"It is only by recognizing the conflict between a given rule and the rest of our moral beliefs that we can justify our rejection of an established rule.  Even the success of an innovation by a rule-breaker, and the trust of those who follow him, has to be bought by the esteem he has earned by the scrupulous observation of most of the existing rules.  To become legitimized, the new rules have to obtain the approval of society at large - not by a formal vote, but by gradually speading acceptance.

"The successive changes in morals were therefore not a moral decline, even though they offended inherited sentiments, but a necessary condition to the rise of the open society of free men."

FA Hayek, Law, Legislation and Liberty