Over the past three millennia, social scientists, historians, and ethicists have all debated the history, purpose, and reason for the development and subsequent failure of ethical systems in society after society. From these endless studies, several facts appear obvious, yet ignored.
First, the ancient Judeo-Christian concept of 'original-sin' as described in basic prediaspora Catholic/Christian theology was and remains an extremely useful tool for social indoctrination, because (1) it provides a reason for evil while also allowing people to accept that evil is not the fault of the given individual; (2) supplies a rationale for why people need to be taught ethics and manners; and (3) still requires that people adhere to an acceptable moral code.
Second, genetic studies have since revealed that only a small minority of human beings have a strong genetic predilection toward either 'morality' or 'immorality'. This has historically posed a problem for any civil society based on purely secular rule because (1) society in the end is based on some form of self-restraint; and (2) the impetus to require self-discipline and to learn greater awareness of what is evil and unacceptable lacks the religious underpinnings present in a theocracy or a society with a strong theocratic presence. Likewise, history has also demonstrated most clearly that the majority of individuals are uncomfortable in accepting a moral code that is not based on the 'revelation' of a divine being, because in matters of personal ethics, each believes his or her ethics are superior to any not of 'divine' origin.
As transparently fallacious as this widely held personal belief may be, equally transparent and fallacious — and even more widely accepted — are the ethical and moral systems accepted as created by divinities — and merely revealed to the prophets of each deity for dissemination to the 'faithful'. Throughout history, this has been a useful but transparent fiction because the 'divine' origin of moral codes obviates the need for deciding between various human codes. Humans being humans, however, the conflict then escalates into a struggle over whose god or whose interpretation of god is superior, rather than focusing on the values of the codes themselves ...
The Ethos Effect - page:154,156
L. E. Modesitt Jr.
Very clear, and true observation of how these issues, have played out all through history, and are continuing today.