "one world". They eventually built a vast empire. Its territory comprised Asia Minor, Mesopotamia, and a part of Central Asia.

zoom in on the bill of rights. the other side was just as divided: some antifederalists opposed the constitution only because it lacked a bill of rights, and others opposed it on other grounds and merely used the bill of rights as an excuse to campaign against it.