Values

How do you define 'social value'? We hear of value based education system, ethics, morality and so on. The truth, we all know, is that these concepts vary from time to time - what we consider as moral today may become immoral today and vice versa. Child marriage was moral when Manusmriti was the law. Is it so now?
Is it reasonable to force others to follow what we think is the moral behaviour? Every person has a different view of ethics and morality. Just because a person has the power to set the rules, is it right that his or her ideals become the standards for the rest of the society? Isn't it the case of 'might is right', all over again?
There is the other side to it too. Psychopaths have a different sense of right and wrong. But accepting their views may be detrimental to the society as a whole. Human society cannot survive without a basic set of rules and an enforcement system. There is this delicate balance between freedom and social order that everyone, every society is trying to find.
But will anyone find it? I doubt it.