Ours is a paradoxical era where the gap between the irony of radical ethical relativism and the arrogance of the ethically correct, saturated with standardivity, seems unfathomable. The apparently purely theoretical question of ethical relativism is, in our opinion, a rather effective test of our will and our capacity to overcome the mortal opposition of moral scepticism and ethical absolutism. This cultural and psychic situation disturbs the way we come to grips with everyday questions raised by an increasing number of bioethical and ethical issues. The credibility and plausibility of ethical propositions are necessarily affected. In reality, this is not a theoretical question. Relativism plays an important role in everyday clinical decision making: how can I avoid being overcome by the relativity of the different ethical attitudes encountered yet make clear decisions without missing the real complexity and legitimate diversity of the opinions presented ?