Ethical relativism has two categories: subjectivism and conventionalism. Subjectivism is all about the individual, like it is everyone for themselves. This idea makes people like Hitler, Bundy, and members of the KKK (just to name a few) justified in their actions. With conventionalism it is all about the society or culture, but then it becomes a question of how many individuals it takes to make a society. If there are enough Hitler-like people then they can form their own culture with its own morals and anything goes again. Both of these views of ethical relativism seem to be going in circles allowing all behavior as acceptable.
Another issue with ethical relativism – whether it is subjective or conventional – is that a person has to determine what is their primary culture. Culture is made up of so many aspects like location, race, gender, religion, sexual status, etc. that a person could be making a moral decision that goes against one part of their culture but is acceptable with another part.
Pojman outlines ethical relativism and then discusses moral objectivism as the correct idea. He argues that it only takes one moral principle for all people to show that relativism is