This is something all Americans need to pay a lot more attention to. What was this country founded upon?
Jefferson borrowed the expression from an Italian friend and neighbor, Philip Mazzei, as noted by Joint Resolution 175 of the 103rd Congress as well as John F. Kennedy in "A Nation Of Immigrants."
The opening of the United States Declaration of Independence written by Thomas Jefferson in 1776, states as follows:
"We hold these truths to be self-evident, that all men are created equal, that they are endowed by their Creator with certain unalienable Rights, that among these are Life, Liberty, and the Pursuit of Happiness. That to secure these rights, Governments are instituted among Men, deriving their just powers from the consent of the governed...." From Wikipedia