Because I've never seen an ideal pick up a hammer and nails and start building a city. I've never seen an ideal write a book of philosphy or create a masterpiece of art.
The West is the dominant civilization in the world. There are ONLY two possible explanations:
1) We have adopted better ideas than everyone else. 2) We are born better than everyone else.
I know which one you believe.
What makes you so sure these are the only two possibilities, my presumptious friend? It seems as if you need to give this topic a wee bit more thought.
Just out of curiousity, why did we adopt better ideas than everyone else? Where exactly did these "better ideas" come from?
If the founders did not believe in anything there would not be an America because there would be nothing to fight for.