Why is the declaration of independence called the cornerstone of democracy for everyone in the world?

There are several reasons why the Declaration of Independence is referred to as the "cornerstone of democracy" by one of the major reasons is that it was the first of its kind. 

The  ancient egyptians  who  built the pyramids  may have been  able  to move massive stone blocks across the desert by wetting the sand in front of a contraption  built  to pull the heavy objects

C. equitable; undue influence