To try and state the origin of everything in evolution, or in a god or in goldilocks, or gandalf or whatever tickles your pickle really doesn't matter and in the end comes down to a degree of faith. From an evolutionist perspective you're still left with the idea of why. Why would the big bang occur? Because there was a bunch of matter/energy under compression. Why was that there? Why does anything exist in the first place? Thats where a degree of faith comes in. You can believe a god created everything, or a god created a bunch of compressed matter or energy, or that gandalf the grey waved his staff and fought a balrog and the universe was created out of balrog remains (why was the balrog there in the first place?). In the end everything you try and justify through religion or science or whatever the fuck you wanna classify something as will come down to a degree of uncertainty.
Im personaly in favour of religous belief. In a quantitative fashion its not a be all and end all of thought. But if thought through logically, and taking everythign with a grain of salt, i think it can help to provide a great deal of order, morality, purpose, etc. in someones life.
To validate whether there's a god or not has little impact on some of the positive aspects of religious belief. Aside from the psychotics that bomb abortion clinics, or austricize(sp?) homosexuals or genocide etc. that occurs in the name of religious belief, i think there's alot of positive aspects of a faith base. Many people have reason to no longer abuse drugs, hurt others, they have a reason to wake up every morning. A faith base can help positively impact a person's life in alot of ways. It helps give people an absolute in a completely relative world. It gives people purpose and drive, and can oftentimes help bring people together to make this world a better place.
Overall there's no quantitative way to prove of a gods existence, or of an evolved world of sheer matter, or whatever it is. But to take in the positive socialogical aspects of faith there can be alot of good that it can produce (relative to what your perspective on good is).
I mean even on the off chance in the end a god existed in the fashion you believed, then i guess you win in the end too

however IMO life in the meantime has a sense of purpose, and oftentimes a degree of fulfillment that can oftentimes be lacking.