Ethical relativism is the theory that holds that morality is relative to the norms of one's culture. That is, whether an action is right or wrong depends on the moral norms of the society in which it is practiced. The same action may be morally right in one society but be morally wrong in another. The only moral standards against which a society's practices can be judged are its own. If ethical relativism is correct, there can be no common framework for resolving moral disputes or for reaching agreement on ethical matters among members of different societies.
Most ethicists reject the theory of ethical relativism.
Some claim that while the moral practices of societies may differ, the fundamental moral principles underlying these practices do not. For example, in some societies, killing one's parents after they reached a certain age was common practice, stemming from the belief that people were better off in the afterlife if they entered it while still physically active and vigorous. While such a practice would be condemned in our society, we would agree with these societies on the underlying moral principle - the duty to care for parents. Societies, then, may differ in their Placation of fundamental moral principles but agree on the principles themselves. Also, it is argued, it may be the case that some moral beliefs are culturally relative whereas others are not.