How do political systems rise, develop and decline ?

I'll answer this as best as I could. I really hope this helps.

Explanation:

Political systems are formed when a group of people in a civilization begins to form social classes, with the elite at the top and making decisions and laws. They continue to rise when the political system of one civilization begins to branch out to other civilizations, but they also decline when that political system is overthrown by another, or if they experience a mass decline in public opinion.

answer; i believe that they became wealthy from gold and salt in their area, and became powerful by controlling trade in west

the secretary of state, appointed by the president with the advice and consent of the senate, is the president's chief foreign affairs adviser. the secretary carries out the president's foreign policies through the state department and the foreign service of the united states.