@lefty Said
There are no absolutes when dealing with people and their ethics and morality. Each person's ethics and morality are a part of their character, and their character is the sum of all their life's experiences.
Each person is unique.
[When in Rome]
The terms ethics and morality are both used in reference to right and wrong behaviors.
It would not be incorrect to use the term morality in reference to good and evil where, in this context, good refers to intention to benefit and evil refers to intention to harm. The intention to harm would be evil even if the consequence of the behavior resulted in benefit. So an evil intention resulting in a behavior is evil regardless of the consequences of the behavior. And a good intention resulting in a behavior is good regardless of the consequences.
It would not be incorrect to use the term ethics in reference to behavior that is considered good and bad and since this thread is about ethics we can focus on behaviors that are considered good and bad and leave morality for another time.
Good behavior is that which is in accord with contemporary regional standards of conduct and bad behavior is that which is not in accord with contemporary regional standards of conduct.
A particular society will have standards of behavior for its members and those that do not adhere to the standards tend to find themselves ostracized, incarcerated, or tacked up to a cross wondering why they have been forsaken.
Within every culture there are sub-cultures; each sub-culture adhering to the over standards of conduct of the society that they are in and each sub-culture with its own slight variations on the standards; and as you have pointed out, every individual in a society is a sub-culture unto themselves.
It is nevertheless best to at least pretend to adhere to contemporary regional standards of conduct (i.e. when in Rome do as the Romans do)