Cultural relativism is the view that moral or ethical beliefs are determined by the culture one is brought up in. James Rachels argues that cultural relativism's main logical flaw is that citing cultural differences is not a valid argument. He refers to this as the "cultural differences argument." According to Rachels, just because beliefs differ across cultures does not prove that no culture has a superior understanding of morality. A summary is provided of the key points to address in a short assignment on defining cultural relativism and explaining Rachels' criticism of the cultural differences argument for relativism.