The Big Bang didn't happen until the 20th century??? Wow, it must have been the little popper gun before that. Actually, I was referring to the one referring to the Big Bang Theory creating the universe and the solar system we know today which then gives rise later to their being conditions for the formation of life or the Theory of Evolution. Thus one does arise from the other. I'm not referring to when the theories came about.
But off course they're two separate unrelated processes. How the universe came to be has no more bearing on evolutionary mechanisms than your parents' specific position at the moment of your conception has to do with the content of the missives you post on this website.