Thomas Jefferson was the third President of the United States (1801-1809), the principal author of the Declaration of Independence (1776), and one of the most influential Founding Fathers for his promotion of the ideals of republicanism in the United States. He envisioned America as the force behind a great Empire of Liberty that would promote republicanism and counter the imperialism of the British Empire.
The tree of liberty must be refreshed from time to time with the blood of patriots & tyrants. It is its natural manure. --Thomas Jefferson