Let's put evolution aside for a minute. Because it might be wrong. Unlikely, but possible.
Look at the screen in front of you. Neither of us knows how it works, but it is derived from scientific experimentation and rational thought via many many different people over a long period of time. That is the proof of the scientific system and how it develops human understanding and abilities, eases suffering, enables communication and connection, and performs miracles everyday (e.g. giving people the ability to fly).
A faith-based rationale, a single viewpoint, a small number of books - and if you believe it, even an omnipresent and omnipotent being, did not deliver any of these amazing things.
The development of evolutionary understanding (of which Darwin's theory is but one component) uses the same principles as those that allow you to sit in front of your computer typing. Or got to the store in your car to buy food you didn't grow yourself. Or that allows you to fly somewhere on vacation. Or cure you of cancer. That's why it's likely to be better than belief in a single book or ideal, or a God who seemingly cannot or will not do any of these things, and so, if he did exist, must at best be disinterested in humans.
Absence of evidence really is evidence of absence.