Relativism is the belief that a harmful act is ‘right’ if the perpetrator claims it is ‘right,’ but what is right and what is wrong is not always relative.
Ethics Unwrapped Blog
Know and appeal to a short list of widely shared values. Dont assume too little or too much commonality with the viewpoints of others.
When making ethical decisions, the one consideration that a theory favors over all other considerations is called the Fundamental Moral Unit.