First Of All This Whole Forum should be Labeled " God & Philosophy "...
Every one Here Uses ( Ten Units of "Philosophy" to one of science )
I Agree with "Mark's" Equation, Every Action Lead to a Re-action which also leads to another action & definitely God is The Main Concept, The Main principle, The reason why all of this World exists....
And Yeah, One day every thing will cease to exist, because this is How it goes, every thing in the Universe is Born, Grows & Dies at the End; Man, Plant, Animal & Even Stars & Planets...
But the presence of The Universe isn't without Point. The Point of all of this is to Lead us to Follow The Line, Find The Equation & Find God.
The Human beinings are very argumentative, They Don't Want The Truth just hanging there, They Want to Work hard to get it & then argue whether it is really the truth or Not & this is what god gave them.
God sent Prophets, so that people know he is there, & That he is The Creator of every thing & That he is the one to be worshiped, Not The Moon , Not The Sun & Not even life...
Because life it's self is a God's Creation. But what if you don't believe the Prophets ??? Well there is another way to you to reach God on your own.
Just look around yourself & You'll get The principle, you'll find God The Hard Way. But again will come someone that says No that thing happened for this Rule or That, There is No God.
And Here comes the reason for the Puzzles, the chain of " Laws that follows as a natural succession of yet more fundamental, deeper principles. " as "Mark" said, if you even can convince someone that
God Doesn't exist because " Fact X " can be done by this & that, So what about " Fact y " & "Fact z ",... etc
So, further analysis to the supposed reasons for the "Facts" reasons will Finally Lead Back to God .
I Believe That the aim of the whole Universe is to believe that God is There & worship him the way he Wants because he is the Creator of you the earth & the whole Universe.
Sorry for the "philosophy" But you started it out... ;-)
Ps Mark : I Really appreciate your View of The American Policy....
specially If you are American in the First Place