Purpose of Government

   The signers of the Declaration of Independence are not the same as the members of the Constitutional Convention  
Government proposed in Declaration of Independence, 1776 established by Constitution, 1787
republic = no vested offices, sovereign power is limited

"of the people"

"We the representatives...in the name and by the authority of the good people of these colonies..." "We the people...."
democracy = participation by people in their own governance; access to government

"by the people"

"alter or abolish..." only the House is elected by the people. No language about access.
purpose of government = to protect inalienable rights

"for the people"

"To secure these rights governments are instituted among men..." "...in order to form a more perfect union, establish justice, insure domestic tranquility,  provide for the common defense, promote the general welfare, and secure the blessings of liberty..."
confederation of independent states "...these united colonies are...free and independent states..." "No State shall enter into any treaty, alliance, or confederation...."