It expresses that the people are working together to make a more perfect union and make the United States of America a legitimate country with a constitution. The people in power are chosen by the general population, so it's a form of representative democracy.
No matter how wealthy they may be it doesn't give them happiness.
Thomas Jefferson's Declaration of Independence was published in year of 1776 is said to be a form of text that uses "pathos" as it appeals to emotions when it calls for a sense of empathy from the crown by making a list of percieved acts of tyranny from the king George III.
Specifically in the last 5 abuses, from 23 to 27 it makes a reference to the acts of the King: To suppress the colonial rebellion through violence and military means to attack the colonists. They burned towns and attacked ships.
By this writting is is evident that the author was trying to persuade and gain the audience, emotionally speaking.