Explain Regional Integration

Explanation:

The process by which two or more nation-states agree to co-operate and work closely together to achieve peace, stability and wealth. ... This means that the integrating states would actually become a new country

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.