Final answer:
Benjamin Franklin warned US citizens about the importance of political union, inspired by the Iroquois Nation. George Washington also warned against the negative impact of political parties.
Step-by-step explanation:
Benjamin Franklin warned US citizens about the importance of political union. In his famous statement 'Join or Die,' inspired by the six tribes of the Iroquois Nation, Franklin emphasized the advantages of unity in the face of opposition, such as the British during the fight for independence. Additionally, George Washington warned against the negative impact of political parties, advising caution in their influence. Franklin and Washington both stressed the need for unity and caution in order to protect and strengthen the young nation.