Abstract

The classic theory of Common Law is based on the idea of a law derived from immemorial customs that guide judges’ decisions and contribute to the continuity and stability of the legal order. Hobbes, in his criticism of Edward Coke, questions the legal principles that characterize the “spirit of Common Law”. In his view, it is authority and not use that makes the law. This Hobbesian criticism, which can be considered as one of the ­sources of positivist interpretation of customary law, first raises the question of the legal validity of custom but also leads to an original analysis of the court decisions and precedents. Two forms of rationality of law are opposed: one based on custom and knowledge of which is an “artificial reason”, the other based on natural law and the prescriptions of the judges’ individual reason.