The book we offer to our readers is devoted to the main problems of contemporary theory and philosophy of law. As the authors state in the preface, Of course, the present situation of general legal sciences is far from being unique. These sciences have always been sensitive to the trends and standards governing their environment, first and foremost in the area of the humanities and social sciences. This tendency may also be observed today. It finds its expression in, among other elements, the expansion of different so-called critical theories (philosophies) usually identified with postmodern thinking. On the other hand, there are theories explicitly competitive with postmodernism and attempting to apply in legal research methods elaborated within cognitive sciences, mainly in linguistics or psychology.