Ageographically expressive political system that acknowledges the existence of regional cultural differences and provides the mechanisms by which various regions can maintain individual characters is described as

the factors that the economies of the muslim empires prosper were:

1- land trade routes-located between three continents  

2- sea trade routes

trade contributed to the spread of muslim empires, and with that islamic culture led to a growing feeling of internationalism resulted in the transfer of technology, science, and other cultural forms.