The "Articles of Confederation" and "Perpetual Union" are two of the first American Constitutions wrote.
Answer:
Manifest Destiny
Explanation:
Assuming you're referring to the 1872 painting 'American Progress', where a woman in white is crossing the plains alongside pioneers and Natives, the woman represents Manifest Destiny.
This is the idea that God deemed the American nation to be worthy of conquering the continent and spreading their civilized, superior culture, ideals, government, and society from the Atlantic to the Pacific.
It explains why the framers of the constitution made the government republic.
The Etruscan civilization is considered to be the forerunner of "Rome" and Roman civilizations, since in fact the Etruscans were the original inhabitants of the territory in present-day Italy that became Rome.