We not only would be better off without religion to start with, we would probably do well with some form of worldwide governing body.
We will never unite with all this religion around, the gods are dying though, if we don`t meet with some sort of worldwide extinction event, I feel that eventually we would fully outgrow religion. We would even look back on christianity with the same casual interest that we look on ancient American Indian folklore today. -as the myths it all should be.