After muhammad's death his followers chose a leader for the muslim empire called

Which was the cause of the rise of the persian empire?

In italy, the distance between milan in the north and palermo,sicily, in the south is about 550 miles. in the united states, the distance betweenboston, massachusetts, and savannah, georgia, is about 900 miles. do you think the american revolutionaries of 1776 in the 13 colonies faced some of the same challenges as the patriots who struggled for italian unity in the 1860s?  

How did thomas hobbes’s interpretation of the social contract differ from john locke’s?