Why 'Declaration of Rights of Man and Citizen' is considered as a revolutionary document in french revolution

What is the importance of the document

'Declaration of Rights of Man and Citizen'?

Why 'Declaration of Rights of Man and Citizen' is considered as a revolutionary document in french revolution? 

Answer: Declaration of the Rights of Man and Citizen is regarded as  a revolutionary document because: 

1. It abolished the privileges and power given to the French feudal classes i.e. First Estate and Second Estate. 

2. It provided equal distribution of the burdens of taxation and rights to public property among all citizens. 

3. The Declaration emphasized equality before law and freedom of speech and press.Every citizen has right to speak, print and express.