Old timers meet up at the local coffee shop and talk about things that has happened since the last time they met for a cup or they share memories of their long since over war stories. Some things have not changed for 1000s of years.

Wheither it is telling yesterday's events of drama or some early tribal campfire story telling, there is most often some point to the story. What the point of these stories often make is that something happened, there was an outcome and it explains how things worked out . These stories would explain what went right or what went wrong to bring about the outcome. As people sit around campfires or coffee shops telling their stories they get more and more understanding about contrasts of thing working out right or wrong. As early campfire types of people shared more stories their general conceptual understanding of rights and wrongs grew or developed.

Often these stores can be give a general synopsis for the main point of the story called a principle. The principles often considered a wise saying or proverb.

Instead of memorizing a lot of stores a person can learn a general principle and often apply it it various different situations. The more stories a person hears or the more personal experiences a person has, the more principles they can develop. These principles can be easily passed on to others with out telling the full story.

The next phase that would develop, perhaps in conjunction with the size of the tribe growth, would be rule making. Prior to writing these would be verbal and could be developed from the stories, the principles and/or those having the most influence or control of the group. Eventually, as writing becomes learned, rules get written down and become called more so, a law, as we now see in large complex societies. Just to note: Rules and laws are more so branched in connection to the tree of knowledge of good and evil for they can be made up with or without principle.

This really only explains half of the generally accepted definition of moral as listed below in #1. With moral definitions often includes both "rights and wrong" along with "good and bad(evil)".

Perhaps in another post I would discuss the "good and bad(evil)" conceptual understanding development that is the other half of most definitions of moral. "Right and wrong" and "good and evil" are extremely synonymous, often used interchangeably, but still have distinctive and developmental differences.

(From Google search)
Moral

1. concerned with the principles of right and wrong behavior and the goodness or badness of human character.
   "the moral dimensions of medical intervention"
   Similar:
   virtuous
   good
   righteous
   upright
   upstanding
   high-minded
   right-minded
   principled
   proper
   honorable
   honest
   just
   noble
   incorruptible
   scrupulous
   respectable
   decent
   irreproachable
   truthful
   law-abiding
   clean-living
   chaste
   pure
   blameless
   sinless
   Opposite:
   immoral
   bad
   dishonorable
   concerned with or derived from the code of interpersonal behavior that is considered right or acceptable in a particular society.
   "an individual's ambitions may get out of step with the general moral code"
   Similar:
   ethical
   social
   behavioral
   to do with right and wrong
   examining the nature of ethics and the foundations of good and bad character and conduct.
   "moral philosophers"

2. holding or manifesting high principles for proper conduct.
   "he prides himself on being a highly moral and ethical person"
   noun
   noun: moral; plural noun: morals

3. a lesson, especially one concerning what is right or prudent, that can be derived from a story, a piece of information, or an experience.
   "the moral of this story was that one must see the beauty in what one has"
   Similar:
   lesson
   message
   meaning
   significance
   signification
   import
   point
   precept
   teaching

4. a person's standards of behavior or beliefs concerning what is and is not acceptable for them to do.
   "the corruption of public morals"