Let's say you wake up tomorrow and thete is definitive, concrete evidence that no God exists. How do you feel? How do you live your life? What changes, if anything?
Nothing much would change except that we would recognize that if we want change in the world, it is to mankind to do the changing and we should direct all prayers to ourselves.
We naturally have a default position of cooperation as that serves our survival better than competition. IOW, we are born good and only turn to doing the evil of competing due to how we have set up society.
That is not really a complaint because without both cooperating and competing, as required, is how the fittest comes to be known.
Regards
DL