In many sentences of the Quran and other Abrahamic religious books, we are told about many different people who were immoral (thieves, corruption, adultery, etc.) until prophets come and help them become moral.
Assume, for the purposes of this post, that this is true.
Today, there are no prophets. We believe, instead, that today's morality is provided by the law and its arbiters. However, the old days provides numerous examples in which laws are not enough to provide justice so immorality is unavoidable or in a short period of time one who has evil power can cancel all laws and makes his power as single rule. This was only ended with the help of the prophets, whose aid we can no longer ask for.
So is there no other way to help people stay in the moral state?
The two options I hear proposed for this moral state are that it is brought about by rational questioning, or it is simply natural.
If it is rational, then why do people tend towards irrationality? Additionally, can those with power destroy morality, even justice?
If it is natural, can somebody provide a justification for this assertion?(citation)