It is my belief that very key statements were put into the Declaration of Independence and not the Constitution because the F.F. knew the Declaration would not be subject to any form of modifications.
so...
" That to secure these rights, governments are instituted among men, deriving their just powers from the consent of the governed. "
" it is the right of the people to alter or to abolish it, and to institute new government "
" But when a long train of abuses and usurpations, pursuing invariably the same object evinces a design to reduce them under absolute despotism, it is their right, it is their duty, to throw off such government, and to provide new guards for their future security. "
Given our current circumstance, the F.F. knew exactly what we would eventually face.
We are "there."
.
BINGO!!!
They knew.. and they knew WELL.