Ethics and Social Conventions
Let us return to the relationship of ethics and social conventions. For more than a hundred years in the United States, most people considered slavery to be justified and desirable. It was part of social custom. There can be no question that, all along, this practice was unethical. Moreover, throughout history, many groups of people, including people of various nationalities and skin colors, as well as females, children, and individuals with disabilities, have been victims of discrimination as the result of social convention treated as ethical obligation. Yet, all social practices that violate ethical principles deserve to be rejected by ethically sensitive, reasonable persons no matter how many people support those practices.
Unless we learn to soundly critique the social mores and taboos that have been imposed upon us from birth, we will accept those traditions as "right." All of us are deeply socially conditioned. Therefore, we do not naturally develop the ability to effectively critique social norms and taboos.