a friend of mine commented me to stop saying that morality comes from the bible. I actually said that our standards of morality in America (a vague idea- i meant legally and generally held beliefs, the most universal belief systems we have) have come from the Bible. How could they not have? How many signers of the declaration of independence were christian? "Of the 56 men who signed the Declaration of Independence, nearly half (24) held seminary or Bible school degrees" These were not people who had a fleeting knowledge of Christianity, but an in depth study.
"God who gave us life gave us liberty. And can the liberties of a nation be thought secure when we have removed their only firm basis, a conviction in the minds of the people that these liberties are of the Gift of God? That they are not to be violated but with His wrath? Indeed, I tremble for my country when I reflect that God is just; that His justice cannot sleep forever; That a revolution of the wheel of fortune, a change of situation, is among possible events; that it may become probable by Supernatural influence! The Almighty has no attribute which can take side with us in that event."
-Thomas Jefferson
What Thomas Jefferson, arguably the most godless of the founding fathers, realized was that if there were a god who was evil, or no God at all, then personal liberties are meaningless. He did not believe in the God of the old testament, or that Jesus was born of a virgin. But he did believe that God was good and just, and that life was a gift from. Sound familiar to any religions you know of? He obviously could not get the idea from atheism, or Buddhism, but the culture that he was raised in. it would be impossible to know if Jefferson would have gotten his ideas of a perfect God from Islam or Judaism, but it is implausible that he reached his conclusion through nothing apart from his own logic. He saw Christianity, then picked out and chose what he liked. although this does not prove anything true about Christianity, it does show his view of everything was vastly guided by what he saw in everyday life, and most of that was christian.
Think of how open minded the founding fathers must have been to allow a person who did not agree with the majority on matters of the Bible and Christianity. Are there any Islamic governments that would let a man who is not a Muslim create their basic foundation? I honestly do not know, but have never heard of one, and the strict laws, based immediately on the Koran, are evidence that not many of their countries have been founded largely by an agnostic.