we the people of the united states, in order to form a more perfect union, establish justice, assure domestic tranquility, provide for the common defense, promote the general welfare, and secure the blessings of liberty to ourselves and our prosperity, do ordain and establish the constitution for the united states of America.

(CAN ANSWER SOME IF NEEDED)

what are the nouns?
why does the author list these nouns?
what do these nouns establish as the purpose of the document?