'The Lord of the Rings and Philosophy'

[Eurytus]

Some sort of religious belief is the only thing that would compel everyone, without exception, to behave morally.

It is probably not a debate we should be having here but I find this answer to be totally wrong. A quick look back through history shows that religion very rarely helps people to act morally, and when it does those actions often do not appear to be moral to outside observers.
Cynically speaking it is extremely unlikely that there will ever be a time when everybody acts in a moral way. People’s morals are different and hence people may act in a way that they feel is moral but that I, for example, do not.
The only really way to obtain a standard morality is to impose restrictions or guidelines and enforce them through either the carrot or the stick.
However human nature being what it is, this is unlikely to be successful.