The problem of legal normativity is one the most controversial issues in the philosophy of law. It was already a subject of heated debate in the 19th century and, over the last one hund-red years, the study of normativity has taken many shapes and forms: from Kelsen?s dualism, through the reductionism proposed by legal rea-lists, to some nihilistic stances. In re-cent years there has been a renewed interest in the problems surrounding the concept of law?s normativity and this volume is seen as a contribution to that debate.