Hinduism turned the polytheistic views of the Aryans into one supreme god with multiple forms.
Cyrus the Great
-defeated the Medes and became the first leader of the Persian Empire
-created the Immortals, a force of 10,000 highly skilled warriors to serve him
-expanded the Persian Empire by conquering surrounding lands
Darius 1
-divided the Persian Empire into 20 provinces (these were called satraps)
-tolerated religions and customs of conquered peoples
-established the capital called Persepolis
International trade enables specialization, which brings increased efficiency and greater competition to spur the market.
This happens because Specialization would make each nation to focus on producing certain type of products in which they would gain a competitive advantage towards other (either because they had the necessary materials sources or labor qualities) and would create better and cheaper product in the market.