Okay say we did away with all religions all over the entire world. You would still have to base all those societies on a set of rules to prevent anarchy, and those rules would look exactly the same as the rules in our religious books that most societies are already based on.
So congratulations getting rid of religion will solve nothing and we will be in the exact same place anyways.
This is why every time I see a thread bashing religion I tend to think every single person in those threads are derps because even without religion a society would based on the same rule set that religion was already doing...
People don't look deep enough to see this and it annoys the hell out of me.
EDIT: Oh so you say getting rid of religion will cause a lot less violence? Wrong again! If societies were based on a rule set made strictly by humans, then a lot more people would question those rule sets and it would ultimately lead to violence and rebellion. A lot like religion does already.
You can't really question a religious rule set as much because it is, supposedly, made by a higher supernatural being that is beyond all individuals.