International trade is better for all countries because it creates a global market in which all countries can trade based on their individual abilities.
No country is able nor it has the resources necessary to produce all the needed goods on its own. In order to do so, natural resources, labor market and manufactures would have to be working perfectly all the time.
Most countries share their trading business with others, exchanging material, labor force or the already produced goods. This way, each country does what it knows it does best and the poorer, not so developed nations are taken into consideration as well. This creates an international cooperation of nations that support each other in difficult times and provides for stability in the world's economy, enhancing fair competition, free labor movement and fair prices.
Ersian Empire satraps were appointed to govern the provinces. It was first established in 550 B. C. by Cyrus the Great with the invasion of Media, Lydia and the Bablylonia. The major religion of Persian Empire was Zoroastrianism but then later change to Islam after 7th century.
Presidential; two groups (executive & legislative) that check and balances each other because the legislature elects the executive in a parliamentary government. The executive is a branch of government that has a responsibility for the daily administration of the state of bureaucracy. The legislative is the one has the power to create law.
Not wanting to give just one state the whole power