What factors allowed Baghdad to prosper as the new center of the Islamic world?

4 copper and gold, the california gold rush is why im pretty sure.

need more info

explanation:

during the 1920s the goal of the united states was not letting business collide or go down or even compete this was due to wwl

because the earth is a round globe. but that is just what they tell us it is flat and those dudes actually where lying they sailed east.