To say there would be morality without religion is pretty absurd in my opinion. That isn't to argue that there is or isn't a god(s). It is only to argue that religion itself is/was necessary for the advancement of human kind and of its moral disposition.
Without religions of all kinds, which for the most part have very similar beliefs on a majority of right and wrong topics, these frameworks of right and wrong never would have become widespread. Of course this came at a price as human nature, pride, etc. would eventually lead to war, etc. when two groups of people would eventually encounter each other. That isn't to say that religion is to blame for these wars (though in some cases it certainly was/ is a driving force). Human beings and animals alike have had different groups warring with each other since the beginning of time.
I'm also not arguing here that there won't come a time when (and maybe it has already arrived) human beings "outgrow" religion. When we as a species no longer need religion to remain moral.