Look at America. Our philosophers were Locke, Hobbes, the rest of the Enlightenment philosophes. Just like "Old Europe." "This tendency gave us just in the last 100 years fascism, Marxism/communism and most lately postmodernism which — along with its handmaiden, multiculturalism — insists there is no such thing as objective truth."
The "tendency" of societies to base themselves on Western philosophy is the rule, not the exception. As a matter of fact, the only countries currently free of Western philosophy are theocratic dictatorships in the Middle East.
The Founding Fathers established the U.S. upon a set of principles from a number of sources, not upon the work of one particular person.
They borrowed freely from the enlightment but were not slaves to it.
They were practical men who started with one simple precept, that all men are created equal, and built uopn it.