I think there is no way that Christianity could have not played a large roll in the formation of this country. Just because the enlightenment was an by-product of Christianity. It was and is part of the evolution of thought in the western world. It also needs to be recognized that todays Christian fundamentalist would completely reject the brand of religion of many of our founding fathers (Except for Washington because he was silent). They would not call them Christian. They rejected of the divinity of Christ, and the inerrancy of the Bible. So lots of the folks who are yelling loudest that this is a Christian country would completely reject the faith of our first few presidents. I do not believe that Jefferson or Adams could be elected today because of the things they have put in writing.
The thread title:"Is The U.S. Founded On "Christian Principles"" reminded me of this post I read yesterday by David Sirota for Alternet:
The Wild Hypocrisy of America's Conservative Christians
In Britain, the devout tend to be economic progressives. Why have American Christians embraced social Darwinism?
Here's a newspaper headline that might induce a disbelieving double take: "Christians 'More Likely to Be Leftwing' And Have Liberal Views on Immigration and Equality." Sounds too hard to believe, right? Well, it's true -- only not here in America, but in the United Kingdom.
That first paragraph reminded me of how insular American conservative Christians are in their thinking about what is and what is not "Christian." As the rest of Sirota's article notes, American fundamentalists are poles apart from fundamentalist Christians in other parts of the world on many economic and social issues.
In a nutshell, it seems to me that the drift started way back before the founding of the Nation, when the Puritans arrived and started setting up colonies. They began with a sense of "Manifest Destiny" -- that the new land was a Promised Land, given to them by God, and that doctrine was used to justify the ethnic cleansing of natives afterwards, and even the taking of lesser peoples in slavery. The same kind of thinking is found in Mormonism, Zionism (whether Jewish or Christian), and the Dutch Reformed Church in South Africa of the Dutch Afrikaanders.
In more recent times, Sirota notes that fiscal conservative thinking did an about-face sometime after the era of William Jennings Bryant -- when being Christian conservative meant disparaging the wealthy and the materialistic as godlessness to the full-blown acceptance of Ayn Rand social darwinism. Interesting to note that the so called "brain" of the Republican Party in Congress - Paul Ryan, is reported to demand that potential staffers have to read Rand's "Atlas Shrugged." He doesn't ask them to read the Bible....no he wants them to read the objectivists and libertarians bible to get the proper philosophical grounding on economic and fiscal issues. So, can we say now that for the most part, American conservatives have created their own religion? Or their own version of Christianity? That's the way it would appear if we compare what they believe about money and economics with what it says in their Bible on these matters.
Also as big of influence of thought on the start of our government is the Constitution of the Iroquois Confederacy. This Confederacy was set up by a native Holy man named Dekanawida a few 100 years before the founding of our country. I would say that he had as big of influence on our form of government as Christianity. He just dosnt get any credit.
Even though I have Mohawk blood in my lineage from my father's family, I am a little dubious of taking this claim that the the U.S. federation is based on the Haudenosaunee (Iroquois) Confederacy. No doubt, the Colonials were well aware of Confederacy and some leaders took the time to learn about the Iroquois, since there survival in Up State New York depended on having good relations with them. But, as far as I am aware, there is no direct connection between Jefferson and other F.F.'s, and the Confederacy framework, although there are a number of historians who argue that the similar elements indicate this influence, even if it was not attributed to the Iroquois.