Modern moral and political philosophy is in debt with natural law theory, both in its ancient and mediaeval elaborations. While the very notion of a natural law has proved highly controversial among 20th Century scholars, the last decades have witnessed a renewed interest in it. Indeed, the threats and challenges as result of multiculturalism, plural societies and global changes have generated a renewed attention to natural law theory. Clearly, it offers solid basis as possible framework to a better understanding of human goods without contradictions and partial bias. The purpose of the present volume is to provide an overview of the history of this concept (Cicero, St. Paul, Aquinas, Melanchthon, Montaigne, Descartes, Leibniz, Hume, Burke, Kant, MacIntyre, etc.) as well as a deep understanding of ongoing research, both in Europe and in America. Furthermore, the specificity of these studies will be of particular value to philosophers, law-philosophers, historians, anthropologists, sociologists and theologians, and those concerned on such issues as the relation between law and moral norm, law and practical reason, and the presence of the idea of natural law in several prominent thinkers. It includes a selected bibliography on natural law. The book also provides an excellent introduction to several of the major topics in natural law theory making it useful both as a reference text and as a sourcebook for academics alike. Natural law is a rich, complex, and highly disputed term. Since its first appearances in the history of Western civilization, it has been used both to point to God as the source of the moral order and to assert that there is an objective order of justice in nature that men and their laws ought to respect. In modern times, natural law theory gave birth to what we usually call human rights. Unlike the meaning of the term, the importance of an ongoing debate on natural law and on the theories related to it is undisputable. This is why I welcome today this new collection of essays edited by Alejandro Nestor Garcia Martinez, Mario eilar and Jose M. Torralba. Natural Law: Historical, Systematic and Juridical Approaches includes a wide variety of studies, covering key authors and issues in natural law theory. Younger students will appreciate the clarity of the chapters, and more trained readers the detailed and accurate bibliographical references that each of them offers. The editors's choice to go from a historical approach to contemporary theories, and then to theoretical and more practical issues is also commendable. Students in philosophy and in legal theory will greatly benefit from this book. -Fulvio Di Blasi, author of God and the Natural Law: A Rereading of Thomas Aquinas