We'd be better off. People could have their own "spirituality" but organized religion is not needed.
If there is a "creator" he doesn't need to be worshipped like a petty, spoiled celebrity, just be a nice fucking person, it's not that hard, treat others the way you want to be treated. There you go.
What Middle Eastern goat herders wrote down should not be the basis of living in the 21st fucking century. They'd worship a working toilet if you went back in time and showed it to them because they wouldn't understand it.