Watch Happy Maps, a TedTalk by Dan Quercia. This video presents some ideas on thinking differently about the ways we move around places in our lives. How does the path you choose affect your view of the world around you?

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.