Moral universalism is opposed to moral nihilism and moral relativism. Moral nihilism is distinct from moral relativism, which acknowledges individual or cultural moral values. These ideas are generally related to nihilism, philosophical skepticism and relativism. Thus Gendlin's philosophy goes beyond relativism and postmodernism. He has repeatedly stated that cultural relativism and egalitarianism are contradictory values. The term "relativism" often comes up in debates over postmodernism, poststructuralism and phenomenology. He is an outspoken opponent to all kinds of social constructivism and postmodern relativism. The IB pursues a postmodern view of tolerance and relativism. This principle should not be confused with moral relativism. Another argument against relativism posits a Natural Law. Either/Or between relativism and foundationalism that affects contemporary culture. Thus the French structuralists considered themselves to be espousing Relativism and Constructionism. Sophists are considered the founding fathers of relativism in Western philosophy. Renteln faults philosophers for disregarding the heuristic and critical functions of cultural relativism. The issue is relativism versus absolute truths.