What is the significance of the French Declaration of the Rights of Men and Citizen?

The Declaration of the Rights of Man and of the Citizen, passed by France's National Constituent Assembly in August 1789, is a fundamental document of the French Revolution that granted civil rights to some commoners, although it excluded a significant segment of the French population.

Explanation:

the conditions that made the byzantine empire vulnerable to attacks by the muslin turks were the sack of constantinople by western crusaders, the conquests of the sultanate of rum, presence of rival kingdoms and finally the set up of fiefdoms at the empire which were owned by the ghazis (turkish warriors).