No the country was and is great because the founders understood that power corrupts and crafted a government on the concept of checks and balances and limited power. You give a judeo Christan leader absolute power and that person will turn into a dictator just like every other human on this earth. Period. That is why these Christian men gave us freedom of religion and freedom of speech and 3 branches of government and it is also why they understood those rights came form God not corrupt man.
The roman empire collapsed because they switched from a republic to a dictatorship and citizenship become worthless. You do understand the greatest period of Rome expansion and growth was before Christ was even born right at a time that they worshiped many gods like Mars and Venus? In fact Rome was founded 750 years before Christ.
Because they understand RIGHTS ARE ENDOWED THE CREATOR -- the God of the Bible. And, because they openly based criminal law on the Bible:
"Christianity is part of the common law"
[Sources: James Wilson, Course of Lectures [vol 3, p.122]; and quoted in Updegraph v. The Commonwealth, 11 Serg, & R. 393, 403 (1824).
"The Bible was America's basic textbook in all fields."
[Noah Webster. Our Christian Heritage p.5]
You're, apparently, trying to rewrite history just as liberals are attempting to do.