We the people of the united states, in order to form a more perfect union, establish justice, insure domestic tranquility, provide for the common defence, promote the general welfare, and secure the blessings of liberty to ourselves and our posterity, do ordain and establish this constitution for the united states of america.1 which idea is expressed in this excerpt from the constitution? a. average citizens cannot be trusted with political power. b. states are as responsible for the defense of the nation as the military is. c. it is important to amend the constitution to keep it relevant. d. the constitution is a guiding document that will improve the country.